Document:

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Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

                                                                   Exhibit 10.11

                           SERVICES AGREEMENT BETWEEN
                               ATHENAHEALTH, INC.
                                       AND
                            VISION HEALTHSOURCE, INC.

THIS SERVICES AGREEMENT (the "Agreement") is entered into this December 9, 2002
(the "Effective Date") by and among VISION HEALTHSOURCE, INC., a Delaware
corporation with its principal place of business at 8000 Towers Crescent Drive,
Suite 1350, Vienna Virginia 22182 ("Vision"), Vision Healthsource India Private
Ltd., a, ____________________ corporation with its principal place of business
at DP 110 (Second Phase) F-19, Industrial Estate, Ambattur, Chennai, 600 058,
India ("Healthsource") and athenahealth, Inc., a Delaware corporation with a
principal place of business at One Moody St. Waltham, MA 02453 ("Athena").
Vision and Athena are referred to herein as the "Parties" and each as a "Party."

     NOW, THEREFORE, in consideration of the mutual covenants hereinafter set
forth, the Parties agree as follows:

1) Provision of Services,

a) Services to be Provided. Under the terms and subject to the conditions and
obligations of this Agreement, Vision will provide, and Athena hereby accepts,
the services described in Exhibit A (the "Services")

b) Subcontracting. No subcontracting of the Services by Vision will be permitted
without prior written permission of Athena, provided that Vision may arrange for
the performance of some or all of the Services by its affiliated company,
Healthsource, pursuant to a transfer pricing agreement or other arrangement, and
provided further that Vision will remain subject to and responsible for its
obligations and undertakings in this Agreement by its terms. No other
subcontracting of the Services by Healthsource will be permitted without prior
written permission of Athena.

c) Changes. Athena may request in writing commercially reasonable changes in the
scope of Services delivered pursuant to this Agreement that do not alter the
fundamental nature of the obligations and/or the rights of either Vision or
Athena. Upon receipt of each such request from Athena (a "Change Request"),
Vision will evaluate the impact that the Change Request will have on the
resources required by Vision to perform the Services and the charges then
payable to Vision under this Agreement. Vision will give written notice to
Athena as to the results of such evaluation within fifteen (15) days following
the date of receipt of a Change Request, which response will indicate whether
Vision is agreeable to implementing the Change Request. If Vision is agreeable,
Vision will set forth: (i) the change in cost, if any, to Athena and (ii) the
schedule associated with implementing the Change Request. Athena will then
notify Vision in writing within fifteen (15) days of receipt of such notice from
Vision whether or not to implement the Change Request in accordance with
Vision's advice regarding cost and implementation schedule. Any change resulting
from a Change Request must be evidenced in the form of a written amendment to
this Exhibit A. Until and unless reduced to a mutually acceptable amendment,
executed by the parties to this Agreement, no Change Request will alter the
terms and conditions of this Agreement.

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d) Communication Contact. Athena and Vision will each designate a project
manager who will act as a point of contact for all day-to-day matters relating
to the provision of the Services. The parties will provide a telephone number
and an e-mail address for their designated contact, to be utilized for purposes
of this Agreement. The communication contact will not have authority to modify,
formally or through a course of dealings, the material terms and conditions of
this Agreement.

2) Price and Payment.

a) Pricing. In return for the provision of the Services, Athena will pay Vision
a monthly fee (prorated for any partial month) as set forth in Exhibit A.

b) Additional Charges., In addition to the fees set forth in Exhibit A, Athena
will be responsible for payment of any and all excise, use and sales taxes
levied by the United states or by any state of the United States upon Athena and
upon Vision by reason of the Services, provided that Vision will promptly notify
Athena of the need to make any necessary filings with respect to such charges or
to pay such charges to the extent Vision has notice or knowledge thereof. Vision
and Healthsource will cooperate with Athena in any reasonable effort to limit
such charges or to seek legally appropriate refunds or abatements. Athena will
not be responsible, and Vision or Healthsource, will be responsible for payment
of property taxes, income and excise taxes, franchise taxes, employment taxes
and other taxes and tariffs levied on Vision or Healthsource by reason of either
their doing business, domicile, place of operations, retention and payment of
employees, status, revenue, or property. Athena is not responsible, and Vision
or Healthsource is responsible as the case may be, for any and all taxes,
tariffs or other charges imposed by any other governmental body or authority
other than the United States of or any state of the United States in connection
with the Services. Each party will indemnify and hold the other party harmless
from any taxes and/or any related interest or penalty and reasonable attorneys'
fees associated with any failure to fulfill its obligations as to taxes
hereunder.

c) Billing and Payment. Vision will bill Athena on a monthly basis for services
furnished during the previous month, net thirty days. All amounts payable
hereunder shall be paid to Vision in United States Dollars by wire transfer to
an account designated by Vision. To the extent that any bill is based upon items
such as time, number of transactions or operations, number of personnel or
similar quantifiable items or contains Additional Charges as set forth in
Exhibit A, each bill will set forth an account for such items and charges on
which it is based sufficient for Athena to verify any necessary calculations.
Vision's invoices will reflect any adjustments to past invoices required under
Exhibit A.

3) Term and Termination

a) Term. This Agreement will continue in effect for thirty-six (36) months from
the Effective Date (the "Initial Term"). Upon expiration of the Initial Term,
this Agreement will automatically renew for consecutive periods of twenty-four
(24) months each, unless one Party has given the other Parties written notice of
its intent to cancel at least six (6) months prior to the expiration of the then
current term.

b) Termination for Cause.

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i) Notwithstanding the foregoing, Athena may terminate this Agreement if either
Vision or Healthsource: (a) materially breaches or defaults as to any of its
obligations or warranties hereunder or any conditions imposed upon it hereunder
(other than those obligations, warranties or conditions in Section 6) and does
not cure such breach or default within thirty (30) days after receiving written
notice from the terminating Party specifying the breach or default provided that
if the breach or default consists of the exceeding of any time requirement under
this Agreement by Vision or Healthsource and is not a part of a recurring or
persistent pattern of such breach or default, then such cure may consist of
measures described in writing to Athena that are reasonably acceptable in good
faith to Athena, that are reasonably calculated to avoid similar breach or
default prospectively and that are reasonably calculated to compensate Athena
for the effects of such breach or default in the past, (b) breaches the
obligations or conditions in Section 6, (c) makes any assignment for the benefit
of creditors, is insolvent or unable to pay its debts as they mature in the
ordinary course of business, (d) commits any material act of dishonesty, gross
carelessness or willful misconduct in performance of this Agreement, even if the
same would not otherwise constitute a breach of this Agreement; (e) has
instituted by or against it any proceedings in bankruptcy or under any
insolvency laws or for reorganization, receivership or dissolution (and if
involuntary, the proceeding is not dismissed within 60 days), or (f) in the
absence of such termination it is not possible for Athena to maintain an
effective compliance plan as described in Section 5 of this Agreement. A
termination pursuant to clause (a) or clause (f) above will be effective on the
date that is the last day of the notice period, unless the notice specifies a
later date which later date cannot be more than 30 days after the end of the
notice period, and pursuant to clauses (b), (c), (d) and (e) above will be
effective on the date of notice (each a "Termination Date").

ii) Vision may terminate this Agreement if (a) Athena materially breaches or
defaults as to any of its obligations or warranties hereunder or any conditions
imposed upon it hereunder (other than those obligations, warranties or
conditions in Section 6) and does not cure such breach or default within thirty
(30) days after receiving written notice from the terminating Party specifying
the breach or default (except that Athena will have only ten (10) business days
to cure any breach of any payment term of this Agreement) provided that if the
breach or default consists of the exceeding of any time requirement under this
Agreement by Athena and is not a part of a recurring or persistent pattern of
such breach or default, then such cure may consist of measures described in
writing to Vision that are reasonably acceptable in good faith to Vision, that
are reasonably calculated to avoid similar breach or default prospectively and
that are reasonably calculated to compensate Vision for the effects of such
breach or default in the past, (b) Athena breaches the obligations or conditions
in Section 6, (c) Athena makes any assignment for the benefit of creditors, is
insolvent or unable to pay its debts as they mature in the ordinary course of
business, (d) Athena commits any material act of dishonesty, gross carelessness
or willful misconduct in performance of this Agreement, even if the same would
not otherwise constitute a breach of this Agreement; (e) Athena has instituted
by or against it any proceedings in bankruptcy or under any insolvency laws or
for reorganization, receivership or dissolution, or (f) in the absence of such
termination it is not possible for Vision and Healthsource to maintain an
effective compliance plan as described in Section 5 of this Agreement. A
termination pursuant to clause (a) or clause (f) above will be effective on the
date that is the last day of the notice period, unless the notice specifies a
later date which later date cannot be more than 30 days after the end of the
notice period, and pursuant to clauses (b), (c), (d) and (e) above will be
effective on the date of notice (each a "Termination Date"). In addition to the
rights set forth above and

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notwithstanding any other provision of this Agreement, Vision may terminate the
provision of services as to any client or customer of Athena without terminating
this Agreement by providing written notice thereof to Athena if in the absence
of such cessation it is not possible for Vision and Healthsource to maintain an
effective compliance plan as described in Section 5 of this Agreement, provided
that Vision provides to Athena before or at the time of such notice an
explanation for the cessation in enough detail to permit Athena to investigate
and verify it, provided that Vision's cessation of services to the Athena
customer will be effective on the date specified, which shall not be less than
30 days after provision of notice to Athena.

c) Termination without Cause. Notwithstanding the foregoing, either Athena or
Vision may terminate this Agreement at any time upon 180 days prior written
notice to the other. A termination pursuant to this subsection (c) will be
effective on the date that is the last day of the notice period, unless the
notice specifies a later date which later date cannot be more than 180 days
after the end of the notice period (also a "Termination Date").

d) Effect of Termination. Upon the Termination Date, Vision will immediately
cease providing all Services. Within fifteen (15) days after any termination,
Athena will pay to Vision any unpaid fees properly due for Services performed to
the date of termination, and Vision will credit (or pay in the event of a credit
that cannot be applied) any unapplied credits properly due with respect to
Services performed to the date of termination. Unless Vision has properly
terminated the Agreement under Section 3) b) ii) or unless Athena fails to
timely make the foregoing final payment, Vision will provide a reasonable amount
of assistance to Athena in connection with the transition of the Services to
Athena or a third party; provided, however, that without Vision's written
consent such assistance will in no event be required beyond the one month
anniversary of the Termination Date. Athena will pay Vision its reasonable fees
for such assistance, which fees will be consistent with those fees usually and
customarily charged by Vision to its customers for the services of the Vision
and Healthsource personnel involved for similar services, together with any
out-of-pocket costs reasonably incurred by Vision in connection with such
services. Vision may require a prepayment against such costs, based on a good
faith estimate communicated to Athena in writing. Notwithstanding the foregoing,
Vision may require Athena and any third party to which it renders assistance to
enter into a written confidentiality agreement with Vision, in a form reasonably
proposed by Vision, in connection with such assistance and, in no event, will
such assistance in the absence of such agreement require that Vision disclose to
Athena or to any third party any confidential or proprietary information which
is a trade-secret or held subject to similar considerations of confidentiality
or which is otherwise not adequately protected, in Vision's good faith judgment,
by patent, copyright or similar registration under a United States, India and/or
other applicable international statutory regime for the protection of
intellectual property.

4) Survival. Sections 3 d), 4, 7, 11, 12, 13, and 14 will survive any expiration
or termination of this Agreement and will continue in effect and binding upon
the Parties.

5) Compliance with Laws. Each Party agrees to comply with all applicable laws,
rules and regulations in its performance of this Agreement, including but not
limited to applicable healthcare and export laws, rules and regulations. Vision,
Healthsource and Athena will each implement and maintain an effective compliance
program consistent with the standards set forth in the United States Sentencing
Guidelines and the Compliance Program Guidance for Third

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Party Medical Billing Companies issued by the Office of the Inspector General of
Health and Human Services; and, without limitation, Vision's compliance program
will substantially conform to the compliance materials presented to Athena in
Vision's written proposal for outsourced medical billing services dated February
22, 2002. To the extent that such compliance by a Party reasonably requires the
cooperation of or information from another Party, then such other Party will
cooperate and provide any information necessary at that other Party's own
expense, provided that no Party will be required hereby to waive rights that it
may have to refuse to disclose information that is confidential or proprietary
as defined herein, legally privileged, or by disclosing information to that
would violate any legal requirement or duty. Athena will contractually require
that all customers who receive services from Vision under this Agreement
cooperate promptly with Athena to provide accurate and full responses to any
material inquiry or concern related to and to any reasonable request for
clarification, documentation or further information related to billing. Athena
will enforce such agreement as reasonably required to assist Athena in
fulfilling its obligations hereunder. To the extent considered appropriate, each
party will, through legal counsel, discuss in good faith the entry into a joint
defense agreement by the parties with respect to such disclosure on such terms
as the parties may mutually agree. The Parties recognize that various laws and
regulations are developing in connection with the Services; and, they will
promptly negotiate in good faith to amend this Agreement as necessary so as to
incorporate any legally required contractual provisions and to allocate fairly
between them the costs and burdens, if any, associated with performance of
specific, legally required contractual features or measures beyond those set
forth herein or otherwise existing as of the Effective Date.

6) Audit. Each Party will keep accurate and appropriate business records of ITS
activities relating to this Agreement. Each Party will have the right to audit
the other Parties' records to the extent reasonably necessary to verify any
reports provided by such Party, to verify each Party's compliance with its
obligations under this Agreement or to verify any charge or payment amount. Such
audit will take place, upon reasonable written notice to the Party being
audited, during regular business hours, and at the principal offices of the
Party to be audited listed above or at a mutually agreed location. Vision and
Healthsource, between them will have the right to request an audit of Athena not
more often than twice during any consecutive twelve (12) month period. Athena
will have the right to request an audit of each of Vision and Healthsource not
more often than twice during any consecutive twelve (12) month period. At
Athena's written request, Vision and Healthsource will each promptly make
available to it business records detailing the basis for any charge billed to
Athena hereunder. All audits will be scheduled in such a manner as not to
interfere unreasonably with the operations of the Party subject to the audit.
Each Party is responsible for its own expenses associated with any audit.

7) Ownership of Data and Intellectual Property. Confidentiality.

a) All data, statistics, records, reports, programs, procedures, business
processes, formats, screens, functionality and similar items disclosed or
provided by Athena or obtained by Vision or Healthsource from Athena in the
connection with this Agreement, including but not limited to data and databases
consisting of data provided by Athena under this Agreement that have been
processed or altered by Vision or by Healthsource and the formats for such data,
are and will at all times remain the sole property of Athena or Athena's
customers.. No license is hereby granted

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to either Vision or Healthsource in connection with such items, other than
permission to use such items as specified in this Agreement.

b) All data, statistics, records, reports, programs, procedures, business
processes, formats, screens, functionality and similar items disclosed or
provided by Vision or obtained by Athena from Vision in the connection with this
Agreement, other than data and databases consisting of data provided by Athena
under this Agreement that have been processed or altered by Vision or by
Healthsource and the formats for such data, are and will at all times remain the
sole property of Vision, including any software or other technology developed by
Vision in connection with the Services or in connection with establishing
electronic communication inter-face and/or connectivity with Athena, even if
developed specifically for Athena or provided directly or indirectly to Athena
in connection with the Services. No license is hereby granted to Athena in
connection with such items.

c) For purposes of this Section 7, and without limiting the scope of Sections 7
a) and b), the following terms have the following meanings:

"Confidential Information" will mean information concerning a Party's technology
or business that Vision or Healthsource receive from Athena or that Athena
receives from Vision or Healthsource in connection with this Agreement,
including, without limitation, computer programs and codes, data relating to the
disclosing Party's customers and customer transactions and other technical,
business, financial, customer and product development plans, forecasts,
strategies and information about the Party or its business. Except with respect
to Practice Information, "Confidential Information" will not include information
that (i) is otherwise agreed by the Parties in writing not to be Confidential
Information, (ii) is in or (through no improper action or inaction by the Party
receiving it or any affiliate, agent or employee) enters the public domain,
(iii) is established by the receiving Party using contemporaneous business
records to have to have been rightfully in that Party's possession or known by
it prior to receipt from the disclosing Party, (iv) is established by the
receiving Party using contemporaneous business records to have been rightfully
disclosed to the receiving Party by another person without restriction or (v) is
established by the receiving Party using contemporaneous business records to
have been independently developed by the receiving Party by persons without
access to the Confidential Information and without use of any such information.
No provision of this Agreement will prevent disclosure to a governmental entity
or agency in connection with any governmental or regulatory approval, or
pursuant to the lawful requirement or request of a governmental entity or
agency, provided that reasonable measures are taken against further disclosure.

"Practice Information" will mean a subset of Confidential Information that
consists of information accessed or received by Vision by reason of or in
connection with this Agreement concerning any customer of Athena or the patients
of any customer of Athena, including, but not limited to, financial information
and patient medical and demographic information.

d) Vision and Healthsource, to the extent that Vision subcontracts with it to
perform some or all of the Services, are authorized under this Agreement to
disclose and use Confidential Information of Athena only in performance of its
obligations or pursuant to its rights under this Agreement. Vision and
Healthsource will use reasonable precautions to maintain such

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Confidential Information as confidential and to protect such Confidential
Information from unauthorized disclosure and without limitation will employ at
least those precautions in this regard that Vision employs to protect its own
similar information.

e) Athena is authorized under this Agreement to disclose and use Confidential
Information of Vision and Healthsource only in performance of its obligations or
pursuant to its rights under this Agreement. Athena will use reasonable
precautions to maintain such Confidential Information as confidential and to
protect such Confidential Information from unauthorized disclosure and without
limitation will employ at least those precautions in this regard that Athena
employs to protect its own similar information.

f) Without limitation of the obligations set forth herein with respect to
Confidential Information, Vision and Healthsource, to the extent that Vision
subcontracts with it to perform some or all of the Services, will:

i) Take reasonable, diligent and appropriate steps to maintain the security of
communication of Practice Information between it and Athena and to maintain the
security, availability and integrity of Practice Information in its possession
or control;

ii) Use any Practice Information only as necessary to provide the Services;

iii) Not disclose Practice Information to any individual or entity except to
Athena in connection with performance of this Agreement or to the medical
practice that is the source of such Practice Information;

iv) Not use or further disclose Practice Information in a manner that would
violate those reasonable contract terms between Athena and its customer
practices that are provided to Vision from time to time by Athena -in writing or
to knowingly cause Athena to violate such contract terms;

v) Not use or further disclose Practice Information in a manner that would
violate any federal, state or local law or regulation if done by Athena; and,

vi) Make reasonable efforts when using or disclosing Practice Information under
this Agreement to limit the information used to the minimum amount necessary to
accomplish the purpose intended under this Agreement.

g) Notwithstanding the foregoing, Vision and Healthsource, to the extent that
Vision subcontracts with it to perform some or all of the Services, may use
Practice Information internally for their own proper management and
administration, including but not limited to maintenance and enforcement of an
appropriate Compliance Plan under Section 5 above.

h) All steps and actions taken and procedures followed by Vision and
Healthsource with respect to security, use, and disclosure of Practice
Information will comply fully with all applicable provisions of any United
States Federal, state or local law regarding confidentiality of financial or
medical information.

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i) Vision and Healthsource will implement reasonable and appropriate
administrative, technical and physical safeguards to prevent the use or
disclosure of Practice Information other than as expressly permitted by this
Agreement. Vision and Healthsource will cooperate fully with Athena and with
each Athena customer as requested in implementation by them of programs,
policies and procedures designed to assure compliance with relevant privacy and
security laws and with contractual privacy and security obligations to which
Athena or the customer may be bound.

j) Vision and Healthsource, to the extent that Vision subcontracts with it to
perform some or all of the Services, will each require in writing that all of
its personnel adhere to the requirements in these provisions; and, upon request,
will provide Athena with reasonable assurances that each of them has and will
meet the requirements in these provisions. Vision and Healthsource will each
make its internal practices, books and records relating to the use and
disclosure of Practice Information and relating to its Compliance Program
sufficiently available to Athena upon Athena's reasonable written request to
permit Athena to confirm their compliance with the terms of this Section 7 of
the Agreement. Upon reasonable request of Athena, Vision and Healthsource will
provide access by Athena personnel to facilities at which Practice Information
is kept or processed to permit evaluation by Athena of compliance by Vision and
Healthsource with this Section 7 of the Agreement.

k) Upon termination of Services under this Agreement for any reason, except as
otherwise may be reasonably required under this Agreement (including but not
limited to the provision of transition services), Vision and Healthsource will
each immediately cease any and all use of all Confidential Information,
including but not limited to, all Practice Information, and will immediately
return all such information in its possession to Athena.

l) Vision and Healthsource will each promptly report to Athena any use or
disclosure of Practice Information contrary to or not as provided for in this
Agreement and any such use or disclosure that it believes is imminent or is
likely to have occurred.

m) Vision and Healthsource will each make available all Practice Information as
may be required of it or of Athena by applicable regulations promulgated
pursuant to HIPAA and will each make its internal practices, books and records
relating to the use and disclosure of Practice Information available as required
of it or of Athena under any regulation promulgated pursuant to HIPAA.

n) To the extent required by law, Vision and Healthsource will each make
available to Athena or to a practice customer of Athena any Practice Information
of that practice in its possession or control within 5 days of request by Athena
or by the practice for access to that Practice Information. Vision and
Healthsource will each, within 5 days of request by Athena or by a practice
customer of Athena, provide for amendment of that practice's Practice
Information in its possession or control and incorporate any amendment into such
Practice Information in its possession or control to the extent legally
permissible. Vision and Healthsource will each, within 5 days of request by
Athena or by a practice customer of Athena make available to Athena or the
practice such information as in its possession or control that it reasonably
necessary or required for Athena or the practice to account for all disclosures
of Practice Information, to the extent required by law.

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o) Vision and Healthsource will each make its internal practices, books and
records relating to the use and disclosure of Practice Information available to
the Secretary of the Department of Health and Human Services of the United
States to the extent required by 45 C.F.R. Section 164, as amended from time to
time.

p) Each Party acknowledges and agrees that due to the unique nature of the
Confidential Information, including, but not limited to, Practice Information,
money damages alone cannot adequately remedy any breach of obligations under
this Agreement to keep such information confidential and secure and that any
such breach of those obligations will result in irreparable harm to the Party to
which the obligation of security and confidentiality is owed. The Parties
therefore agree that upon any such breach or any threat thereof, the aggrieved
Party will be entitled to appropriate equitable relief in the form of injunction
or court order, in addition to whatever remedies for damages it might have at
law. The provisions of this Section 7p) will apply only to obligations of
confidentiality and security under Section 7 of this Agreement.

8) Representations, Warranties and Covenants of Athena. Athena represents and
warrants to Vision that:

a) Neither Athena nor its agents nor to its knowledge its customers with respect
to which Vision will provide Services: a) has been convicted of a federal health
care crime; b) has been excluded from participation in any federal health care
program; or c) is currently under investigation or involved in any legal
proceeding which may lead to such a conviction or exclusion. Athena will notify
Vision immediately if any of the foregoing occur whereupon Vision will have the
right to immediate terminate this Agreement immediately (in the event that
Athena or its agents are convicted, excluded) or to cease or suspend the
provision of services to the particular customer as otherwise provided for in
this Agreement (in the event that an Athena customer is convicted or excluded),
provided that right to such termination, cessation or suspension will be
exercised if at all within 60 days of such notice.

b) It will implement an effective compliance plan that is consistent with the
standards set forth in the U.S. Sentencing Guidelines and the Office of
Inspector General's Compliance Program Guide for third-party medical billing
companies within thirty (30) days after the Agreement takes effect and will
maintain such an effective compliance plan at all times throughout the course of
this Agreement. Upon request, a copy of its compliance plan will be provided to
Vision, on condition that it is treated as Confidential Information under
Section 7(c).

c) (i) It has all requisite corporate power and authority to execute, deliver
and perform its obligations under this Agreement, including authority from all
clients or customers for which services will be furnished under this Agreement,
(ii) the execution, delivery and performance of this Agreement has been duly
authorized by it, and (iii) no approval, authorization or consent of any
governmental or regulatory authority is required to be obtained by it or made in
order for it to enter into and perform its obligations under this Agreement.

d) On a continuing basis throughout the term of this Agreement, Athena shall not
knowingly or as a result of gross negligence permit any media, data (including
data necessary for the Services) or software provided by it to Vision to contain
any code, virus or other mechanism to disable, adversely affect, harm, or grant
unauthorized access or use to Athena systems, equipment or

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data. Athena shall promptly notify Vision of any such code, virus or mechanism
upon its discovery by Athena.

9) Representations and Warranties and Covenants of Vision.. Vision represents
and warrants to Athena that:

a) Neither Vision nor its agents or subcontractors: a) has been convicted of a
federal health care crime; b) has been excluded from participation in any
federal health care programs; or c) is currently under investigation or involved
in any legal proceeding which may lead to such a conviction or exclusion. Vision
will notify Athena immediately if any of the foregoing occur whereupon Athena
will have the right to terminate this Agreement immediately in the event that
Vision or its agents or subcontractors are convicted or excluded provided that
right to such termination, will be exercised if at all within 60 days of such
notice.

b) It has a compliance plan that is effective and consistent with the standards
set forth in the U.S. Sentencing Guidelines and the Office of Inspector
General's Compliance Program Guide for third-party medical billing companies and
will maintain it as such at all times in the course of this Agreement. Upon
request, a copy of its compliance plan will be provided to Athena, on condition
that it is treated as Confidential Information under Section 7 (c).

c) On a continuing basis throughout the term of this Agreement, Vision shall not
knowingly or as a result of gross negligence permit any media, data or software
provided by it to Athena to contain any code, virus or other mechanism to
disable, adversely affect, harm, or grant unauthorized access or use to Athena
systems, equipment or data. Vision shall promptly notify Athena of any such
code, virus or mechanism upon its discovery by Vision.

d) On a continuing basis throughout the term of this Agreement that no software
provided by Vision to Athena infringes on any applicable, valid intellectual
property right under laws of the United States or any of its states or under the
laws of India or its states or political subdivisions, provided that Vision
makes no warranty with respect to the possibility of such infringement to the
extent that it results from use of such software only in combination or
conjunction with any data, software or equipment provided to Athena.

e) On a continuing basis throughout the term of this Agreement that no software
provided by Vision to Athena or used by it with respect to performance of the
Services violates any applicable law or regulation of the United States or any
of its states or under the laws of India or its states or political subdivisions
regarding export or import of software, technology or encrypted data, including,
but not limited to, encryption software, and that all necessary governmental
permits, licenses and approvals have been obtained and will be maintained to
permit performance of the Services as contemplated in this Agreement.

f) On a continuing basis throughout the term of this Agreement, that the
encryption software provided by it to Athena for use in connection with the
Services and used by Vision in connection with the Services complies
substantially with the encryption requirements set forth in HCFA Internet
Security Policy issued November 24, 1998, as it may be amended or updated from
time to time, and provides encryption protection equal to or exceeding 128 bit
encryption.

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g) (i) It has all requisite corporate power and authority to execute, deliver
and perform its obligations under this Agreement, (ii) the execution, delivery
and performance of this Agreement has been duly authorized by it, and (iii) no
approval, authorization or consent of any governmental or regulatory authority
is required to be obtained by it or made in order for it to enter into and
perform its obligations under this Agreement.

10) Representations and Warranties of Healthsource. Healthsource represents and
warrants to Athena that:

a) Neither Healthsource nor its agents or subcontractors: a) has been convicted
of a federal health care crime; b) has been excluded from participation in any
federal health care programs; or c) is currently under investigation or involved
in any legal proceeding which may lead to such a conviction or exclusion.
Healthsource will notify Athena immediately if any of the foregoing occur,
whereupon Athena will have the right to terminate this Agreement immediately in
the event that Vision or its agents or subcontractors are convicted or excluded
provided that right to such termination, cessation or suspension will be
exercised if at all within 60 days of such notice.

b) It has a compliance plan that is effective and consistent with the standards
set forth in the U.S. Sentencing Guidelines and the Office of Inspector
General's Compliance Program Guide for third-party medical billing companies and
that it will maintain it as such at all times during the term of the Agreement.
Upon request, a copy of its compliance plan will be provided to Athena, on
condition that it is treated as Confidential Information under Section 7 (c).

c) On a continuing basis throughout the term of this Agreement, Healthsource
shall not knowingly or as a result of gross negligence permit any media, data or
software provided by Healthsource to Athena to contain any code, virus or other
mechanism to disable, adversely affect, harm, or grant unauthorized access or
use to Athena systems, equipment or data. Healthsource shall promptly notify
Athena of any such code, virus or mechanism upon its discovery by Healthsource.

d) On a continuing basis throughout the term of this Agreement that no software
provided by Healthsource to Athena infringes on any applicable, valid
intellectual property right under laws of the United States or any of its states
or under the laws of India or its states or political subdivisions, provided
that Healthsource makes no warranty with respect to the possibility of such
infringement to the extent that it results from use of such software only in
combination or conjunction with any data, software or equipment provided to
Athena.

e) On a continuing basis throughout the term of this Agreement, no software
provided by Healthsource to Athena or used by it with respect to performance of
the Services violates any applicable law or regulation of the United States or
any of its states or under of India or its states or political subdivisions
regarding export or import of software, technology or encrypted data, including
but not limited to encryption software, and that all necessary governmental
permits, licenses and approvals have been obtained and will be maintained to
permit performance of the Services as contemplated in this Agreement.

f) On a continuing basis throughout the term of the Agreement, the encryption
software provided by Healthsource to Athena for use in connection with the
Services and used by Healthsource in

<PAGE>

connection with the Services complies substantially with the encryption
requirements set forth in HCFA Internet Security Policy issued November 24,
1998, as it may be amended or updated from time to time, and provides encryption
protection equal to or exceeding 128 bit encryption.

g) (i) It has all requisite corporate power and authority to execute, deliver
and perform its obligations under this Agreement, (ii) the execution, delivery
and performance of this Agreement has been duly authorized by it, and (iii) no
approval, authorization or consent of any governmental or regulatory authority
is required to be obtained by it or made in order for it to enter into and
perform its obligations under this Agreement.

11) Warranty Disclaimer.

EXCEPT AS EXPRESSLY PROVIDED IN THIS AGREEMENT: (a) NO PARTY MAKES NOR WILL BE
DEEMED TO MAKE OR HAVE MADE ANY REPRESENTATIONS OR WARRANTIES OF ANY KIND OR
NATURE, DIRECTLY OR INDIRECTLY, WHETHER EXPRESS OR IMPLIED (EITHER IN FACT OR BY
OPERATION OF LAW) WITH RESPECT TO ANY SERVICE OR GOOD PROVIDED HEREUNDER; AND,
(b) EACH PARTY EXPRESSLY DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY, TITLE,
DESIGN, OPERATION OR FITNESS FOR A PARTICULAR PURPOSE AND ALL WARRANTIES ARISING
FROM CONDUCT, COURSE OF DEALING OR CUSTOM OR USAGE IN TRADE.

EXCEPT AS EXPLICITLY PROVIDED IN THIS AGREEMENT, THE SERVICES ARE PROVIDED TO
ATHENA "AS IS."

12) Limitations of Liability.

a) EXCEPT WITH RESPECT TO THE OBLIGATIONS, UNDERTAKINGS AND WARRANTIES SET FORTH
IN SECTIONS 5 THROUGH 10, ABOVE, IN NO EVENT WILL ANY PARTY BE LIABLE UNDER THIS
AGREEMENT TO ANOTHER PARTY, OR TO ANY THIRD PARTY, FOR CONSEQUENTIAL, EXEMPLARY,
INDIRECT, SPECIAL OR INCIDENTAL DAMAGES. IN NO EVENT WILL ANY PARTY BE LIABLE
UNDER THIS AGREEMENT TO ANOTHER PARTY, OR TO ANY THIRD PARTY, FOR LOST PROFITS,
BUSINESS OR BUSINESS OPPORTUNITIES OR REVENUE, EVEN IF THE PARTY OTHERWISE
LIABLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

b) No Party will be responsible under this Agreement for any delay, error, lost
data, failure to perform, interruption, or disruption in the Services or
disclosure of data caused by or resulting from any natural fire; severe weather;
earthquake; flood or other natural disaster or act of God or any power failure;
failure of the world wide web, an Internet Service Provider utilized by either
of the parties, the internet or other non-proprietary means on communication /
connectivity utilized in connection with the Services, or hacking or electronic
vandalism, or other unavailability of the means of electronic communication
between the parties for the provision of information relating to or in
connection with the Services; legal act of a public authority, strike, lockout,
riot or act of war if such cause is beyond the reasonable control of the Party
otherwise chargeable and that Party has otherwise acted with reasonable care and
in conformity with this

<PAGE>

Agreement with respect to such cause and, with respect to any disclosure,
corruption or unavailability of data, has adopted reasonable, diligent and
appropriate steps to maintain the security of its communications and facilities
and to maintain the security, availability and integrity of Practice Information
in its possession or control, or as to Vision and Healthsource only, a breach by
Athena of its warranty under Section 8 d) or, as to Athena only, a breach by
Vision of its warranty under Section 9 e). Notwithstanding the foregoing, such
cause will not include a Party's lack of funds, lack of credit, or other
financial inability to perform. If Vision or Healthsource intends to rely on any
of the foregoing conditions to forgive its performance or lack of performance
under this Agreement, it will timely so notify Athena in order to permit Athena
in its sole discretion to suspend or curtail its own performance under this
Agreement for such time as the condition continues and if such condition
continues for 7 business days or more, Athena may terminate the Agreement upon
notice to the other party provided that it provides such notice if at all within
10 days of notification of reliance by Vision or Healthsource and provided that
the termination will be effective on the date specified in the notice of
termination, which shall not be less than 180 days after provision of the
notice.

13) Indemnification.

a) Vision will defend, indemnify, and hold Athena and its directors, officers,
employees, agents, shareholders, partners and representatives harmless from and
against any claims, losses, actions, demands, liabilities or damages, including
reasonable attorneys' fees, (collectively "Losses") resulting from (i) the gross
negligence or willful misconduct of Vision or any subcontractor of Vision or
(ii) the breach by Vision or any subcontractor of Vision of any material
provision of this Agreement.

b) Athena will defend, indemnify, and hold Vision and Healthsource and their
directors, officers, employees, agents, shareholders, partners and
representatives, harmless from and against any Losses resulting from (i)
Athena's failure (to the extent not resulting from the acts or omissions of
Vision or any subcontractor of Vision) to provide services or products to Athena
customers, (ii) any alleged defect or deficiency in any services or products
provided by Athena to its customers (to the extent not resulting from the acts
or omissions of Vision or any subcontractor of Vision), (iii) any action duly
taken by Vision in conformity with this Agreement, without error or defect by
Vision and at the written request or instruction of Athena, or (iv) the breach
by Athena or any subcontractor of Athena of any material provision of this
Agreement.

c) A Party or person seeking indemnification under Sections 13 a) or 13 b) will
give written notice to the indemnifying Party promptly upon being informed of
any event that could reasonably expected to give rise to a claim or the
commencement (or threatened commencement) of any action, proceeding or
investigation that may constitute or result in a Loss. Such notice will describe
the event in reasonable detail and will, if possible, indicate the amount of
Loss that has been or may be suffered. In no event will an Indemnitee's failure
to give such a notice relieve the indemnifying Party of any liability, except to
the extent that such failure materially prejudices the indemnifying Party's
ability to adequately defend such claim. If the indemnifying Party confirms in
writing that it is obligated hereunder to indemnify the Indemnitee with respect
to any Loss, the Indemnifying Party may elect to compromise or defend such Loss,
at its own expense and with counsel reasonably satisfactory to the Indemnitee.
If the indemnifying Party elects to so compromise or defend such Loss, it will
within 10 days (or sooner, if the nature of the Loss so

<PAGE>

requires) notify the Indemnitee of its intent to do so. Upon such notification,
the indemnifying Party will have the right to control the defense of such Loss,
and the Indemnitee will cooperate with the Indemnifying Party in the compromise
of, or defense against, such Loss. If the Indemnifying Party elects not to
compromise or defend such Asserted Liability, fails to notify the Indemnitee of
its election as herein provided or contests its obligation to indemnify under
this Agreement, the Indemnitee may pay, compromise or defend such Asserted
Liability, and the Indemnitee will have the right to control the compromise or
defense of such Loss; and in such case, the Indemnitee will retain the right to
pursue its right to indemnification hereunder against the indemnifying Party.
Notwithstanding the foregoing provisions of this Section 13 c), the indemnifying
Party may settle or compromise any Loss; provided, (i) such settlement or
compromise does not result in any liability to, restriction on or admission by
the Indemnitee; and (ii) such settlement or compromise constitutes or includes a
full release of the Indemnitee. In any event, the Indemnitee may participate, at
its own expense, in the defense of any Loss. If the indemnifying Party chooses
to defend any Loss, the Indemnitee will make available to the Indemnifying Party
any books, records or other documents within its control that are necessary or
appropriate for such defense.

14) Miscellaneous

a) Notices. All notices permitted or required to be given under this Agreement
will be in writing and delivered to the parties at their respective addresses
set forth below by (i) hand delivery, (ii) nationally recognized overnight
courier, (iii) first class mail, postage prepaid, OR (iv) facsimile transmission
followed by any one of the methods stated above, and will be deemed to be
effective the day of delivery by hand or overnight courier, the day of
transmission if sent by facsimile, or three days after mailing if sent by mail:

          If to Athena:         athenahealth, Inc.
                                One Moody Street
                                Waltham, MA 02453
                                Attn: President
                                Tel: 781 642 8800
                                Fax: 781 642 8899

          If to Vision:         Vision Healthsource, Inc.
                                8000 Towers Crescent Drive
                                Vienna, VA 22182
                                Attn: Vardhman Jain, President
                                Telephone: (703) 847-3680
                                Facsimile. (703) 920-3859

          If to Healthsource:   Vision Healthsource India Private Ltd.
                                c/o Vision Healthsource, Inc.
                                8000 Towers Crescent Drive
                                Vienna, VA 22182
                                Attn: Vardhman Jain, President
                                Facsimile: (703) 920-3859

<PAGE>

b) Counterparts. This Agreement may be executed in three (3) counterparts, each
of which will be treated as an original.

c) Relationship of Parties. The Parties expressly acknowledge that Vision and
Athena are independent contractors and nothing in this Agreement is intended nor
will be construed to create an employer/employee, joint venture, agency or
partnership relationship.

d) Waiver. The failure any Party to insist in any one or more instances upon the
strict performance of any of the terms or provisions of this Agreement by
another Party will not be construed as a waiver or relinquishment for the future
of any such term or provisions, but the same will continue in full force and
effect.

e) Assignments. This Agreement will be binding upon and inure to the benefit of
the subsidiaries, affiliates, successors and permitted assigns of the Parties to
this Agreement, provided that successors and assigns shall be governed by the
provisions of this Section 14 e) which follow. Except as stated in Section 1 b)
above, no Party may transfer, or otherwise assign this Agreement or any of its
rights or obligations hereunder without the other Party's prior written consent,
which consent will not be unreasonably withheld. Notwithstanding the foregoing,
a Party may assign this Agreement or its rights and obligations hereunder by
merger or otherwise in whole or in part, without the consent of the other
Parties, to any entity controlled by, controlling or under common control with
it or to any entity which acquires (by merger, consolidation, stock or
otherwise) all or substantially all of the assets of such party.

f) Entire Agreement, Amendment. This Agreement together with all exhibits hereto
constitutes the entire Agreement between the Parties hereto with respect to the
subject matter of this Agreement. This Agreement supersedes any and all
agreements, either oral or written, between the Parties to this Agreement with
respect to the subject matter of this Agreement. Except as otherwise expressly
provided herein, this Agreement will not be modified in any manner except by an
instrument in writing duly executed by an authorized representative of each
Party.

g) Governing Law, Forum. This Agreement will be governed by and construed in
accordance with the laws of the Commonwealth of Delaware, exclusive of its
conflict of law principles. The federal district court and the state courts in
the State of Delaware will be the exclusive venue for any court proceedings
between the Parties arising out of or in connection with this Agreement, and the
Parties hereby submit to the jurisdiction of those courts for that purpose.

h) Jurisdiction. The federal district court and the state courts in the State of
Delaware will be the exclusive venue for any court proceedings between it and
Athena arising out of or in connection with the Agreement. Healthsource hereby
submits to the jurisdiction of those courts for that purpose and irrevocably
appoints Vision as its agent to receive service of any process in connection
with any and all proceedings before those courts in connection with this
Agreement.

i) Third Party Beneficiaries. Clients and/or customers of Athena as to whom
Vision provides Services hereunder are not third party beneficiaries to this
Agreement.

IN WITNESS WHEREOF, the parties hereto have hereunto set their respective hands,
all as of the day and year first above written.

<PAGE>

VISION HEALTHSOURCE, INC.

By: /s/ Vardhman Jain
    ---------------------------------
    Vardhman Jain, President

ATHENAHEALTH, INC.

By: /s/ Anil Sitole
    ---------------------------------
    Anil Sitole, President

VISION HEALTHSOURCE INDIA PRIVATE LTD.

By: /s/ Vardham Jain
    ---------------------------------
    Vardham Jain, President

<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

                                    EXHIBIT A

                              PRICING AND SERVICES

This Pricing and Services Exhibit is attached to and made a part of the
Agreement (the "Agreement") among athenahealth, Inc. ("Athena"), Vision
Healthsource, Inc. ("Vision") and Vision Healthsource India Private Ltd.
("Healthsource") and is subject to the terms and conditions of the Agreement. In
the event of any conflict between the provisions of the Agreement and the
provisions of this Exhibit A, the provisions of Exhibit A shall govern; provided
that nothing in this Exhibit A shall alter the terms of Sections 12 a) or 12 b)
of the Agreement. Capitalized terms not otherwise defined herein will have the
meaning given them in the Agreement.

1) Pricing

a) General. In return for the provision of the Services described in this
Exhibit, Athena will pay Vision a monthly fee (pro-rated for any partial month)
of the greater of: 1) the actual number of charges posted by Vision in the month
multiplied by the unit price, reflecting the applicable Service Level as set
forth in the chart immediately below or 2) the Monthly Price Floor for the month
as defined in subsection (b) below.

<TABLE>
<CAPTION>
                                   Unit Price per charge     Unit Price per charge posted
Number of Charges                posted subject to Service        subject to Service
posted per month                  Level 1 as defined below     Level 2 as defined below
-----------------                -------------------------   ----------------------------
<S>                              <C>                         <C>
0 - 125,000 Charges                         $*                            $*
125,001 - 250,000 Charges                   $*                            $*
250,001 - 500,000 Charges                   $*                            $*
500,001 - 1,000,000Charges                  $*                            $*
Greater than 1,000,000 Charges              $*                            $*
</TABLE>

b) Monthly Price Floor. Except as provided in subsection (c) below, the Monthly
Price Floor for a given month (Month A) will be the greater of the following
four amounts: (i) 75% of the actual charge volume for the immediately preceding
month (Month A Minus One) times the relevant Unit Prices in the chart above
applied to the service level specified for each customer for Month A Minus One
as set forth below; (ii) 50% of the actual charge volume for the month
immediately before the preceding month (Month A minus two) times the relevant
Unit Prices in the chart above applied to the service level specified for each
customer for Month A Minus 2 as set forth below; (iii) 25% of the actual charge
volume for the month immediately preceding the month before the preceding month
(Month A Minus Three) times the relevant Unit Prices in the chart above applied
to the service level specified for each customer for Month A Minus Three as set
forth below; or (iv) 75% of the Monthly Estimated Charge Volume (as defined
below) times the relevant Unit Prices in the chart above applied to the service
level specified for each customer for Month A as set forth below.

c) Monthly Price Floor After Notice of Termination,. If the Agreement is
terminated by Athena not for cause under Section 3(c) of the Agreement, then
notwithstanding the provisions of

<PAGE>

subsection (b) above, the Monthly Price Floor in the month immediately following
notice of termination will be the same as the Monthly Price Floor in the month
preceding the termination notice and the Monthly Price Floor for each succeeding
month will be reduced by a cumulative additional increment of 25% of that
original figure until it is zero. By way of example and not by way of
limitation, if notice of termination is given at the end of March, the Monthly
Price Floor for April will the same as that in March, the Monthly Price Floor
for May will be 75% of the March figure, the Monthly Price Floor for June will
be 50% of the March figure, the Monthly Price Floor for July will be 25% of the
March figure and the Monthly Price Floor for August and thereafter will be zero.
Notwithstanding the foregoing, the Monthly Price Floor in any month in which
this Agreement terminates before the end of the month will be prorated to the
portion of the month that precedes the termination. If Athena terminates the
Agreement for cause or if Vision terminates the Agreement not for cause, then
the Monthly Price Floor will be zero for all Services provided after the date of
the termination notice.

d) Monthly Estimated Charge Volume,. On or before the seventh business day of
each calendar month, Athena will provide to Vision in writing a rolling three
(3) month volume forecast of the number of providers and charges it expects for
each of the three months included in the forecast. That volume forecast may be
changed and amended by Athena at any time provided that the portion of that
volume forecast for the next following month will be termed the "Monthly
Estimated Charge Volume" and will not be changed or amended following the end of
the seventh business day of the month preceding the month to which it applies.
Athena will also provide to Vision a written specification by customer, at least
two (2) months in advance, of the Service Level under which each customer's
charges will be processed in a given month.

2) Services.

a) Vision will provide payment posting services whereby records of charges,
consisting of line items for which payment is sought in claims, will be matched
against payment and denial data on explanations of benefit ("EOB") and other
documentation. Data will then be entered to complete agreed formats (that are
consistent with formats in use between the Parties prior to this Agreement and
any that are mutually established subsequently), to record EOB data against each
appropriate charge. Both the claims data and the EOB documentation will be
provided by Athena in electronic form using an agreed upon data transfer
protocol in agreed formats, consistent with formats in use between the Parties
prior to this Agreement. Vision will perform its work on a semi-on line model,
which model requires Vision to employ an offline application to accept both
claims data and the entered matched data. The completed data from the
application will then be provided to Athena using an agreed data transfer
protocol in a format specified by Athena (consistent with formats in use between
the Parties prior to this Agreement) suitable to be imported back into Athena's
billing system.

b) Vision will cooperate with Athena in establishing necessary protocols for
communicating necessary data to and from Vision via the Internet or any protocol
acceptable to both parties, enabling the matched information to be entered in
the database of Athena located at Athena's offices.

<PAGE>

c) Vision will make available on a daily basis to Athena, in writing or
electronic format, the following reports consistent with the report formats in
use between the Parties prior to this Agreement:

i.   Batches Receipt Confirmation Report;

ii.  Data Entry Completion Report; and

iii. Problem Report.

d) Vision will provide training to the staff of Athena so that such staff is
knowledgeable in the methods needed to be put into place for the services of
Vision to be performed successfully and both parties will make personnel
available at a time mutually agreeable to both parties.

e) Vision will pay for all materials and supplies required in the performance of
its obligations under this Agreement. In addition, Vision will provide for the
development that Vision and Athena mutually deem necessary for the proper
tracking of the data being transferred to Vision's facility.

f) Vision will perform regular reviews of the work it performs and has performed
for Athena under this Agreement to confirm the accuracy of such work. In the
event that Vision discovers any compliance problem in the course of such
reviews, the matter will be subject to Paragraph 2 (i) immediately below and
Vision will take appropriate corrective measures it deems required in accordance
with Vision's compliance plan. Vision will promptly notify Athena of any such
compliance problem and of the measures taken.

g) Vision and Healthsource will cooperate fully with Athena in defending any
audit, lawsuit, or recoupment action by any patient or third-party payer by
providing documentation, information and testimony as reasonably required
consistent with advice from their legal counsel. Athena will compensate Vision
and Healthsource for the time and effort of Vision and of Healthsource in such
cooperation at reasonable rates, provided that such rates are not greater than
Vision's and Healthsource's regular charges for the time and expenses of
applicable personnel in the ordinary course of their businesses and provided
that Athena will not compensate Vision or Healthsource for their cooperation in
the foregoing audits, lawsuits or recoupment actions if such audits, lawsuits or
recoupment actions are materially caused by acts or omissions of Vision or
Healthsource.

h) Athena will cooperate fully with Vision and Healthsource in defending any
audit, lawsuit, or recoupment action by any patient or third-party payer by
providing documentation, information and testimony as reasonably required
consistent with advice from its legal counsel. Vision and Healthsource will
compensate Athena for the time and effort of Athena in such cooperation at
reasonable rates, provided that such rates are not greater than Athena's regular
charges for the time and expenses of applicable personnel in the ordinary course
of its business and provided that Vision and Healthsource will not compensate
Athena for its cooperation in the foregoing audits, lawsuits or recoupment
actions if such audits, lawsuits or recoupment actions are materially caused by
acts or omissions of Athena.

<PAGE>

i) Vision will notify Athena promptly if it discovers credible evidence that
data or documentation furnished to it as to any Athena customer or client is
materially inaccurate or may otherwise result in overpayment to such customer or
client. In addition to any other right that Vision may have under this
Agreement, Vision may suspend the provision of services for any client or
customer of Athena upon its discovery of creditable evidence that the data or
documentation furnished to Vision for such customer or client may result in a
potential regulatory non-compliance, provided that Vision will promptly enter
discussion with Athena to confirm whether or not the actions will result in
regulatory non-compliance and to determine in good faith the measures that can
be taken, of any, to avoid such situation in the future; and, Vision will
promptly resume the provision of services with respect to the client or customer
if the actions precipitating the suspension of services will not result in
regulatory non-compliance or if in the exercise of good faith Vision reasonably
determines that such actions have been corrected and are unlikely to be repeated
in the future.

3) Athena Responsibilities. Athena is responsible for the delivery of legibly
scanned electronic files, electronically legible data and all other necessary
practice data to permit posting (in a format that is consistent with format in
use between the Parties prior to this Agreement and any that are mutually
established subsequently) at Athena's sole cost and expense. Vision's
obligations to perform the Services is conditioned upon provision by Athena of
data in reasonable form and substance to permit performance of the Services as
described in this Agreement; and, Athena is responsible for the substance of all
information it provides to Vision, except to the extent that such substance is
altered by Vision.

4) Service Standards. Vision will perform the services in accordance with the
standards set forth below. The invoice adjustments set forth below shall be
applied in the event that these standards are not met. All such adjustments will
be clearly labeled as such on the relevant invoice. Such invoice adjustment will
be the exclusive monetary remedy of Athena with respect to violation of such
standards, except if Vision fails to correct known, material posting errors
promptly or if Athena notifies Vision of Athena's waiver of an adjustment in
connection with a failure to meet such standards not later than ten (10)
business days after receipt of the relevant invoice containing the adjustment
and provided that such limitation of remedy will not apply in the event that a
breach or default is part of a persistent or recurring pattern of failure to
meet such standards and Athena has notified Vision of such persistent or
recurring pattern, listing the events that constitute the pattern.

a) Service Levels.

i) Posting Completion. Data for posting provided by Athena under this Agreement
will be processed by Vision (or by Healthsource to the extent that Vision
subcontracts with it to perform some or all of the Services) under one of two
Service Levels. Service Level I requires Vision to complete 95% of charge
postings within 12 hours of receipt and 99% of charge postings within 36 hours
of receipt. Service Level 2 requires Vision to complete 95% of charge postings
within 36 hours of receipt and 99% within 60 hours of receipt. All references to
"receipt" are to actual receipt by Vision of all required information in a
manner that conforms to the specifications of this Agreement. The drop-off time
will be 9:00 p.m. eastern standard time for Athena to have files ready for pick
up (electronically) by Vision and 9:00 am eastern standard time for Vision to
drop-off (electronically) the completed (i.e. posted) file to Athena.

<PAGE>

ii) Daily Volume. Service Levels will be applied to the number of charges
received by Vision from Athena on a (U.S.) daily basis up to a maximum of the
Estimated Charge Volume for the relevant month (as specified in Athena's
designation of Service Level by customer associated with that Estimated Charge
Volume for that month) divided by the number of weekdays in that month exclusive
of United States Federal Holidays, plus 30% (20% for claims subject to Service
Level 1). Any charges in excess of this maximum will be counted first in the
charges to which the relevant Service Level will be applied in the daily maximum
of the next day.

iii) Invoice Adjustment. If Vision fails with respect to the charges received by
it for posting in a given (U.S.) day to meet the Service Level as applied to
those charges as specified in Athena's designation of Service Level by customer
associated with that Estimated Charge Volume for the relevant month, Vision will
credit to Athena for that month an amount equal to the number of charges
received that day (as defined in the "daily volume") times the relevant unit
charges times 0.25 and will provide an additional credit of the same amount for
each additional 24 hour period in which the relevant Service Level remains unmet
with respect to such charges.

b) Accuracy of Posting. Without limitation of Athena's remedy as otherwise
provided in this Agreement, Vision will promptly correct any material posting
errors or deficiencies in its posting process of which it is notified by Athena.
A material posting error shall be a posting error by Vision that causes a
materially inaccurate record to be produced or that results in a compliance
problem. Without limitation, missing, incomplete or incorrect claim or charge
information, claim ID number, date of service, code, amount billed, payment,
transfer, adjustment or kick-code as compared against the data originally
provided by Athena, will be considered a material error. Posting operations that
are not completed because of illegible, missing or incomplete information in the
data provided by Athena or that are otherwise attributable to a failure of
Athena to comply with this Agreement will not be considered material errors if
proper electronic notation is made by Vision of the issue in the data as posted
or otherwise promptly called to the attention of Athena in writing. In the event
a notification of a posting error is disputed in good faith by Vision, notice
will promptly be provided to Athena by email to the Communication Contact
identified in Section 1d) and the parties will promptly work, through their
respective Communication Contacts, to resolve the dispute in good faith,
provided that this process will not relieve Vision from the obligation in the
first sentence in this paragraph.

i) General Sampling. Athena may from time to time sample the accuracy of the
Services by reviewing a monthly sample of not less than 200 of the charges
posted for the month. The sample will not be focused by charge type, EOB data
type, region, poster or customer, but may in Athena's discretion be focused by
date and, without limitation, a sample chosen on the basis of 3 or more days in
the month, will be sufficient to be a general sample.

ii) Focused Sampling. In response to customer complaints or issues or where
Athena has a good faith reason to believe that posting accuracy is not meeting
standards in particular respects, Athena may also in its discretion review
focused samples on a monthly basis of charges by region, customer, charge type,
EOB data type, or poster or such other reasonable focused criteria as Athena may
employ.

iii) Errors. In the event that sampling by Athena discloses an error rate of
more than 5%, Athena will notify Vision in writing or by e-mail including
explanation of its findings sufficient for

<PAGE>

verification by Vision, and Vision and Athena will discuss the results and the
manner in which Vision will correct any deficiencies. The Parties will also
discuss in good faith whether and how additional sampling should be performed to
verify sample results.

iv) Sampling to Establish Error Rate in Event of Disputed Deficiency. Within 30
days of the execution of this Agreement, the Vision and Athena will establish
mutually agreed protocols for monthly general and focused sampling that will be
reduced to writing, signed and attached to this Exhibit A. Until Vision and
Athena agree upon such protocols, sampling that selects a statistically valid,
random sample within the established category of sample items for the
established time period will be deemed to be the accepted protocols. If Vision
disputes a deficiency in error rate then it must so notify Athena within 10 days
of after it receives notice of the deficiency. In the event of such dispute,
Vision and Athena will each be entitled to present to the other within the next
10 days a single sample meeting the protocols, together with detailed
information to permit verification by the other of the manner in which the
sample was selected; and, the error rate for the applicable period will be the
average between the two error rates of such samples, provided that if only one
sample meeting the protocols is presented within those ten days, then the error
rate in that sample will control.

v) Invoice Adjustment. If the posting error rate in any general or focused
sample as determined pursuant to this Section 5(b) exceeds 5%, then in addition
to correction of the posting errors identified Vision will credit to Athena for
that month an amount equal to the percentage difference between the error rate
and 5%, times the applicable Error Factor (as defined below) times (in the case
of error disclosed in a general sample, including but not limited to a sample
showing an error rate in any three or more days in the month) the total Vision
charges assessed in that month or times (in the case of a focused sample) the
total Vision charges for posting of the type reviewed in the sample. The Error
Factor will be calculated as follows: if the error rate all general and focused
samples relating to a month are less than 7% then the Error Factor for the month
will be 2; if the error rate established by either general or focused sample is
equal to or greater than 7%, but no error rate established by any sample is
equal to or greater than 9% then the Error Factor for the month will be 5; if
any sample establishes an error rate equal to or greater than 9%, then the Error
Factor for the month will be 10.

5) Re-evaluation of Volume Levels. Quality Guidelines and Associated Price
Adjustments. No later than January 31, 2003 the Parties will initiate and
conduct discussions in good faith and with reasonable promptness to reassess the
accuracy and methodology of estimation of volume levels and error and lateness
rates as set forth in Sections 4(a) and (b) of this Exhibit A in light of the
experience of the Parties under this Agreement to that date. During those
discussions, the Parties will attempt in good faith to reach additional
agreement on amended levels for the Monthly Price Floor, invoice adjustments in
the event of failure to meet volume requirements, sampling for errors and
invoice adjustments based upon such sampling and also to agree upon any change
in or addition to the methodology of calculations set forth in this Exhibit A
that such amendment reasonably entails. Any such amendment that is mutually
acceptable to the Parties will be signed by the Parties and incorporated in this
Agreement as an amendment to this Exhibit A. In the event that a Party has
attempted on good faith to reach such amendment but has been unable to do so by
January 31, 2003, then within 60 days after that date it may notify the other
Party in writing of its intention to terminate this Agreement effective no more
180 days and not less than 90 days after the date of such notification. During
such period as set out in such

<PAGE>

notification, the notifying Party will make itself reasonably available for good
faith discussion with the other Party to attempt to avoid termination by
reasonable agreement acceptable to both Parties and will at the reasonable
request of such other Party make one or more of its senior executives available
for direct discussion with one or more executives of similar senior level in
such other Party in an attempt to determine whether an acceptable agreement
avoiding termination may be reached. The notification of termination may be
cancelled or extended by written agreement of the Parties.

<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

                                 Amendment No. 1
                                       To
                               Services Agreement

Vision Business Process Solutions, Inc. f/k/a Vision Healthsource, Inc.
("Vision"), Vision Healthsource India Private Ltd. ("Healthsource") and
athenahealth, Inc. ("Athena") enter into this Amendment No. I ("Amendment"),
effective October 13, 2004 ("Amendment Effective Date") to the Services
Agreement, dated December 9, 2002 (the "Agreement") between such parties, on the
following terms. Capitalized terms used in this Amendment shall have the same
meaning as in the Agreement.

As of the Amendment Effective Date, the parties hereto agree to make the
following changes to the Agreement:

1. The table in Section l (Pricing) of Exhibit A (Pricing and Services) is
replaced with the following table, THIS TIERED PRICING WILL HAVE EFFECT FROM
JANUARY 1 2003.

<TABLE>
<CAPTION>
                             UNIT PRICE PER CHARGE POSTED    UNIT PRICE PER CHARGE POSTED
NUMBER OF CHARGES           SUBJECT TO SERVICE LEVEL 1 AS   SUBJECT TO SERVICE LEVEL 2 AS
POSTED PER MONTH                    DEFINED BELOW                   DEFINED BELOW           AVERAGE
-----------------           -----------------------------   -----------------------------   -------
<S>                         <C>                             <C>                             <C>
0 - 125,000 Charges                      $*                              $*                   $*
125,001 - 250,000 Charges                $*                              $*                   $*
250,001 - 500,000 Charges                $*                              $*                   $*
500,001-1,000,000                        $*                              $*                   $*
Greater than 1,000,000                   $*                              $*                   $*
</TABLE>

<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

2. A new Section e), Monthly Invoice Discount, is added to Section 1 (Pricing)
of Exhibit A (Pricing and Services) as follows:

2. "e) Monthly Invoice Discount. Vision will discount each monthly invoice in
accordance with the table below ON A FLAT BASIS, WITH EFFECT FROM SEPTEMBER 1
2003.

<TABLE>
<CAPTION>
        PAYMENT POSTING                     AR FOLLOW UP
-------------------------------   -------------------------------
  MONTHLY INVOICE    DISCOUNT %     MONTHLY INVOICE    DISCOUNT %
------------------   ----------   ------------------   ----------
<S>                  <C>          <C>                  <C>
     $* to $*            *%            $* to $*            *%
     $* to $*            *%            $* to $*            *%
     $* to $*            *%            $* to $*            *%
     $* to $*            *%            $* to $*            *%
     $* to $*            *%            $* to $*            *%
     $* to $*            *%            $* to $*            *%
        $*               *%               $*               *%
</TABLE>

Except as set forth herein, all other terms and conditions of the Agreement
remain in full force and effect.

Vision Business Process Solutions, Inc.

By: /s/ Vardham Jain
    ---------------------------------
[name]
       ------------------------------
       President

Athenahealth, Inc.

By: /s/ L. Elizabeth Seeley
    ---------------------------------
[name]
       COO

Vision HealthSource India Private Ltd.

By: /s/ Vardham Jain
    ---------------------------------
[name]
       ------------------------------
       President
<PAGE>

                                SECOND AMENDMENT
                                       TO
                               SERVICES AGREEMENT

THIS SECOND AMENDMENT TO SERVICES AGES ("Amendment"), dated as of March 8, 2005
(the "Amendment Effective Date"), is between Vision Business Process Solutions,
Inc., a Delaware corporation (f/k/a Vision Healthsource, Inc.) with a principal
place of business at 8000 Towers Crescent Drive, Suite 1350, Vienna, VA
("Vision"), Perot Systems Business Process Solutions India Private Limited, a
private limited company organized under the laws of India (f/k/a Vision
Healthsource India Private Ltd.), with a principal place of business at DP110
(Second Phase) F-19, Industrial Estate, Ambattur, Chennai, 600 058, India
("Healthsource"), and athenahealth, Inc., a Delaware corporation with a
principal place of business at One Moody St., Waltham, MA 02453 ("Athena").
Vision and Healthsource are collectively referred to in this Amendment as "Perot
Systems".

WHEREAS, Perot Systems and Athena are Parties to that Services Agreement dated
December 9, 2002 (the "Agreement"); and

WHEREAS, Perot Systems and Athena desire to amend the Agreement to modify the
scope of the services provided by Vision and Healthsource to Athena under the
Agreement;

NOW, THEREFORE, in consideration of the mutual covenants and conditions set
forth in this Amendment, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Parties agree as
follows:

1.   Capitalized terms used herein and not otherwise defined shall have the
     respective meaning ascribed to them in the Agreement.

2.   Section 1)a) of the Agreement is amended in its entirety to read as
     follows:

     a)   Service to be Provided. Under the terms and subject to the conditions
          and obligations of this Agreement, Perot Systems will provide, and
          Athena hereby accepts, the services described in Exhibit A and the
          services described in any Task Order executed by the Parties from time
          to time (the "Services")

3.   Section 12)c) is added to the Agreement, the text of which is as follows:

     c)   With respect to all claims, actions and causes of action arising out
          of, under or in connection with Task Order No. 1, Task Order No. 2
          and/or any subsequent task order under this Agreement, regardless of
          the form of action, whether in contract or tort (including negligence,
          strict liability or otherwise) and whether or not such damages are
          foreseen, Perot Systems' collective liability will not exceed, in the
          aggregate, two times the total amount actually paid to Perot Systems
          by Athena under the applicable Task Order during the 12-month period
          immediately preceding the date that the claim, action, or cause of
          action arose out of under or in connection with this Agreement_ The
          foregoing limitation in this Section 12)c) will not apply to the
          extent that claims, actions and causes of action arise out of,

<PAGE>

          under or in connection with the obligations in Section 7 of the
          Agreement, as amended.

4.   Clauses 13)a)(ii) and 13)b)(iv) will be of no effect, and the respective
     Party will have no rights or obligations under either of those clauses,
     with respect to claims, losses, actions, liabilities, demands or damages to
     the extent that these arise out of obligations set forth in Task Order No.
     1, Task Order No. 2 and/or any subsequent task order under this Agreement.
     The foregoing limitation will not apply to the extent that claims, losses,
     actions, liabilities, demands or damages arise out of, under or in
     connection with the obligations in Section 7 of the Agreement, as amended.

5.   Task Order Nos. 1 and 2, which are attached to this Amendment, are
     incorporated into and made part of the Agreement as of the Amendment
     Effective Date.

6.   Section 7 of the Agreement is amended to add the following additional
     subsections q) through t):

     q)   To the extent that in connection with this Agreement Perot Systems
          receives or has access to health information sourced from or provided
          by the State or New York or any agency thereof, they agree to be in
          compliance with the New York State AIDS/mV Related Confidentiality
          Restrictions Notice hereinafter staled:

          "This information has been disclosed to you from confidential records,
          which are protected by state law. State law prohibits you from making
          any further disclosure of this information with out the specific
          written consent of the person to whom it pertains, or as otherwise
          permitted by law. Any unauthorized further disclosure in violation of
          state law may result in a fine or jail sentence or both. A general
          authorization for the release of medical or other information is not
          sufficient authorization for further disclosure."

     Perot Systems further agrees not to disclose Medicaid Confidential Data as
     defined under statues or regulations of the State or New York without prior
     written approval of the New York State Department of Health Office of
     Medicaid Management.

     r)   To the extent that in connection with this Agreement Perot Systems
          receives or has access to eligibility data from Medicare or any
          Medicaid Program, Perot Systems will each restrict its access to such
          Medicaid and Medicare eligibility data to the sole purpose of
          verification of patient eligibility for Medicaid and Medicare benefits
          respectively where the patient has requested such payment for medical
          services.

     s)   Capitalized terms used in this Section 6s), but not otherwise defined,
          shall have the same meaning as those terms in 45 CFR Section 160
          through 164. For the purposes of this Agreement "HIPAA" shall mean the
          Health Insurance Portability and Accountability Act of 1996, as
          amended and as such may be further amended from time to time,
          including all final rules and regulations promulgated thereunder. In
          addition to and without diminishing its other obligations under this

                                       2

<PAGE>

          Agreement with respect to privacy, security and confidentiality, Perot
          Systems will:

          i.   With respect to a facility owned or leased by or on behalf of
               Perot Systems where it creates, receives, maintains or transmits
               Pill on behalf of Athena, Perot Systems shall implement
               administrative, physical and technical safeguards that reasonably
               and appropriately protect the confidentiality, integrity and
               availability of protected health information ("PHI");

          ii.  Establish and enforce appropriate clearance procedures and
               supervision to assure that its workforce follows the requirements
               of the Agreement consistent with the requirements of HIPAA;

          iii. Act immediately and effectively to terminate access to PHI by any
               of its staff upon that person's termination or reassignment;

          iv.  Provide appropriate training for its staff to assure that its
               staff complies with its obligations consistent with the
               requirements of HIPAA;

          v.   Implement appropriate disposal and reuse procedures with respect
               to documents and equipment to protect PHI consistent with the
               requirements of HIPAA;

          vi.  Implement appropriate authentication and access controls to
               safeguard PHI consistent with the requirements of HIPAA;

          vii. Use appropriate encryption when it transmits PHI electronically;

          viii. Report promptly to Athena any security incident and any use or
               disclosure of PHI not provided for in this Agreement;

          ix.  Not store PHI beyond periods necessary to perform work under the
               Agreement and to conduct reasonable troubleshooting and quality
               control checking in connection with performance of such work;

          x.   Maintain a formal program to comply with privacy and security
               requirements, including written policies;

          xi.  Maintain a full time privacy officer on location in Perot
               Systems' facility located in Chennai, India;

          xii. Provides for review by a fully dedicated quality assurance team
               of systems and processes and regular audits of compliance,
               including external audits;

          xiii. Not perform or allow performance of any work under the Agreement
               other than on Perot Systems company premises and ensure that such
               facilities are guarded on a 24 hour a day basis and access to
               them is controlled by key cards and posted guards or similar
               protection;

                                       3

<PAGE>

          xiv. Restrict entry into work processing areas by proximity cards or
               similar protection; and,

          xv.  Restrict employee access to the Internet, e-mail, and removable
               media to deter removal of PHI from Perot Systems' premises.

     t)   For purposes of this Agreement, the "athenaNet(R) System" means the
          multi-user physician practice management and office workflow system
          made available by Athena on an ASP basis, without charge, to Perot
          Systems for its use and access solely to provide the Services. The
          athenaNet(R) System shall include, but not be limited to software
          applications, associated databases and associated technology assembled
          or created by and made available by Athena as part of athenaNet(R)
          System to enable system access and functionality; screens, functions,
          and formats for organizing or presenting data and data made available
          by Athena as part of the athenaNet(R) System; and, manuals,
          specifications, instructions and training provided by Athena in
          connection with the athenaNet(R) System, whether written or otherwise.

          i.   Perot Systems will not access or use the athenaNet(R) System or
               any other electronic system of Athena other than in compliance
               with the procedures and policies that Athena shall provide to
               Perot Systems from time to time.

          ii.  To the extent that any electronic system at Athena is licensed to
               it by a third party, then Perot Systems will not access or use
               such system other than in compliance with such license, and
               Athena will provide the terms and restrictions of such license to
               Perot Systems upon its request. Athena shall secure Perot Systems
               the right to access and use any such third party system or
               software and Athena shall pay any fees associated with such
               access.

          iii. Perot Systems will not knowingly, directly or indirectly, export
               or transmit (i) any software, application, access to any Athena
               systems or any related documentation or technical data or (ii)
               any product (or any part thereof), process, or service that is
               the direct product of any service under this interim agreement in
               or to the People's Republic of China, Afghanistan, Iraq or any
               group Q, S, W, Y or Z country specified in Supplement No. I of
               Section 770 of the United States Export Administration
               Regulations or to any other country to which such export or
               transmission is restricted by such regulation or statute, without
               the prior written consent, if required, of the Office of Export
               Administration of the United States Department of Commerce, or
               such other governmental entity as may have jurisdiction over such
               export or transmission. In addition, and without limitation of
               the foregoing, Perot Systems will not knowingly, directly or
               indirectly, export or transmit any of the foregoing to any
               country other than as required to perform the Services.

                                       4

<PAGE>

          iv.  Perot Systems will not access or use any Athena system,
               application or functionality unless and to the extent requested
               by Athena in writing for purposes of performing Perot Systems'
               obligations under the Agreement. No access to or use of Athena
               systems, applications or functionality is transferable to a third
               party by Perot Systems, provided Perot Systems may transfer
               access or use of such systems, application or functionality to a
               wholly-owned affiliate of Perot Systems, solely to the extent
               required to perform the Services.

          v.   In accessing or using the athenaNet(R) System, Perot Systems will
               not (i) make such access or use in connection with provision of
               any services to any third party; (ii) make such access or use
               other than through and by their own employees who are registered
               with Athena individually as authorized users thereof; (iii) make
               such access or use other than by electronically secure means and
               methods approved in advance in writing by Athena and only by the
               use of unique and confidential passwords applied to each
               individual user; (iv) resell, lease, encumber, sublicense,
               distribute, publish, transmit, provide such access or use to any
               third party in any medium whatsoever; (v) make such access or use
               on any public system or multiple computer or user arrangement or
               network accessible by anyone except Athena and Perot Systems;
               (vi) derive specifications from, reverse engineer, reverse
               compile, disassemble, or create derivative works based on Athena
               systems, applications; (vii) copy data or screens except on an
               occasional basis as necessary to accomplish its work or, (viii)
               knowingly input or post through or to the athenaNet(R) System
               Athena any content that is illegal, threatening, harmful, lewd,
               offensive or defamatory or that infringes the intellectual
               property rights, privacy rights or rights of publicity of others
               or that contains any virus, worm, Trojan Horse or other mechanism
               to damage or impair the operation of Athena systems, software or
               hardware or the systems, software or hardware of others or to
               grant unauthorized access to any data or system.

          vi.  Perot Systems will not make or operate or permit operation of any
               copy of any elements of Athena systems, applications or
               functionality except as explicitly authorized by Athena in
               writing. If and to the extent that Perot Systems makes or
               operates any copy of Athena systems, applications or
               functionality, such copy will belong exclusively to Athena and
               will be located only upon a server to which Athena is the sole
               owner of the root password; and, Perot Systems will not restrict
               or permit restriction of electronic or physical access of Athena
               to such server.

          vii. In accessing or using Athena systems, Perot Systems will not
               order, review, access or use any data in excess of that
               reasonably necessary for it to perform the work it its obligated
               to do under the Agreement.

          viii. Perot Systems limit access to and use of the athenaNet(R) System
               by its personnel to appropriate and secure levels. Perot Systems
               is responsible

                                       5

<PAGE>

               for the actions of individuals to which Perot Systems grants
               access to the athenaNet(R) System. If Perot Systems or any Perot
               Systems employee discloses a password to an unauthorized person,
               Perot System is validating the identity and authority of such
               person to act on its behalf as to any access or use of the
               athenaNet(R) System with that password and will be responsible
               for such access and use. Perot Systems will notify Athena
               immediately if it becomes aware of any unauthorized use of any
               athenaNet(R) System username or password, and will take
               reasonable steps with Athena to shut off access by the individual
               associated with such username and associated password.

7.   Subject only to the modifications expressly set forth in this Amendment,
     the Agreement is hereby ratified and affirmed by each Party, and shall
     remain in full force and effect. This Amendment may be executed in any
     number of counterparts, all of which, taken together shall constitute this
     Amendment.

                                       6

<PAGE>

The Parties, through their duly authorized representatives, have executed this
Amendment effective as of the date first above written, whereupon it became
effective in accordance with its terms.

VISION BUSINESS PROCESS SOLUTIONS,      PEROT SYSTEMS BUSINESS PROCESS SOLUTIONS
INC.                                    INDIA PRIVATE LTD.

By: /s/ Vardhman Jain                   By: /s/ Vardhman Jain
    ---------------------------------       ------------------------------------
Name: Vardhman Jain                     Name: Vardhman Jain
Title: President                        Title: President
Date: 4/13/05                           Date: 4/13/05

ATHENAHEALTH, INC.

By: /s/ L. Elizabeth Seeley
    ---------------------------------
Name: L. Elizabeth Seeley
Title: COO
Date: 4/13/05

                                       7

<PAGE>

                                 AMENDMENT NO. 3
                                       TO
                               SERVICES AGREEMENT

This Amendment No. 3 (the "AMENDMENT") to the Services Agreement dated December
9, 2002, read in conjunction with the Amendment No. 1 dated October 13, 2004 and
Amendment No. 2 dated March 8, 2005, (together, the "AGREEMENT") is entered into
on this 12th day of APRIL 2006 (the "AMENDMENT EFFECTIVE DATE").

BY AND AMONGST

1.   VISION BUSINESS PROCESS SOLUTIONS, INC., (formerly known as `Vision
     Healthsource, Inc.'), a Delaware Corporation, having its principal place of
     business at 2300, West Plano Parkway, Piano, Texas 75075, hereinafter
     referred to as "VISION", which expression shall, unless repugnant to the
     context or meaning, mean and include its successors and permitted assigns;
     and

2.   PEROT SYSTEMS BUSINESS PROCESS SOLUTIONS INDIA PRIVATE LIMITED (formerly
     known as `Vision Healthsource India Private Ltd.'), a company incorporated
     under the laws of India and having its principal place of business at A9,
     1st Main Road, Arnbattur Industrial Area, Chennai - 600 058, hereinafter
     referred to as "HEALTHSOURCE", which expression shall, unless repugnant to
     the context or meaning, mean and include its successors and permitted
     assigns; ON THE ONE HAND and

3.   ATHENAHEALTH, INC., a Delaware Corporation, having its principal place of
     business at One Moody St. Waltham, MA 02453, hereinafter referred to as
     "ATHENA", which expression shall, unless repugnant to the context or
     meaning, mean and include its successors and permitted assigns; ON THE
     OTHER HAND

Vision and Healthsource are collectively referred to in this Amendment as "PEROT
SYSTEMS".

WHEREAS Perot Systems and Athena are parties to the Agreement; and

WHEREAS Perot Systems and Athena desire to amend the Agreement in accordance
with the terms of this Amendment;

NOW, THEREFORE, in consideration of the mutual covenants and conditions set
forth in this Amendment, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Parties agree as
follows:

1.   Capitalized terms used herein and not otherwise defined shall have the
     respective meaning ascribed to them in the Agreement.

<PAGE>

2.   Clause (3) ATHENA RESPONSIBILITIES - OF EXHIBIT A TO THE AGREEMENT:

     Clause (3) - Athena Responsibilities of Exhibit A to the Agreement shall be
     amended in its entirety to read as follows:

     "Athena is responsible for the delivery of legibly scanned electronic
     files, electronically legible data and all other necessary practice data to
     permit posting (in a format that is consistent with format in use between
     the Parties prior to this Agreement and any that are mutually established
     subsequently) at Athena's sole cost and expense. In addition to the above,
     Athena may, from time to time, instruct in writing to Vision to either
     delay the processing or to put on hold the processing of one or more charge
     batches (the "A-Batches on Hold"). Further, if a batch provided by Athena
     to Vision is illegible or incomplete or Athena fails to supply necessary
     information concerning the batch and if Vision is therefore not able to
     post the batch, then Vision may put on hold the processing of the batch
     (the "V-Batches on Hold") provided that it so informs Athena by e-mail to
     Communication Contact identified in section 1 (d) within 48 hours of first
     receipt by Vision stating the reason for the hold and provided that Vision
     will immediately remove the hold if and when Athena provides or corrects
     the necessary information (The term necessary information, shall include
     all the relevant information to be provided by Athena to Vision to process
     the batches. The said A-Batches and V-Batches on hold shall be processed
     according to the Service Levels herein referred to in Clause 4 (a) (i) of
     this Amendment). A-Batches on Hold and V-Batches on Hold are together
     hereinafter referred to in this Amendment as "Batches on Hold". Athena is
     responsible for the substance of all information it provides to Vision,
     except to the extent that such substance is altered by Vision".

3.   CLAUSE 4 (A) (I) - POSTING COMPLETION:

     Clause 4 (a) (i) - Posting Completion of Exhibit A to the Agreement shall
     be amended in its entirety to read as follows:

     "Data provided by Athena under this Agreement will be posted/processed by
     Vision (or by Healthsource to the extent that Vision subcontracts with it
     to perform some or all of the Services) under one of the two below
     mentioned Services Levels, as instructed in writing by Athena at the time
     of providing the data to Vision. Service Level 1 requires Vision to
     complete 98% of the charge postings within 12 hours of receipt and 100% of
     the charge postings within 36 hours of receipt. Service Level 2 requires
     Vision to complete 95% of the charge postings within 36 hours of receipt
     and 100% within 60 hours of receipt. All references to "receipt" are to
     actual receipt by Vision of all required information in a manner that
     conforms to the specifications of this Agreement. The drop-off time will be
     10:00 p.m. eastern standard time for Athena to have files ready for pick up
     (electronically) by Vision and 10:00 a.m. eastern standard time for Vision

<PAGE>

     to drop-off (electronically) the completed (i.e., posted) file to Athena.
     Notwithstanding anything to the contrary contained herein and for the
     avoidance of doubt, the charges that have been placed in the Batches on
     Hold shall be excluded for the purposes of calculating Vision's Service
     Levels under this Agreement. Provided further that charges in A-Batches on
     Hold shall be posted/processed by Vision only after receipt of fresh
     instructions from Athena along with instructions on Service Levels herein
     referred above under which Vision shall be required to post/process the
     data in the relevant A-Batches on Hold. Upon receipt of sufficient
     corrected and legible information to permit posting/processing by Vision
     with respect to any V-Batch on Hold, Vision will confirm such receipt to
     Athena by e-mail to Communication Contact identified in section 1 (d)
     within 12 hours, and Athena will thereafter instruct the Service Levels
     herein referred above under which Vision shall be required to post/process
     the data in such V-Batch on Hold.

Clause 4(b) Accuracy of Posting of Exhibit A is deleted in its entirety and
replaced with the following:

4 (B) ACCURACY OF POSTING

(i) Specifications. Within a period of 60 days from the execution date of this
Amendment, the parties shall document a mutually agreeable specification for
posting actions. Such specification may be amended by Athena from time to time
with the written consent of Vision, provided that such consent will not be
unreasonably withheld. During the 30 days following proposal of a specification
amendment by Athena, the parties will discuss in good faith additional pricing
to cover Vision's incremental costs for those specification changes that
increase the cost of Vision to provide posting services under this Agreement,
and Vision will not be required to consent to those specification changes in the
absence of written agreement on pricing to cover its incremental costs. If both
Athena and VBPS are unable to agree to the amount of incremental costs in
connection with a specification amendment, either party may request the matter
be resolve by an "Expert" under Section 4(b)(ix)(E) below.

(ii) Sampling Methods. In addition, within a period of 60 days from the
execution date of this Amendment, the parties shall document two mutually
agreeable and statistically valid methods of sampling for posting errors that
are consistent with industry practice - a method that is agreed to be
appropriate to determine accuracy of Vision's posting overall on a monthly basis
against the specifications agreed above for purposes of Monthly Overall Accuracy
Review (as set forth in Section 4(b)(v) below), and a method that is agreed to
determine accuracy of specific types or aspects of posting against the
specifications agreed above for purposes of Focused Accuracy Review (as set
forth in Section 4(b)(vi) below).

Athena may develop and provide documents from time to time explaining in detail
alternative or proposed sampling methodologies that Athena wishes to use in
connection with Section 4(b) (v), (vi) or (vii) below and that Athena believes
in good faith are

<PAGE>

reasonably designed to determine whether errors or patterns of error exist, for
Vision's review.

(iii) Posting Errors Defined. For purposes of this Section 4(b), posting errors
are defined as variances from the applicable specification established as set
forth above. A material posting error shall be a posting error by Vision that
causes a materially inaccurate record to be produced, that is likely to cause or
require either Athena or its customers to undertake material additional work or
that results or that will likely result in a material compliance issue for
Athena or its customers. Without limitation, missing, incomplete or incorrect
claim or charge information, claim ID number, date of service, code, amount
billed, payment, transfer, adjustment or kick-code as compared against the data
originally provided by Athena, will be considered a material error. The
specifications reference in Section 4(b)(i) above will contain directions for
Vision action in the event that data that it receives from Athena is illegible,
missing or incomplete in such a way as to practically prevent normal posting or
is insufficient for normal posting and the usage of which may result in a
posting error or material posting error. Although it will not be considered a
material error for Vision to fail to complete normal posting requirements with
respect to such data, it will be a material error for Vision to fail to take
action in conformity with the specification relating to such data and to fulfill
normal posting requirements upon receipt of correct and accurate information
from Athena in respect of such incomplete, illegible, missing or insufficient
data, adequate for Vision to discharge its obligations of posting. Neither Party
to the Agreement will be in default or be penalized for a failure to perform
obligations that is caused by the failure of the other party to perform its own
obligations under the Agreement.

(iv) Individual Posting Errors. If Athena reasonably believes that the
correction of posting errors in individual posting entries can most efficiently
be accomplished by Vision and if Vision has at its disposal all requisite means
necessary so as to enable Vision to effectively make such correction, then,
Athena may from time to time inform Vision by e-mail to the Communication
Contact of material posting errors in specific individual posted items or files
as set forth in the e-mail, no later than 60 days from the date of posting of
the data in relation to which Athena has identified a material error and may
request Vision to revise or modify its process to address such material posting
error and to devise a mechanism to correct such material posting errors for all
future posting of the data.

(v) Monthly Overall Accuracy Review. The purpose of the Monthly Overall Accuracy
Review is to assess frequency of posting errors on a general, overall basis for
a given month. Athena may, not more than once for any month in which the
services are provided, provide Vision with results of a sampling for that month,
done according to the method set forth in Section 4(b)(ii) above for Monthly
Overall Accuracy Review within 60 days of the end of the subject month. The
sampling will not be focused by charge type, EOB data type, region, poster or
customer but may in Athena's discretion be focused on three or more days within
the month. Such results will be provided, if at all, within 60 days of the end
of the subject month, they will be communicated by e-mail to

<PAGE>

the Communication Contact, and Athena will provide Vision with a copy of a
report detailing the data used, the method applied and the result obtained in
connection with the sampling.

(vi) Focused Accuracy Review. The purpose of the Focused Accuracy Review is to
assess the frequency of types of posting errors and errors with common types of
causes by assessing posting for patterns of error for a given month within a
period of 60 days from the completion of such month. Athena may from time to
time inform Vision by e-mail to the Communication Contact of patterns of
material posting errors identified by the sampling method set forth in Section
4(b) (ii) within 60 days of the end of the subject month. Athena will
simultaneously provide Vision with a copy of a report detailing the data used,
the method applied and the result obtained in connection with the pattern.

(vii) Customer Driven Accuracy Review. The purpose of the Customer Driven
Accuracy Review is to assess and take appropriate action with respect to
complaints of Athena's customers that relate to posting accuracy. If, within 60
days of the end of any month Athena informs Vision, by e-mail to the
Communication Contact, that Athena has received one or more customer complaints
that it believes in good faith can be resolved or addressed by identifying
posting errors in that month based on criteria related to the complaint(s), if
Athena provides documentation of such complaint(s) to Vision and if it states
that it wishes to initiate a Customer Driven Accuracy Review, then the parties
will confer in good faith to define mutually agreeable sampling methodology that
is reasonably calculated to test for such errors and that is consistent with the
principles employed in adopting the sampling methods under Section 4(b)(ii)
above.

Within 20 days of agreement on a methodology, Athena will conduct the review
using that methodology and notify Vision by e-mail to the Communication Contact
of the results, together with a copy of a report detailing the data used, the
method applied and the result obtained in connection with the review.

(viii) Action Steps.

(A)  If Athena reasonably believes that the correction of posting errors in
     individual, specific posting entries can most efficiently be accomplished
     by Vision and if Vision has at its disposal all requisite means necessary
     so as to enable Vision to effectively make such correction, then at request
     of Athena made by e-mail to the Communications Contact, Vision will have a
     reasonable period to revise and correct such posting entries. However, if
     Athena requests or requires changes to Vision work process or systems in
     order to address error patterns disclosed in Monthly Overall Accuracy
     Reviews, Focused Accuracy Reviews, Customer Driven Accuracy Reviews or
     otherwise identified to it by Athena, then such changes will be governed
     under Section 4(b)(viii)(B) below.

(B)  At the request of Athena made by e-mail to the Communication Contact,
     Vision will within 5 business day after receipt of such request either (1)
     implement

<PAGE>

     effective changes in its processes and systems to eliminate future
     occurrence of a pattern identified in a Monthly Overall Accuracy Review,
     Focused Accuracy Review or Customer Driven Accuracy Review or (2) if such
     changes will increase the cost of Vision to provide posting services under
     this Agreement, provide Athena a written explanation of such changes and
     costs, and Vision will not be required to implement such changes in the
     absence of written agreement on pricing to cover its incremental costs. If
     there is an issue or disagreement that is the subject of timely discussion
     and process under Section 4(b)(ix) below relating to such pattern or costs,
     then Vision will not be required to implement such changes until the review
     and recommendation of the Expert is complete or an agreed resolution has
     been reached. In case of such issue or disagreement, Athena may still in
     writing request Vision for institution of effective changes, and Vision may
     accommodate the effective changes within 5 business days of such request.
     In addition to the above, if the changes required under this paragraph are
     substantial in nature, then Vision will complete the documentation update,
     training and implementation of the same within five (5) days from the date
     of request from Athena, provided the timelines are mutually agreed between
     both the parties at the time of change request.

(C)  Vision will not assess fees to Athena for corrections made by Vision of
     specific posting errors in individual posting entries under Section 4(b)
     (viii)(A), provided however, that for corrective actions under that Section
     taken by Vision for any posting errors arising on account of (a) any
     inaccurate, incomplete or insufficient specifications provided by Athena to
     Vision in relation to the posting, and/or (b) any changes, modifications or
     alterations to the agreed specifications by Athena, Vision may charge
     Athena based on mutual agreement of the parties.

(D)  If the posting error rate in any month disclosed by a Monthly Overall
     Accuracy Review or a Focused Accuracy Review properly calculated under the
     applicable method set forth in Section 4(b)(ii) above exceeds 2% of the
     total postings made for the relevant month, then in addition to any
     correction of posting errors required under Section 4(b)(viii)(A), Vision
     will credit to Athena for that month an amount equal to the percentage
     difference between the error rate and 2%, times the applicable Error Factor
     (as defined below) and times (in the case of error disclosed in a Monthly
     Overall Accuracy Review) the total Vision charges assessed in that month or
     times (in the case of a Focused Accuracy Review) the total Vision charges
     for posting of the type reviewed in the sample. The Error Factor will be
     calculated as follows: if the error rate in the Monthly Overall Accuracy
     Review and all Focused Accuracy Reviews relating to that month are less
     than 7% then the Error Factor for the month will be 2; if the error rate
     disclosed by either the Monthly Overall Accuracy Review or any Focused
     Accuracy Review for that month is equal to or greater than 7%, but no error
     rate so disclosed is equal to or greater than 9% then the Error Factor for
     the month will be 5; if either the Monthly Overall Accuracy Review or any
     Focused Accuracy Review for that month disclosed an error rate equal to or
     greater than 9%, then the Error Factor for the month will be 10.

<PAGE>

(ix) Issues and Disagreements

     (A)  If Vision believes in good faith that an error rate disclosed in any
          review properly performed by Athena is not accurately representative
          for the relevant time period, then it will so notify Athena within 15
          days of after it receives notice of the error rate. In the event of
          such disagreement, Vision and Athena will each be entitled to present
          to the other within the next 10 days a single sample meeting the
          relevant methodology, together with detailed information to permit
          verification by the other of the manner in which the sample was
          selected; and, the error rate for the applicable review will be the
          average between the two error rates of such samples, provided that if
          only one sample that meets the methodology adopted under Section
          4(b)(ii) is presented within those ten days, then the error rate in
          that sample will control. Failure of Vision to inform Athena that it
          disputes an error rate as provided in this Section will be deemed
          acceptance of the rate by Vision.

     (B)  If Vision in good faith believes that any sampling methodology
          proposed by Athena is not reasonably designed to determine whether
          errors or patterns of errors (as the case may be) exist, then Vision
          shall so inform Athena by e-mail to the Communication Contact within
          14 days from the date of receipt of any such methodology from Athena,
          and the parties will promptly work, through their respective
          Communication Contacts, for a period of at least 20 days to resolve
          the dispute in good faith. Failure of Vision to inform Athena that it
          disputes a proposed methodology as provided in this Section will be
          deemed acceptance of the methodology by Vision, and Athena will be
          permitted to the use the methodology under this Section 4. Provided
          that in the case of an issue or disagreement that is the subject of
          timely discussion or process relating to such pattern under this
          Section 4(b)(ix), Vision will not be required to implement such
          changes until the review and recommendation of the Expert is complete
          or agreed resolution has been reached, whichever first occurs.

     (C)  If either party believes in good faith that the other has failed to
          properly follow the appropriate sampling method under Section 4(b)(ii)
          to determine errors, patterns of error, or error rates under this
          Section 4, then it shall so inform the other party by e-mail to the
          Communications Contact within 14 days from the date the other party
          discloses to it the specifics of the relevant sample; and, the parties
          will promptly work, through their respective Communication Contacts,
          for a period of at least 20 days to resolve the dispute in good faith.
          Failure of a party to inform the other that it disputes the
          application of a method as provided in this Section will be deemed
          acceptance of the application by that party.

     (D)  If in response to notice from Vision that elimination of a pattern of
          error is not possible under Section 4(b) (viii) (B), Athena believes
          in good faith that such elimination is possible, it will so inform
          Vision within 72 hours after such notice; and, the parties will then
          promptly work, through their respective Communication Contacts, for a
          period of at least 20 days to resolve the dispute

<PAGE>

          in good faith. Failure of Athena to inform Vision as provided in this
          Section will be deemed acceptance by Athena that such elimination is
          not possible.

     (E)  Within 30 days after the date of this Amendment, the parties will
          agree on a list of no fewer than three third party experts (the
          "Experts") in rank order of preference as mutually agreed. In the
          event that the parties cannot reach agreement on a methodology for
          sampling under Section 4(b)(ii) or 4(b)(vii) or in the event that the
          parties otherwise cannot resolve disputes over interpretation or
          application of sampling methodologies under this Section 4, or in the
          event that the parties are unable to agree to additional pricing to
          cover incremental costs under this Section 4, either party may require
          that the matter be submitted to one of the Experts for determination.
          Such request must be made within 14 days after the dispute is first
          raised or after the expiration of any time period set aside under this
          Section 4 for attempted mutual resolution by the parties, whichever is
          later. The parties will cooperate to submit the dispute to one of the
          Experts, in order of the preference on the agreed list. The Expert
          that accepts and is first available for the task will review the
          sampling method(s) or reviews at issue and the parties written
          comments. Within 21 days from the date that the issue is referred to
          him, the Expert will: (a) with respect to issues over sampling
          recommend the sampling method(s) or correction(s) that he believes
          is/are commercially reasonable, consistent with standard industry
          practice, adequate to determine compliance by Vision with the
          Specifications and resolve the dispute; and, (b) with respect to
          issues over cost recommended under Section 4(b) (i), the cost figures
          that the Expert believes is/are commercially reasonable, consistent
          with standard industry practice, and adequate to compensate for the
          actual incremental costs to Vision on account of the proposed
          specification amendment(s) at issue. The costs of the Expert for all
          determination made by him pursuant to this Section will be borne
          equally by the parties.

          In connection with making such recommendation on issues of cost under
          Section 4(b) (i), each party will be required to provide the Expert
          with such documentation or other information in its possession that
          the Expert reasonably requests and that are reasonably related to his
          determination to facilitate the Expert in determining the cost,
          provided that the expert will retain all such documents and
          information provided by each party as confidential to the party
          producing them and will not disclose the same in any manner whatsoever
          (except as required by law) to any other person or entity, including
          but not limited to the other party. In this regard each of the parties
          shall execute acceptable non-disclosure agreements with the Expert.

          Until the review and recommendation of the Expert is complete, neither
          of the parties will be obligated to take any action or grant any
          credit under Section 4(b) (viii) based on the sampling method(s) or
          error rate(s) or costs at issue under the Section 4(b) (ix). If either
          of the parties reasonably believes that the sampling method(s) or
          correction(s) or costs recommended suggested by the Expert are
          unreasonable or unfair, that party may refer any such dispute to
          arbitration

<PAGE>

          proceedings as contemplated under the terms of the Agreement. However,
          to ensure the service delivery is not impacted, the sampling method(s)
          and correction(s) and costs recommended by the Expert shall be
          implemented as an interim solution under this Section 4(b) and the
          specified actions will be taken and credits made accordingly, until
          the arbitration process is completed.

(x) Vision QA. Notwithstanding this Section 4(b), Vision will itself exercise
commercially reasonable efforts to monitor the quality of its work and to
identify individual errors and patterns of errors in its posting work. Vision
will take prompt, commercially reasonable action, in the form of correction of
individual items or in the form of changes or updates to its process, as the
case may require, to correct individual material errors and patterns of material
errors that it identifies and will coordinate such actions with Athena to
minimize duplicated effort and to avoid adverse effects of unexpected data
changes.

(xi) Athena Advice. In addition to the above, Athena will periodically review
Vision processes and will provide advice concerning process changes that Athena
believes will improve accuracy and/or efficiency of Vision work. Vision will
consider adopting such improvements in good faith and Athena will collaborate in
Vision's implementation of those changes to which Vision agrees and will, if
requested by Vision, approve or disapprove of the implementation. If Vision
makes a change in its process as advised by Athena and if Athena has approved
the implementation of the change, then material posting errors caused by the
change will not be counted in the posting error rate applied to Section
4(b)(viii)(D) above and Vision will be permitted to charge at its regular rates
under this Agreement for any actions to correct material posting errors or
patterns of material posting errors taken pursuant to Sections 4(b)(viii)(A) and
(B).

5. PRICING MODEL - TRANSACTION PRICING TO FTE PRICING:

Athena and Perot Systems will engage in further incremental service agreements
pursuant to Task Orders to be executed under the terms of the Agreement and
substantially in the form of the template Task Order annexed to this Amendment
as Annexure 1.

Athena and Perot Systems would use FTE Pricing model for the new services. For
the existing business, Athena and Perot Systems may mutually decide and agree on
the timeline for movement into FTE based pricing.

Where FTE Pricing is appropriate, Athena and Perot Systems will use the
following rates, subject to assumptions provided in Clause 5, given below:

<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

<TABLE>
<CAPTION>
SERVICE                                      NORMAL TIME   OVER TIME
-------                                      -----------   ---------
<S>                                          <C>           <C>
Transaction Processing/Data Entry Services      US $*        US $*
Phone Based Services                            US $*        US $*
</TABLE>

6. PROFILE: -

Perot Systems shall document the current recruitment profile for Athena and the
same shall he shared with Athena prior to execution of any Task Orders far any
services (the "Recruitment Profile annexed as Annexure II"). In case of Athena
and Perot Systems agree upon a Task Order for provision of new services at a
future date, the Recruitment Profile herein annexed as Annexure II by Perot
Systems shall be used as a benchmark for the same. If the profile required by
Athena for the new service is different from the Recruitment Profile annexed
herein, then the Parties shall mutually agree and set out a separate pricing for
such new service under the applicable Task Orders.

The Parties, through their duly authorized representatives, have executed this
Amendment effective as of the Amendment Effective Date, whereupon it became
effective in accordance with its terms.

VISION BUSINESS PROCESS SOLUTIONS,      ATHENAHEALTH, INC.
INC.

By: /s/ Vardhman Jain                   By: /s/ Ralph J. Catalano
    ---------------------------------       ------------------------------------
Name: VARDHMAN JAIN                     Name: RALPH J. CATALANO
Title: MANAGING DIRECTOR                Title: VICE PRESIDENT
Date: 4/12/06                           Date: 4/12/06

PEROT SYSTEMS BUSINESS PROCESS
SOLUTIONS INDIA PRIVATE LIMITED

By: /s/ Vardhman Jain
    ---------------------------------
Name: VARDHMAN JAIN
Title: MANAGING DIRECTOR
Date: 4/12/06

<PAGE>

                                   ANNEXURE 1

                                   TASK ORDER

This Task Order (the "Task Order") is entered into on this ______ day of
_____________ under the Master Services Agreement dated _________________,
executed amongst Athenahealth, Inc., ("Athena"), Vision Business Process
Solutions Inc., (VBPS) and Perot Systems Business Process Solutions India
Private Limited (formerly "Vision Healthsource India Private Limited" and
hereinafter called "PSBPS").

1.   TERM:

     This Task Order shall be in effect for a period of thirty-six (36) months
     (the "Initial Term") from June 16, 2005 (the "Effective Date"). Upon
     expiration of the Initial Term, this Task Order will automatically be
     renewed for consecutive additional terms of two (2) years each.
     Notwithstanding the foregoing, either party may terminate this Task Order
     with or without cause, effective at the end of the then current term
     (including the Initial Term) by providing the other party written notice of
     its intent to cancel at least six (60) days prior to the expiration of the
     then current term.

2.   SCOPE OF WORK:

     Under the terms and conditions of this Task Order, VBPS shall provide the
     services of "_______________", ____________________________________ ("VBPS
     Services") and Athena shall pay for such VBPS Services.

3.   PRICE:

     VBPS will charge Athena for the VBPS Services under this Task Order at the
     following rates:
     __________________________________________________________________________

     For the above processed, ___________________________ will be tracked by
     _________________________ software called ____________________.

     VBPS will invoice Athena on a monthly basis. Athena shall make complete
     payment of the invoiced amounts to VBPS within thirty (30) days from the
     date of the invoice. Athena shall pay to VBPS the complete invoiced amounts
     without any deduction on account of non-payment by the clients of Athena.
     Late

<PAGE>

     payments shall attract interest from the due date at the lesser of (i) one
     and a half percent per month, to accrue on a daily basis with monthly rests
     and to run from the due date until payment of such amount in full, or (ii)
     the maximum rate permitted by law.

4.   COST OF LIVING ADJUSTMENT.

     The cost of living adjustment index would be based on the information made
     available by Reserve Bank of India (RBI) for each year, in the website
     below.

     http://www.rbi.org.in/scripts/PublicationsView.aspx?id=7263#7

     We would be referring to the Harmonized Index of Consumer Prices (HICP) for
     Consumer Price Inflation (CPI) - Urban non Manual employees index shared by
     RBI (Reserve Bank of India) in the above website link. This index is
     proposed since it is released by RBI (Reserve Bank of India, Apex Bank
     regulated by the Government of India) and also is the closest index
     available for cost of living and urban population. For instance, the cost
     index for the year 2004-2005 has been at 5%. With respect to the rates for
     charges stated in this Task Order, commencing on the first anniversary of
     the Effective Date and on each anniversary thereafter during the term of
     the Task Order, such rates, applicable from time to time to the Task Order,
     will be increased, with effect from each anniversary, by percentage as
     released by RBI for the above referred index.

5.   OTHER TERMS:

     PSBPS and Athena will separately do a time study, mutually agree and
     document the turnaround times, quality, auditing and other compliance
     requirements and obligations.

AGREED:

VISION BUSINESS PROCESS SOLUTIONS,      ATHENAHEALTH, INC.
INC.

By:                                     By:
    ---------------------------------       ------------------------------------
Name:                                   Name:
      -------------------------------         ----------------------------------
Title:                                  Title:
       ------------------------------          ---------------------------------
Date:                                   Date:
      -------------------------------         ----------------------------------

<PAGE>

PEROT SYSTEMS BUSINESS PROCESS
SOLUTIONS INDIA PRIVATE LIMITED

By:
    ---------------------------------
Name: VARDHMAN JAIN
Title: MANAGING DIRECTOR
Date:
      -------------------------------

<PAGE>

                                   ANNEXURE II

FINANCIAL TRANSACTION PROCESSING EXECUTIVE

CRITERIA: Graduation is a must to take part in the selection process

SELECTION PROCESS:

     A.   Typing / Keyboard speed of 25 Words Per Minute. (Average speed
          including numbers and special characters)

     B.   Analytical Aptitude / Language Test: Candidates should score more than
          60% to be eligible for selection. Those failing to score 60 % are
          rejected.

     C.   Interview: Graduates with experience in Accounts or those who have
          studied Accountancy either at Graduation or at Intermediate are
          preferred.

     D.   Interview: Candidates are told about the nature of work and the career
          prospects. Their willingness to take up shift work and being flexible
          to accommodate work requirements is confirmed before making an offer.

     E.   Induction: All selected candidates undergo a through training and
          their knowledge is tested and only those who qualify are allowed to
          process claims.

ACCOUNTS RECEIVABLE EXECUTIVE

CRITERIA: Graduation is a must to take part in the selection process.

SELECTION PROCESS:

     A.   Group Discussion: Applicants language skills are assessed. Candidates
          who do not make grammatical errors are identified. Then they are
          tested for their Accent. They are tested for their rate and clarity of
          speech.

     B.   Analytical Aptitude / Language Test: Those clearing the Group
          Discussion are administered with this test. Candidates should score
          more than 60 % to be eligible for selection. Those failing to score 60
          % are rejected.

     C.   Listening skills/grammar/comprehension/diction: Those short-listed
          from above processes are identified to go through a rigorous
          assessment of Language, voice and accent. Successful candidates are
          then considered for next stages.

<PAGE>

     D.   Interview: Graduates with excellent clarity of speech, with people
          interaction skills are selected for this profile.

     E.   Interview: Candidates are told about the nature of work, and the
          career prospects. Their willingness to take up shift work and being
          flexible to accommodate work requirements is confirmed before making
          an offer.

     F.   Induction: The selected ones are provided with intensive training on
          US Healthcare and are tested for their knowledge before they are
          permitted to make calls,

AGREED:

VISION BUSINESS PROCESS SOLUTIONS,      ATHENAHEALTH, INC.
INC.

By: /s/ Vardhman Jain                   By: /s/ Ralph J. Catalano
    ---------------------------------       ------------------------------------
Name: VARDHMAN JAIN                     Name: RALPH J. CATALANO
Title: MANAGING DIRECTOR                Title: VICE PRESIDENT
Date: 4/12/06                           Date: 4/12/06

PEROT SYSTEMS BUSINESS PROCESS
SOLUTIONS INDIA PRIVATE LIMITED

By: /s/ Vardhman Jain
    ---------------------------------
Name: VARDHMAN JAIN
Title: MANAGING DIRECTOR
Date: 4/12/06
<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

                                Task Order No. 1
                            Accounts Payable Services

Vision Business Process Solutions, Inc., a Delaware corporation (f/k/a a Vision
Healthsource, Inc.) with a principal place of business at 8000 Towers Crescent
Drive, Suite 1350, Vienna, VA ("Vision"), Perot Systems Business Process
Solutions India Private Limited, a private limited company organized under the
laws of India (f/k/a Vision Healthsource India Private Ltd.), with a principal
place of business at DP110 (Second Phase) F-19, Industrial Estate, Ambattur,
Chennai, 600 058, India (Healthsource"), and athenahealth, Inc., a Delaware
corporation with a principal place of business at One Moody St., Waltham, MA
02453 ("Athena") hereby enter into this Task Order No. 1 under that certain
Services Agreement dated December 9, 2002 between the Parties (the "Agreement"),
as amended, including but not limited to as amended by the Second Amendment to
Services Agreement dated March 8, 2005 (the "Second Amendment"; the Agreement as
so amended is referred to as the "Amended Agreement"), on the following terms.
Vision and Healthsource are collectively referred to as "Perot Systems". Except
as otherwise defined herein, all capitalized terms used herein shall have the
same meaning as in the Agreement or the Second Amendment, as the case may be.

1.   Term. This Task Order will, commence on March 8, 2005 (the "Task Order
     Effective Date") and will continue until December 9, 2007 unless earlier
     terminated by termination of the Amended Agreement or otherwise in
     accordance with the Amended Agreement. Subject to agreement on rates and
     services, this Task Order may be extended upon mutual written agreement of
     the parties, provided that the parties have agreed to extend the term of
     the Amended Agreement as set forth in Section 3)a) of the Amended
     Agreement.

2.   Services. Perot Systems will provide the number of full-time-equivalent
     resources (each an "FTE") described in and subject to Section 4.C. of
     Exhibit A attached hereto on a time and materials basis to provide the
     services described in Section 1 of Exhibit A ("Accounts Payable Services").
     The Accounts Payable Services will be in accordance with and governed by
     the business rules document ("Business Rules"), which will be agreed to by
     the parties prior to initiating the Accounts Payable Services and updated
     by mutual agreement of the parties from time to time during the term of
     this Task Order.

3.   Athena Obligations. In addition to its obligations under the Amended
     Agreement, Athena will perform its obligations specified in Section 2 of
     Exhibit A.

4.   Charges.

     (a)  Monthly Fee Per FTE. In addition to all amounts payable under the
          Amended Agreement, Athena will pay Perot Systems a monthly fee of
          US$* for each full-time-equivalent resource (each, an "FTE'")
          that provides services under this Task Order. The monthly fee will be
          appropriately prorated for (i) less than a FTE provided and (ii) for
          any FTE that begins or ends services on other than the first or last
          of the month.

     (b)  Taxes. Athena shall pay all excise, use and sales taxes levied in
          connection with this Task Order in accordance with Section 2)a) of the
          Amended Agreement.

<PAGE>

     (c)  Adjustment to Monthly Fee. Perot Systems' charges set forth above,
          will be increased annually on the anniversary of the Task Order
          Effective Date to reflect the increase, if any, in the Employment Cost
          Index, Total Compensation, Not Seasonally Adjusted, Private Industry
          for Professional Specialty and Technical Occupations published by the
          Bureau of Labor Statistics of the United States Department of Labor
          (the "ECI"), over the preceding anniversary of the Task Order
          Effective Date.

5.   Termination. Athena may terminate this Task Order at any time without
     penalty by providing Perot Systems with ninety (90) days prior written
     notice.

None

AGREED:

VISION BUSINESS PROCESS SOLUTIONS,      PEROT SYSTEMS BUSINESS PROCESS SOLUTIONS
INC.                                    INDIA PRIVATE LTD.

By: /s/ Vardhman Jain                   By: /s/ Vardhman Jain
    ---------------------------------       ------------------------------------
Name: Vardhman Jain                     Name: Vardhman Jain
Title: President                        Title: President
Date: 4/13/05                           Date: 4/13/05

ATHENAHEALTH, INC.

By: /s/ Carl Byers
    ---------------------------------
Name: Carl Byers
Title: CFO
Date: 4/13/05

                                        2

<PAGE>

                                    Exhibit A
                            Accounts Payable Services

1.   Description of Services: Upon the receipt of invoices from its vendors and
     expense reports from Athena employees, Athena will prepare the invoices and
     expense reports and scan them into Athena's server located in Waltham, MA.
     Perot Systems will access the invoices and expense reports via Perot
     Systems' Citrix application and perform the following the activities:

     A.   Invoice Entry: Perot Systems will enter the appropriate data into
          Athena's Microsoft Great Plains application ("Great Plains") in
          accordance with the Business Rules.

     B.   Invoice Approval and general Ledger Posting: Every invoice entered
          into Great Plains requires approvals from Athena's respective
          department heads that is responsible for approval of the invoice.
          Perot Systems will send out emails requesting approval of the invoice
          to such department heads. Upon receipt of the approval, Perot Systems
          will post the approved invoice into Athena's General Ledger
          application.

     C.   Vendor Set Up: If a vendor is not located in Great Plains, Perot
          Systems will send emails to the Athena respective department heads
          responsible for the invoice requesting approval to set up the vendor
          in Great Plains and approval for the invoice. Upon receipt of the
          approvals, Perot Systems will set up the vendor and post the invoice
          to the General Ledger.

     D.   Expense Report Entry: In addition to the invoices, Perot Systems will
          enter all expense reports into Great Plains that are manually created
          by the employees of Athena and received by Perot Systems in accordance
          with the Business Rules.

     E.   Expense Report Audit: In addition, Perot Systems will audit all
          employee expense reports received by Athena in accordance with
          Athena's expense report policies.

     F.   Additional Services. Upon the reasonable request of Athena and
          agreement by Perot Systems, the FTEs assigned to perform the Accounts
          Payable Services will perform additional services related to the
          Accounts Payable Services, provided that any such additional services
          that continue on an ongoing basis may require an adjustment to the
          number of FTEs provided under this Task Order in accordance with
          Section 4.C. below.

2.   Athena's Obligations: Athena will provide or perform the following in order
     for Perot Systems to perform its obligations under this Task Order.

     A.   Athena will work with Perot Systems to develop the Business Rules and
          update the Business Rules from time to time as appropriate.

     B.   Athena will scan invoices and expense accounts in a timely manner.

                                       3

<PAGE>

     C.   Athena will cause its appropriate personnel responsible for approving
          invoices and expense reports to respond to mail approvals in a timely
          manner.

     D.   Athena will provide Perot Systems will provide Perot Systems with
          access to any and all of its proprietary and third party software
          applications, including Great Plains, as required by Perot Systems to
          provide the Accounts Payable Services. Athena will pay any fees
          associated with such access.

     E.   Athena will provide Perot Systems with copies of its expense report
          policy, including prompt notice of any updates to such policy.

3    Service Level Agreement: After the ninety day (90) period following the
     Task Order Effective Date (the "Stabilization Period"), Perot Systems will
     measure its performance of the Accounts Payable Services in accordance with
     the service levels set forth below, which are further described in and
     subject to the Business Rules.

     A.   Turn Around Time: Perot Systems will use commercially reasonable
          efforts to perform the Accounts Payable Services with a turn around
          time of 2 business days for both invoice entry and expense report
          entry and audit, commencing with the business day the Perot Systems
          receives the invoices in image form via Citrix. Perot Systems will
          enter the invoices into Great Plains and send an email to the approver
          of the invoice for approval within 2 business days. For the purposes
          of this Task Order, business days are Monday through Friday, excluding
          holidays observed by Athena.

     B.   Accuracy: Perot Systems will enter invoices and expense reports into
          Great Plains in accordance with following accuracy targets:

          (i)  98% Financial Accuracy. Perot Systems will use commercially
               reasonable efforts to perform the Accounts Payable Services with
               a 98% financial accuracy rate or better. Any invoice entered by
               Perot Systems that contains one or more data entry errors in the
               "invoice amount" data field of the invoice amount is considered
               as one (1) financial error for the purposes of calculating this
               service level. If Perot Systems fails to meet this service level
               in any calendar month, Perot Systems will provide Athena with a
               credit in accordance with subsection (iii) below.

          (ii) 95% Clerical Accuracy. Perot Systems will use commercially
               reasonable efforts to perform the Accounts Payable Services with
               at 95% clerical accuracy rate or better. Any invoice entered by
               Perot Systems that contains one or more data entry errors in any
               data fields of an invoice (other than the invoice amount field)
               is considered as one (1) clerical error for the purposes of
               calculating this service level.

          (iii) Failure to Meet Financial Accuracy Service Level. If Perot
               Systems fails to meet the 98% financial accuracy service level in
               any calendar month, Perot Systems will provide a credit to Athena
               on Perot Systems next monthly invoice. The credit will be
               calculated by applying the percentage

                                       4

<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

               set forth in the table below that corresponds to the actual
               calculation of financial accuracy and multiplying that percentage
               by the total amount of Perot Systems' fees for the calendar month
               in which the failure to comply occurred.

<TABLE>
<CAPTION>
Actual Financial Accuracy   Penalty Percentage
-------------------------   ------------------
<S>                         <C>
       98% to 100%              No penalty
      95% to 97.99%                 1
      Less than 95%                 2%
</TABLE>

4.   Volume Projections / Number of FTEs Provided:

     A.   Invoice Entry: Projected volumes are * invoices and expense reports
          received by Perot Systems in calendar a month.

     B.   Vendor Set up: 15% of the invoices received and processed require that
          Perot Systems perform vendor set ups in Great Plains.

     C.   Number of FTEs Provided. Based upon the volume projections described
          above, Perot Systems will initially provide one and one half (1.5)
          FTEs to provide the Accounts Payable Services under this Task Order.
          The parties agree to meet and negotiate in good faith an appropriate
          adjustment to the number of FTEs provided by Perot Systems to perform
          the Accounts Payable Services (i) at the end of the Stabilization
          Period, (ii) at any time during the terns of this Task Order that the
          actual number of invoices and expense reports or vendor set ups exceed
          the above projections by 20% or more for three (3) consecutive months,
          or (iii) due to the need for additional FTEs as the result of
          additional services provided by Perot Systems in accordance with
          Section 1.F.

                                       5

<PAGE>

                                Task Order No. 2
                             Credit Balance Services

Vision Business Process Solutions, Inc., a Delaware corporation (f/k/a Vision
Healthsource, Inc.) with a principal place of business at 8000 Towers Crescent
Drive, Suite 1350, Vienna, VA ("Vision"), Perot Systems Business Process
Solutions India Private Limited, an India corporation (f/k/a Vision Healthsource
India Private Ltd.), with a principal place of business at DP 110 (Second Phase)
F-19, Industrial Estate, Ambattur, Chennai, 600 058, India ("Healthsource"), and
athenahealth, Inc., a Delaware corporation with a principal place of business at
One Moody St., Waltham, MA 02453 ("Athena") hereby enter into this Task Order
No. 2 under that certain Services Agreement dated December 9, 2002 between the
Parties (the "Agreement"), as amended, including but not limited to as amended
by the Second Amendment to Services Agreement dated March 8, 2005 (the "Second
Amendment"; the Agreement as so amended is referred to as the "Amended
Agreement"), on the following terms, on the following terms. Vision and
Healthsource are collectively referred to as "Perot Systems". Except as
otherwise defined herein, all capitalized terms used herein shall have the same
meaning as in the Agreement or the Second Amendment, as the case may be.

1.   Term. This Task Order will commence on March 7, 2005 (the "Task Order
     Effective Date") and will continue until December 31, 2005 unless earlier
     terminated in accordance with the Amended Agreement or in accordance with
     Section 2(a) below.

2.   Perot Systems Obligations. Perot Systems will utilize Athena's athenaNet(R)
     System to provide the credit balancing services described in Exhibit A
     attached hereto ("Credit Balances Services") to assist Athena in resolving
     credit balances on lists of credit balance medical claims provided to Perot
     Systems by Athena in accordance with Section 3 ("Claims") Perot Systems
     will document the Credit Balance Services performed for each Claim either
     by entries in Athena's system or on separate problem logs that will be
     uploaded to Athena separately. As part of the Credit Balancing Services,
     Claims may be resolved either with or without follow up and the work
     required may differ with respect to each type of Claim.

     (a)  Initial Claims. On or about the Task Order Effective Date, Athena will
          provide Perot Systems with a work List containing 1000 Claims
          ("Initial Claims"). Perot Systems will perform the Credit Balance
          Services for the Initial Claims. Upon completion of such services,
          Athena may terminate this Task Order without penalty by providing
          Perot Systems with written notice.

     (b)  Credit Balance Services. Provided that Athena does not terminate the
          Task Order in accordance with Section 2(a), the Credit Balance
          Services performed on an ongoing basis (after the Initial Claims) will
          be performed by Perot Systems in a professional and diligent manner
          and in a manner at least as accurate and diligent as the work
          performed with respect to the Initial Claims.

3.   Athena's Obligations. Athena will provide or perform the following in order
     for Perot Systems to perform the Credit Balance Services:

                                       6

<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

     (a)  On or about the Task Order Effective Date, Athena will provide Perot
          Systems with a work list containing the Initial Claims.

     (b)  Provided that Athena does not terminate this Task Order in accordance
          Section 2(a), upon completion of the Credit Balance Services for the
          Initial Claims, on or about the second day of each month during the
          remainder of the term of this Task Order, Athena will provide Perot
          Systems with a work list that contains credit balance Claims.

4.   Charges.

     (a)  In addition to all amounts payable under the Agreement, Athena will
          pay Perot Systems the following amounts in accordance with Section
          2)b) of the Amended Agreement:

          (i)  Each month during the term of this Task Order, Perot Systems will
               charge and Athena will pay a fee of US$* for each Claim fully
               processed according to this work order by Perot Systems during
               the prior month. Invoices will be due and payable in accordance
               with Section 2.c) of the Agreement.

     (b)  Perot Systems' charges set forth above, will be increased annually on
          the anniversary of the Task Order Effective Date to reflect the
          increase, if any, in the Employment Cost index, Total Compensation,
          Not Seasonally Adjusted, Private Industry for Professional Specialty
          and Technical Occupations published by the Bureau of Labor Statistics
          of the United States Department of Labor (the "ECI"), over the
          preceding anniversary of the Task Order Effective Date.

                                       7

<PAGE>

AGREED:

VISION BUSINESS PROCESS SOLUTIONS,      PEROT SYSTEMS BUSINESS PROCESS SOLUTIONS
INC.                                    INDIA PRIVATE LTD.

By: /s/ Vardhman Jain                   By: /s/ Vardhman Jain
    ---------------------------------       ------------------------------------
Name: Vardhman Jain                     Name: Vardhman Jain
Title: President                        Title: President
Date: 4/13/05                           Date: 4/13/05

ATHENAHEALTH, INC.

By: /s/ L. Elizabeth Seeley
    ---------------------------------
Name: L. Elizabeth Seeley
Title: COO
Date: 4/12/05

                                       8

<PAGE>

                                    Exhibit A
                             Credit Balance Services

Credit Balance Services has two components - Processing and Follow Up, as
described below:

1)   Processing:

     a)   Perot Systems will review each Claim to determine the process by which
          and the reason why the Claim obtained a credit, and will assign each
          claims assigned to one of the following classifications, accurately
          reflecting such process and reason:

          (i)  Duplicate payment by same insurance company;

          (ii) Duplicate posting by the payment poster;

          (iii) Wrong posting or posting error;

          (iv) Multiple insurance companies paying as primary;

          (v)  Multiple insurance companies paying as secondary;

          (vi) Interest payment;

          (vii) Lack of coordination of benefits (COB);

          (viii) Primary or secondary over paid as per their fee schedule; and

          (ix) Other reasons.

     b)   Perot Systems will perform the Claim review by opening Athena's
          document management system and looking at the explanation of benefits
          (FOB) and determining how and who made the over payment.

     c)   Once the reason for overpayment is identified, Perot Systems will
          accurately record the classification and take the appropriate action,
          which may consist of, but not be limited to, one or more of the
          following, as consistent with standards and instructions provided to
          Perot Systems by Athena from time to time:

          (i)  Send the Claim to Athena with instructions ("Instructions"),
               which consist of advising which insurance company Athena should
               contact, the amount to reference and what information should be
               asked of the insurance company in order to resolve the credit
               balance.

          (ii) Enter a problem log entry for Athena to reverse the postings;

          (iii) Enter a problem log entry for Athena to correct the postings;
               and (iv) Enter a post kick code and claim note in the software.

                                       9

<PAGE>

     d)   Perot Systems will document the Instructions, problem logs, kick code,
          and claim notes in Athena's system.

2)   Follow Up:

     a)   Perot Systems will view each Claim in Athena's system as well as the
          associated EOB and will read all the Instructions and problem logs.

     b)   Perot Systems will confirm the overpayment to the appropriate
          insurance company by telephone which includes the amount, check# etc
          and also the refund address if that company does not have a take back
          facility.

     c)   Once 2.(b) is completed, Perot Systems will document the Claim notes
          and the kick codes in a spreadsheet and return to the Athena.

     d)   On appropriate Claims, Perot Systems will call multiple insurance
          companies to confirm with such insurance companies (in case 2
          insurance companies are paying as primary/secondary) as to which
          company was supposed to make the payment.

     e)   If both insurance companies say they are the primary/secondary then
          the Claim will designated by Perot to be forwarded to the provider and
          instructions documented in Athena's system to the provider to get the
          information from the patient. This is done through the Claim note sent
          via a spreadsheet.

     f)   Exceptions are if the insurance company is not able to identify the
          over payment and requires time to audit and call back Some of these
          situations are appropriately documented in Claim notes and some in the
          problem logs, as instructed by Athena.

     g)   The kick code and claim note is entered by Perot Systems into a
          spreadsheet or a problem log that is uploaded to Athena.

                                       10
<PAGE>

                                TASK ORDER NO. 3
                        CLINICAL DATA PROCESSING SERVICES

Vision Business Process Solutions, Inc., a Delaware corporation with a principal
place of business at 2300 West Plano Parkway, Plano, Texas 75075 ("Vision"),
Perot Systems Business Process Solutions India Private Limited, a Company
incorporated under the laws of India, with a principal place of business at A9,
1st Main Road, Ambattur Industrial Area, Chennai, 600 058, India
("Healthsource"), and Athenahealth, Inc., a Delaware corporation with a
principal place of business at 311 Arsenal Street, Watertown, MA 02472
("Athena") hereby enter into this Task Order No. 3 under that certain Services
Agreement dated December 9, 2002 between the Parties (the "Agreement"), as
amended, including Amendment No. 1 dated October 13, 2004, Amendment No. 2 dated
March 8, 2005, and Amendment No. 3 dated April 12, 2006 (together, the
"Agreement") on the following terms. Vision and Healthsource are collectively
referred to as "Perot Systems." Except as otherwise defined herein, all
capitalized terms used herein shall have the same meaning as in the Agreement or
its amendments, as the case may be.

1. Term. This Task Order will commence on June 13, 2006 (the "Task Order
Effective Date") and will continue, unless earlier terminated in accordance with
the Agreement, for an initial pilot period through July 31, 2006 (the "Pilot
Period"), after which Athena may in its discretion extend the term of this Task
Order through December 31, 2006 by giving written notice thereof. Subject to
agreement on rates and services, this Task Order may be extended by mutual
written agreement of the parties, provided that the parties have agreed to
extend the term of the Agreement as set forth in Section 3(a) of the Agreement.

2. Services. Perot Systems will utilize Athena's athenaNet(R) System to provide
the clinical data processing services described in Exhibit A attached hereto
("Clinical Services") to assist Athena in sorting, classifying, routing, and
entering data from documents received by Athena as part of its clinical service
workflow. The Clinical Services will be performed in accordance with and
governed by the business rules document ("Business Rules"), which will be
mutually agreed to by the parties prior to initiating the Clinical Services and
updated by mutual agreement of the parties from time to time during the term of
this Task Order.

3. Athena Obligations. In addition to its obligations under the Agreement,
Athena will perform its obligations specified in Section 2 of Exhibit A.

4. Charges.

     Perot Systems will charge Athena for Perot Systems services under this Task
Order at the following rates:

                                     Page 1

<PAGE>
Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

     i)   Effective from June 13 2006, Perot Systems shall charge Athena for
          Clinical Services for Perot Systems employees without a Clinical
          Background, as hereinafter defined, at the rate of US $* per hour
          per Perot Systems resources on a full time equivalent (FTE) basis
          (each such Perot Systems herein after referred to as FTE).

     ii)  Effective from June 13 2006, Perot Systems shall charge Athena for
          Clinical Services for Perot Systems employees with a Clinical
          background at the rate of US $* per hour per (FTE).

     iii) For this purpose the term "Clinical Background" means possessing the
          clinical practice background and qualifications as mutually agreed to
          by the parties. It is agreed that during the Pilot Period the
          individuals allocated to provide Clinical Services will be 50% those
          without a Clinical Background and 50% those with a Clinical
          Background. After the Pilot Period, the parties shall mutually
          determine the appropriate breakdown for such individuals based on the
          nature of the Clinical Services work.

     iv)  Perot Systems will invoice Athena on a monthly basis. Athena shall
          make complete payment of the invoiced amounts to Perot Systems within
          thirty (30) days from the date of the invoice. Athena shall pay to
          Vision the complete invoiced amounts without any deduction on account
          of non-payment by the clients of Athena. Late payments shall attract
          interest from the due date at the lesser of (i) one and a half percent
          per month, to accrue on a daily basis with monthly rests and to run
          from the due date until payment of such amount in full, or (ii) the
          maximum rate permitted by law.

     (iv) Perot Systems shall maintain detailed time records documenting the
          hours worked by each FTE on the Clinical Services, which shall be made
          available on monthly basis to Athena for review at Athena's request.

(b)  Cost of Living Adjustment.

     The cost of living adjustment index shall be based on the information made
     available by Reserve Bank of India (RBI) for each year, in the website
     below.

     http://www.rbi.org.in/scripts/PublicationsView.aspx?id=7263#7

     The parties will refer to the Harmonized Index of Consumer Prices (HICP)
     for Consumer Price Inflation (CPI) - Urban non Manual employees index
     shared by RBI (Reserve Bank of India) in the above website link. This index
     is proposed since it is released by RBI (Reserve Bank of India, Apex Bank
     regulated by the Government of India) and also is the closest index
     available for cost of living and urban population. For instance, the cost
     index for the year 2004-2005 has been at 5%. With respect to the rates for
     charges stated in this Task Order, commencing on the first anniversary of
     the Effective Date and on each anniversary thereafter

                                     Page 2

<PAGE>

     during the term of the Task Order, such rates, applicable from time to time
     to the Task Order, will be increased, with effect from each anniversary, by
     the percentage as released by RBI for the above referred index.

     (c)  Taxes. Athena shall pay all excise, use and sales taxes levied in
          connection with this Task Order in accordance with Section 2)a) of the
          Agreement.

5. Indemnification. The provisions of this Section 5 shall apply beginning on
the first date that Perot Systems starts providing Clinical Services under this
Task Order following the Pilot Period. Perot Systems shall defend, indemnify and
hold harmless Athena and its directors, officers, employees and agents, from and
against any third party claims, losses, actions, demands, liabilities or
damages, including reasonable attorneys' fees (collectively "Losses") resulting
in bodily injury or death of a person arising as a proximate result of incorrect
data entered in data fields in AthenaNet by Perot Systems under this Task Order.
Notwithstanding anything to the contrary contained herein in this Task Order or
under the Agreement, Perot Systems aggregate liability for the indemnification
obligations described in this Section 5 shall in no event exceed the total
amount of fees paid or payable by Athena to Perot Systems under this Task Order
during the 12 month period immediately preceding the date of any such claim
(excluding amounts paid as reimbursement of expenses or taxes). The procedures
set forth in Section 13) c) of the Agreement shall apply to any indemnification
sought under the foregoing provision.

6. Insurance. The provisions of this Section 6 shall apply beginning on the
first date that this Task Order is in effect following the Pilot Period. Perot
Systems agrees to maintain in full force throughout the term of this Task Order,
and any subsequent task order or agreement covering the provision of Clinical
services, a policy of commercial general liability under which Perot Systems is
the named insured and Athena is named as an additional insured. Each such policy
shall provide thirty (30) days' prior notice of cancellation to Athena, and
certificate thereof shall be delivered to Athena. The minimum limits of
liability of such insurance shall be $10 million per occurrence and $20 million
annual aggregate. The insurance required to be maintained by Perot Systems
pursuant to this Task Order shall be maintained with companies which have a
rating of at least "A-" and are within a financial size category of not less
than "Class VIII" in the most current Best's Key rating Guide.

                    [SIGNATURES APPEAR ON THE FOLLOWING PAGE]

                                     Page 3

<PAGE>

AGREED:

VISION BUSINESS PROCESS SOLUTIONS,      PEROT SYSTEMS BUSINESS PROCESS
INC.                                    SOLUTIONS INDIA PRIVATE LIMITED

By: /s/ Vardhman Jain                   By: /s/ Vardhman Jain
    ---------------------------------       ------------------------------------
Name: VARDHMAN JAIN                     Name: VARDHMAN JAIN
Title: MANAGING DIRECTOR                Title: MANAGING DIRECTOR
Date: JUNE 15, 2006                     Date: JUNE 15, 2006

ATHENAHEALTH, INC.

By: /s/ Diane Kaye
    ---------------------------------
Name: Diane Kaye
Title: VP Product Management
Date: June 15, 2006

                                     Page 4

<PAGE>

                                    EXHIBIT A
                                CLINICAL SERVICES

1. Description of Services. Athena will prepare the relevant documents
containing clinical data (the "Documents") and import them into Athena's
servers. Perot Systems will access the Documents through athenaNet(R) and
conduct the following activities with respect to the Documents in accordance
with the Business Rules:

     a. Classification. Perot Systems will identify the Document type and
     classify each Document in athenaNet in accordance with the Business Rules.
     Perot Systems will also, if applicable and in accordance with the Business
     Rules, identify the patient, to whom a Document applies by reviewing the
     unique identifiers in each relevant Document.

     b. Data Entry. Perot Systems will enter appropriate data into the relevant
     fields in athenaNet in accordance with the Business Rules.

     c. Quality Assurance. Perot Systems will perform quality assurance steps on
     each Document by comparing the information that Perot Systems enters in
     AthenaNet to the data contained within each Document, in accordance with
     quality assurance measures as mutually agreed between Athena and Perot
     Systems. In addition, Athena and Perot Systems shall work together during
     the term of this Task Order to develop formal, written Clinical Services
     quality assurance specifications (the "QA Specifications") which shall
     apply upon approval by Athena and Perot Systems. Prior to approval of the
     QA Specifications, quality assurance shall be performed by both Perot
     Systems and Athena. Upon such approval of the QA Specifications, Perot
     Systems shall assume full responsibility for quality assurance with respect
     to the Clinical Services.

2.   Athena's Obligations. Athena will provide or perform the following in order
     for Perot Systems to perform its obligations under this Task Order:

     a.   Athena will work with Perot Systems to develop the Business Rules and
          to update the Business Rules from time to time as appropriate, and
          will provide Perot Systems with such updated Business Rules when they
          are available.

     b.   Athena will import the Documents into athenaNet in a timely manner.

     c.   Athena will work with Perot Systems to provide regular training
          updates as new functionality is introduced into the system, and will
          provide related documentation to Perot Systems as it becomes
          available.

     d.   Athena will provide Perot Systems with such level of athenaNet access
          as is necessary to provide the services under the Task Order.

                                     Page 5

<PAGE>

Perot Systems shall not be liable for any delay or failure in performing its
obligations, incase if such delay or failure is attributable to any delay or
failure of Athena to perform its obligation's as set out herein or under the
Agreement in a timely manner.

3. Service Level Agreement. Following the Pilot Period, Perot Systems will
measure its performance of the Clinical Services in accordance with the service
levels set forth below, which may be further described in, and are subject to,
the Business Rules.

     a. Turn Around Time. Perot Systems will use commercially reasonable efforts
to complete processing of each Document received in a day within four (4) hours,
from the hour and minute that image of a Document is imported into AthenaNet.
Provided however that abovementioned Turn around time shall not be applicable in
cases where i) the Document is illegible or incomplete or ii) Perot Systems
inability to access AthenaNet for reasons not attributable to Perot Systems. For
purposes of this Task Order, "business days" are Monday through Saturday of each
week, 5:30 a.m. through 9:30 p.m. Eastern Standard Time (subject to adjustment
to account for time change during daylight savings time), including United
States national and holidays and including all holidays observed by Athena.

     b. Accuracy.

          i. Perot Systems will perform the Clinical Services at an accuracy
     rate of at least 99%. For purposes of this task order, the accuracy rate
     shall be equal to 100% less the percentage of data fields in which data is
     entered incorrectly or not entered in relation to the total number of data
     fields in which data was or should have been entered.

          ii. Failure to Meet Accuracy Level. For any given month, Athena shall
     notify Perot Systems in writing of Perot Systems ' failure to meet the 99%
     accuracy rate agreed to in this Exhibit A, Section 3.b(i) for such month,
     no later than a period of 30 days from the end of the subject month. The
     parties shall mutually work together in good faith to resolve the issues.
     If both the parties agree that the error rate for the subject month is
     between 95% to 98.99% while processing the Clinical Service, then Perot
     Systems agrees to provide a credit of 1% of total amounts invoiced to
     Athena for the subject month and if the error rate is less than 95%, then
     Perot Systems agrees to provide a credit of 2% of total amounts invoiced to
     Athena for the subject month, which shall be deducted from the forthcoming
     month's invoice. Notwithstanding anything to the contrary contained herein,
     Athena shall not be entitled to such credit of 1% of the invoiced amount if
     delays or failure of Perot System in meeting the accuracy percentage is on
     account of illegible, missing or incomplete data received from Athena or
     for any other fault attributable to Athena.

          iii. The parties shall work together on an ongoing basis to identify
     and resolve quality issues in a mutually agreeable manner, using the best
     tools and methods currently available to the respective parties.

                                     Page 6

<PAGE>

4. Volume and Staffing. Perot Systems and Athena shall confer on a regular basis
to (i) analyze the volume and nature of the Clinical Services, and (ii) validate
or revise the appropriate staffing levels and composition in accordance with
such analysis.

                                     Page 7

<PAGE>

Amendment to Athena Task Order 3

THIS Amendment (the "Amendment") is made on this January 11, 2007 to the Task
Order No. 3 (the "Task Order") effective June 13, 2006

by and between

Vision Business Process Solutions, Inc., (formerly known as "Vision
Healthsource, Inc.+), a Delaware Corporation, having its principal place of
business at 2300, West Plano Parkway, Plano, Texas 75075, hereinafter referred
to as "Vision', which expression shall, unless repugnant to the context or
meaning, mean and include its successors and permitted assigns;

Perot Systems Business Process Solutions India Private Limited having its office
at, A9, 1st Main Road, Industrial Estate, Ambattur, Chennai -600058 (hereinafter
referred to as "PSBPS'), which expression shall, unless repugnant to the context
or meaning thereof, include its successors and permitted assigns) on one hand.

And

Athenahealth, Inc., a Delaware Corporation, having its principal place of
business at 311 Arsenal Street, Watertown, MA 02472, hereinafter referred to as
"Athena', which expression shall, unless repugnant to the context or meaning,
mean and include its successors and permitted assigns; ON THE OTHER HAND

Vision and Healthsource are collectively referred to in this Amendment as "Perot
Systems'.

WHEREAS Perot Systems and Athena are parties to the Agreement; and

WHEREAS Perot Systems and Athena desire to amend the Task Order in accordance
with the terms of this Amendment;

NOW THE PARTIES AGREE AS FOLLOWS:

     1.   This Amendment shall be effective commencing on from January 1, 2007
          ("Effective Date').

<PAGE>
Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

     2.   The Parties acknowledge and agree that from the Effective Date
          notwithstanding anything to the contrary in the Task Order, the
          following clauses of the Task Order shall be amended to read as
          follows:

          i) Clause(1) Term -- Clinical Data Processing Services Task Order

          Clause (1) -- The term of the Task Order shall be amended in its
          entirety to read as follows:

          The initial term of this Task Order shall be from June 13, 2006 until
          December 31, 2006 (the "Initial Term'). Upon expiration of the Initial
          Term this Task Order will renew for an additional term of six (6)
          months, following which the Task Order shall renew automatically for
          consecutive six (6) month terms unless otherwise terminated as
          provided herein or in the Agreement. Notwithstanding the foregoing,
          either party may terminate this Task Order with or without cause,
          effective at the end of the then current term (including the Initial
          Term) by providing the other party written notice of its intent to
          cancel at least sixty (60) days prior to the expiration of the then
          current term.

          ii) Clause (4) -- Charges

          Clause (4) -- Charges of the Clinical Data Processing Services shall
          include the following:

          Beginning from June 13, 2006 for the entire term of this Task Order,
          the ramp-up pricing for Perot Systems new Individual resources on a
          full time equivalent (FTE) basis (each such Perot Systems individual
          resources are herein referred to as "FTE') on Clinical Services for
          Perot Systems new resources without Clinical Background and with
          Clinical Background shall be charged at fifty percent (50%) for the
          first twenty (20) business days and seventy-five percent (75%) for the
          next twenty (20) business days (the "Ramp-up Period') following the
          date that such individual resource began work on the Clinical Services
          pursuant to this Task Order. During this period Perot Systems shall
          charge for the new FTEs without Clinical Background at the rate of
          US$* and with Clinical Background at the rate of US$*.

          After the completion of the ramp-up period Perot Systems shall charge
          Athena for Clinical Services for Perot Systems resources without
          Clinical Background at the rate of US$* and with Clinical Background
          at the rate of US$* per hour per FTE.

          iii) Clause (5) -- Indemnification

          Clause (5) -- Indemnification of the Clinical Data Processing Services
          to the Task Order shall be amended in its entirety to read as follows:

          The provisions of this Section 5 shall apply beginning on the first
          date that Perot Systems starts providing Clinical Services under this
          Task Order

<PAGE>

          following the Pilot Period. Perot Systems shall defend, indemnify and
          hold harmless Athena and its directors, officers, employees and
          agents, from and against any third party claims, losses, actions,
          demands, liabilities or damages, including reasonable attorneys' fees
          (collectively "Losses") resulting in bodily injury or death of a
          person arising as a proximate result of incorrect data entered in data
          fields in AthenaNet by Perot Systems under this Task Order.
          Notwithstanding anything to the contrary contained herein in this Task
          Order or under the Agreement, Perot Systems aggregate liability for
          the indemnification obligations described in this Section 5 shall in
          no event exceed the total amount of fees paid or payable by Athena to
          Perot Systems under this Task Order during the 30 month period
          immediately preceding the date of any such claim (excluding amounts
          paid as reimbursement of expenses or taxes). The procedures set forth
          in Section 13) c) of the Agreement shall apply to any indemnification
          sought under the foregoing provision.

3.   All terms and conditions agreed earlier in the Master Services Agreement,
     Amendments and Task Orders remain and continue to apply unchanged unless
     the same have been amended in this Amendment.

IN WITNESS WHEREOF, each of the Parties have caused this Amendment to be duly
executed by their duly authorized representatives.

For Perot Systems Business Process      For Athenahealth, Inc.
Solutions India Private Limited

By: /s/ Vardhman Jain                   By: /s/ James M. MacDonald
    ---------------------------------       ------------------------------------
Name: Vardhman Jain                     Name: JAMES M. MACDONALD
Title: Managing Director                Title: CHIEF OPERATING OFFICER

For Vision Business Process Solutions,
Inc

By: /s/ Vardhman Jain
    ---------------------------------
Name: Vardhman Jain
Title: Managing Director

<PAGE>

                    TASK ORDER 4 TO ATHENA SERVICE AGREEMENT

This Task Order (the "Task Order") is entered into on this August 23, 2006 under
the Master Services Agreement dated December 9, 2002, executed amongst
Athenahealth, Inc., ("Athena"), Vision Business Process Solutions Inc., (VBPS)
and Perot Systems Business Process Solutions India Private Limited hereinafter
called "PSBPS").

1.   Term:

     This Task Order shall be in effect for a period of thirty-six (36) months
     (the "Initial Term") from November 30th, 2005 (the "Effective Date")
     subject to the Master Service Agreement dated December 9, 2002 being in
     force. Upon expiration of the Initial Term, this Task Order will
     automatically be renewed for consecutive additional terms of two (2) years
     each. Notwithstanding the foregoing, either party may terminate this Task
     Order with or without cause, effective at the end of the then current term
     (including the Initial Term) by providing the other party written notice of
     its intent to cancel at least sixty (60) days prior to the expiration of
     the then current term.

2.   Scope of Work:

     Under the terms and conditions of this Task Order, VBPS shall provide the
     following services:

     i)   POSTING ANALYSIS - This service entails running the work list from
          AthenaNet based on the instruction from Athena, this work list, along
          with the details of allotment would be placed in the local server, to
          be accessed by the Posting Analysts. The Posting Analysts would work
          the batches in AthenaNet as per the priority value (MSC Day and High
          dollar value batches first). The Posting Analyst's work is to
          accurately resolve the transactions belonging to the batch that did
          not get posted to AthenaNet for different reasons. The different
          reasons are as follows, No Matching Charge, Partially Posted,
          Tentatively Discarded, Match Record Failed to Post and Unmapped Kick
          code. The service also involves discarding records and to post
          transactions manually based on request. Perot should also be required
          to communicate any uncompleted batches, absences, or other items that
          may cause us to forfeit an MSC with clients. The TAT is to complete
          all the batches of priority clients within three (3) business days and
          Non-Priority clients within four (4) business days of batch opening.

     ii)  PAYMENT BATCH CONSTRUCTOR - Users review images in a parent batch,
          identify and execute any divisions necessary to prepare batches
          appropriate for data entry and for the ERA team. Batches are split and
<PAGE>
Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

          routed to optimize EDI utilization and specialization of data entry
          staff, following lists of payors and clients to be handled separately.
          The TAT is to complete processing the zip files received within twelve
          (12) hours from the time the files are entered in the processing
          folder.

     iii) DAILY VOLUME: VBPS will accommodate daily volume variations of
          Transactions 30% greater than projected average daily volume, subject
          to the availability of resources based on the requirement that Athena
          has informed VBPS to staff up with for the said processes of Payment
          Analysis and Payment Batch Constructor. For example, if the Client
          projects an average volume of 1000 Transactions per day, VBPS will be
          able to process up to 1300 Transactions on any given day. Any volume
          of Transactions in excess of 30% will not be subject to their
          respective turnaround time captured in Sec. 2(i) and (ii) above. Also
          the abovementioned Turn around time in Sec. 2(i) and (ii) above shall
          not be applicable in cases where i) the Document is illegible or
          incomplete or ii) VBPS inability to access AthenaNet for reasons not
          attributable to VBPS.

3.   Price:

     i) Beginning from November 30, 2005 for the entire the term of this Task
     Order, the ramp-up pricing for VBPS new resources on a full time equivalent
     (FTE) basis (each such VBPS resources are herein referred to as "FTE") on
     Posting Analysis and new FTE on Payment Batch Constructor shall be charged
     at fifty percentage (50%) for the first twenty two (22) business days (the
     "Ramp-up Period") from their respective corresponding go-live date. During
     this period VBSP shall charge for the new FTE on Posting Analysis and new
     FTE on Payment Batch Constructor at the rate of US $ * per hour per full -
     time equivalent (FTE) for Normal Time and US $ * per hour per full - time
     equivalent (FTE) for Over Time. After the completion of the ramp-up period
     VBPS shall charge Athena for the Services of Posting Analysis and Payment
     Batch Constructor as per the rate mentioned in C1.3(ii) of this Task Order
     4."

     ii) From December 30, 2005 VBPS will charge Athena for the VBPS Services
     under this Task Order at the following rates: -

<TABLE>
<CAPTION>
                                              OVER TIME
                               NORMAL TIME    RATES PER
SERVICE                      RATES PER HOUR      HOUR
-------                      --------------   ---------
<S>                          <C>              <C>
Posting Analysis (Per FTE)        US $*        US $*
Payment Batch Constructor
   (Per FTE)                      US $*        US $*
</TABLE>

     iii) VBPS will invoice Athena on a monthly basis. Athena shall make
     complete payment of the invoiced amounts to VBPS within thirty (30) days
     from the date

<PAGE>

     of the invoice. Athena shall pay to VBPS the complete invoiced amounts
     without any deduction on account of non-payment by the clients of Athena.
     Late payments shall attract interest from the due date at the lesser of (i)
     one and a half percent per month, to accrue on a daily basis with monthly
     rests and to run from the due date until payment of such amount in full, or
     (ii) the maximum rate permitted by law.

4.   Cost of Living Adjustment.

     The cost of living adjustment index would be based on the information made
     available by Reserve Bank of India (RBI) for each year, in the website
     below.

     http://www.rbi.org.in/scripts/PublicationsView.aspx?id=7263#7

     We would be referring to the Harmonized Index of Consumer Prices (HICP) for
     Consumer Price Inflation (CPI) - Urban non Manual employees index shared by
     RBI (Reserve Bank of India) in the above website link. This index is
     proposed since it is released by RBI (Reserve Bank of India, Apex Bank
     regulated by the Government of India) and also is the closest index
     available for cost of Living and urban population. For instance, the cost
     index for the year 2004-2005 has been at 5%. With respect to the rates for
     charges stated in this Task Order, commencing on the first anniversary of
     the Effective Date and on each anniversary thereafter during the term of
     the Task Order, such rates, applicable from time to time to the Task Order,
     will be increased, with effect from each anniversary, by percentage as
     released by RBI for the above referred index.

5.   Other Terms:

     PSBPS and Athena will separately do a time study, mutually agree and
     document the turnaround times, quality, auditing and other compliance
     requirements and obligations.

AGREED:

Vision Business Process Solutions,      Athenahealth, Inc.
Inc.

By: /s/ Vardhman Jain                   By: /s/ Ralph Catalano
    ---------------------------------       ------------------------------------
Name: Vardhman Jain                     Name: RALPH J CATALANO
Title: Managing Director                Title: Vice President
Date: 8/23/06                           Date: 8/23/06

<PAGE>

                        TASK ORDER 5 TO SERVICE AGREEMENT

This Task Order (the "Task Order") is entered into on this October 13, 2006
under the Master Services Agreement dated December 9, 2002, read in conjunction
with Amendment No. 1 dated October 13, 2004, Amendment No. 2 dated March 8,
2005, and Amendment No. 3 dated April 12, 2006 (together, the "Agreement")
executed amongst Athenahealth, Inc., ("Athena"), Vision Business Process
Solutions Inc., (VBPS) and Perot Systems Business Process Solutions India
Private Limited (formerly know as "Vision Healthsource India Private Limited and
hereinafter called "PSBPS").

1.   Term:

     This Task Order shall be in effect for a period of thirty-six (36) months
     (the "Initial Term") from March 21st 2006 (the "Effective Date") subject to
     the Master Service Agreement dated December 9, 2002 being in force. Upon
     expiration of the Initial Term, this Task Order will automatically be
     renewed for consecutive additional terms of two (2) years each.
     Notwithstanding the foregoing, either party may terminate this Task Order
     with or without cause, effective at the end of the then current term
     (including the Initial Term) by providing the other party written notice of
     its intent to cancel at least sixty (60) days prior to the expiration of
     the then current term.

2.   Scope of Work:

     Under the terms and conditions of this Task Order, VBPS shall provide the
     following services:

     i)   PAYTO - This service entail work on claims which are moved to Payto
          Bucket in claim tracking, in order to check whether the Providers
          Payto address is correct. The Payto datase is copied and saved from
          Citrix to the Local Drive. Claims are then allotted to each Enrollment
          Analyst, in an excel worksheet saved in the local disk. The Analyst
          then places a call to the Payor, to verify the accuracy of the Payto
          address. Once the Payor has verified the correct Payto address, then
          the same is documented on the AthenaNet with effective date and
          appropriate kick code. Else, the required documents (w9, request
          letter, Payor form) are faxed to the Payor to change the address.

     ii)  PAYTO CHANGE- - The service entails confirming with the Payor that the
          address change request has been completed properly. This confirmation
          consists of a follow up call after the address change request has been
          sent. The Enrollment Analyst calls the Payor, to verify if the Payto
          address has been updated as requested. If the Payor has the correct
          Payto address, then it will be documented in the AthenaNet with the
          effective date and appropriate Kick code; else, the required documents
          (w9, request letter,

<PAGE>

          Payor form) are faxed to the Payor to request that the change in the
          address be made.

     iii) LOCKBOX MIGRATIONS - The Service entail to changing the billing
          address for an entire medical group. In this process, documentation is
          done on the Citrix and not on AthenaNet. A list of Payors is entered
          into an excel spreadsheet and saved to Citrix. The Analyst then places
          calls to the Payor and confirms their process for changing Payto
          addresses. The required documents (w9, request letter, Payor form) are
          then faxed to the Payor to change the address. The enrollment analysts
          make follow up phone calls to the Payor until the new Payto address
          has been confirmed with all Payors.

     iv)  ELIGIBILITY ERROR REPORT - The Service entails working a list of
          eligibility enrollment errors, which are saved to an excel spreadsheet
          on Citrix. Enrollment analysts review the spreadsheet and refer to the
          Payor Set-up Guide to determine the eligibility enrollment process for
          Payors and clearinghouses. The Enrollment Analysts then follow the
          process outlined in the Payor Set-up Guide to complete enrollment.

     v)   BAD PAY TO ERRORS - The service entails working a list of pay to
          errors outside of athenaNet, which are saved to an excel spreadsheet
          on Citrix. The Analyst places a call to the Payor, to verify that the
          Payor has the correct Payto address. If the Payor has the correct
          Payto address then the same is documented on the spreadsheet. Else,
          the required documents (w9, request letter, payor form) are faxed to
          the Payor with a request that they change the address.

     vi)  SMALL GROUPS IMPLEMENTATIONS - The service entails completion of all
          necessary enrollment work required to bring a practice live on
          athenaNet. Enrollment analysts call Payors to verify provider and
          group numbers; complete enrollment paperwork to enroll clients for
          electronic transactions, including E-Claims, Electronic Remittance
          Advice, eligibility and Electronic Funds Transfer; follow up with
          Payors to make sure enrollment paperwork is approved; and change the
          practice's Pay To address with Payors.

3.   Price:

     i)   Beginning March 21,2006 and extending for the entire term of this Task
          Order, the ramp-up pricing for VBPS's new resources on a full time
          equivalent (FTE) basis (each of such VBPS resource are hereinafter
          referred to as "FTE") on Payto, Payto Change, Lockbox Migrations,
          Eligibility Error Report, Bad Pay to Errors and Small Groups
          Implementations shall be charged at fifty percent (50%) for the first
          twenty two (22) business days (the "Ramp-up Period") from their
          respective corresponding Go-Live date. During this period VBPS shall
          charge Athena for the new FTE on Payto, Payto Change, Lockbox
          Migrations,

<PAGE>
Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

          Bad Pay to Errors and Small Groups Implementations at the rate of US $
          * per hour per full - time equivalent (FTE), Eligibility Error Report
          at the rate of US $ * per hour per full - time equivalent (FTE) for
          Normal Time and US $* per hour per full - time equivalent (FTE) for
          Over Time. After the completion of the ramp-up period VBPS shall
          charge Athena for the Services of Payto, Payto Change and Lockbox
          Migrations as per the rate mentioned below in Cl.3(ii) of this Task
          Order.

          ii) From April 21, 2006 VBPS will charge Athena for the VBPS Services
          under this Task Order at the following rates:-

<TABLE>
<CAPTION>
                            NORMAL TIME RATES    OVER TIME RATES
SERVICE                     PER HOUR (PER FTE)       PER HOUR
-------                     ------------------   ---------------
<S>                         <C>                  <C>
Payto                              US $*             US $*
Payto Change                       US $*             US $*
Lockbox Migrations                 US $*             US $*
Eligibility Error Report           US $*             US $*
Bad Pay To Errors                  US $*             US $*
Small Groups
Implementations                    US $*             US $*
</TABLE>

     iii) VBPS will invoice Athena on a monthly basis. Athena shall make
     complete payment of the invoiced amounts to VBPS within thirty (30) days
     from the date of the invoice. Athena shall pay to VBPS the complete
     invoiced amounts without any deduction on account of non-payment by the
     clients of Athena. Late payments shall attract interest from the due date
     at the lesser of (i) one and a half percent per month, to accrue on a daily
     basis with monthly rests and to run from the due date until payment of such
     amount in full, or (ii) the maximum rate permitted by law.

4.   Cost of Living Adjustment.

     The cost of living adjustment index would be based on the information made
     available by Reserve Bank of India (RBI) for each year, in the website
     below.

     http://www.rbi.org.in/scripts/PublicationsView.aspx?id=7263#7

     We would be referring to the Harmonized Index of Consumer Prices (HICP) for
     Consumer Price Inflation (CPI) - Urban non Manual employees index shared
     by RBI (Reserve Bank of India) in the above website link. This index is
     proposed since it is released by RBI (Reserve Bank of India, Apex Bank
     regulated by the Government of India) and also is the closest index
     available for cost of living and urban population. For instance, the cost
     index for the year 2004-2005 has been at 5%. With respect to the rates for
     charges stated in this Task Order, commencing on

<PAGE>

     the first anniversary of the Effective Date and on each anniversary
     thereafter during the term of the Task Order, such rates, applicable from
     time to time to the Task Order, will be increased, with effect from each
     anniversary, by percentage as released by RBI for the above referred index.

5.   Other Terms:

     PSBPS and Athena will separately do a time study, mutually agree and
     document the turnaround times, quality, auditing and other compliance
     requirements and obligations.

AGREED:

Vision Business Process Solutions,      Athenahealth, Inc.
Inc.

By: /s/ Vardhman Jain                   By: /s/ Ralph Catalano
    ---------------------------------       ------------------------------------
Name: Vardhman Jain                     Name: Ralph Catalano
Title: Managing Director                Title: Vice President, Claim Operations
Date: October 13th 2006                 Date: October 13, 2006

<PAGE>

                        TASK ORDER 6 TO SERVICE AGREEMENT

This Task Order (the "Task Order") is entered into on this September 4, 2006
under the Master Services Agreement dated December 9, 2002, read in conjunction
with Amendment No. 1 dated October 13, 2004, Amendment No. 2 dated March 8,
2005, and Amendment No. 3 dated April 12, 2006 (together, the "Agreement")
executed amongst Athenahealth, Inc., ("Athena"), Vision Business Process
Solutions Inc., (VBPS) and Perot Systems Business Process Solutions India
Private Limited (hereinafter called "PSBPS").

1.   Term:

     This Task Order shall be in effect for a period of thirty-six (36) months
     (the "Initial Term") from March 21st 2006 (the "Effective Date") subject to
     the Master Service Agreement dated December 9, 2002 being in force. Upon
     expiration of the Initial Term, this Task Order will automatically be
     renewed for consecutive additional terms of two (2) years each.
     Notwithstanding the foregoing, either party may terminate this Task Order
     with or without cause, effective at the end of the then current term
     (including the Initial Term) by providing the other party written notice of
     its intent to cancel at least sixty (60) days prior to the expiration of
     the then current term.

2.   Scope of Work:

     i) UNPOSTABLE RECORDS: Under the terms and conditions of this Task Order,
     VBPS shall provide the services of UNPOSTABLE RECORDS, whereby VBPS
     receives a work list from Athena that would contain the details of the
     Unpostables to be worked. This work list, along with the allotment will be
     placed in the local server for VBPS resources on a full time equivalent
     basis (the "Posters") to work. The posters would work the Unpostable
     allotted to them based on the priority (Chronological order of Unpostable
     created date). The work of the posters is to do the five/six point search
     in AthenaNet to see if they are able to identify the patient's record that
     would enable us to post a transaction and close the Unpostable. The
     different Unpostable records that would be worked by the Posters are EOB
     Received - Check Missing, Missing EOB/Missing Page, Missing Check,
     Correspondence Identified in Batch, RPO Research Required, Provider
     Takebacks, Missing Patient Statement, Duplicate Checks. The TAT is to work
     these Unpostable records, within five (5) business days from the date of
     creation of the Unpostable record.

     ii) DAILY VOLUME:

     VBPS will accommodate daily volume variations of Transactions 30% greater
     than projected average daily volume, subject to the availability of
     resources based on the requirement that Athena has informed VBPS to staff
     up for the said processes of Unpostables. For example, if the Client
     projects an average volume

<PAGE>
Confidential Materials omitted and filed separately with the Securities and
Exchange Commission.

Asterisks denote omissions.

     of 1000 Unpostables per day, VBPS will be able to process up to 1300
     Unpostables on any given day. Any volume of Unpostables in excess of 30%
     will not be subject to their respective turnaround time captured in Sec.
     2(i) and (ii) above. Also the abovementioned Turn around time in Sec. 2(i)
     and (ii) above shall not be applicable in cases where i) the Document is
     illegible or incomplete or ii) VBPS inability to access AthenaNet for
     reasons not attributable to VBPS.

3.   Price:

     i) Beginning from June 13, 2006 for the entire the term of this Task Order,
     the ramp-up pricing for VBPS new resources on a full time equivalent (FTE)
     basis (each such VBPS resources are herein referred to as "FTE") for
     Unpostable Records shall be charged at fifty percentages (50%) for the
     first twenty two (22) business days (the "Ramp-up Period") from their
     respective corresponding go- live date. During this period VBSP shall
     charge for the new FTE on Unpostable Records at the rate of US $* per hour
     per full - time equivalent (FTE) for Normal Time and US $* per hour per
     full - time equivalent (FTE) for Over Time. After the completion of the
     ramp-up period VBPS shall charge Athena for the Services of Unpostable
     Records as per the rate mentioned in C1.3(ii) of this Task Order."

     ii) From July 13, 2006 VBPS will charge Athena for the VBPS Services under
     this Task Order at the following rates: -

<TABLE>
<CAPTION>
                       NORMAL TIME    OVER TIME RATES
SERVICE              RATES PER HOUR       PER HOUR
-------              --------------   ---------------
<S>                  <C>              <C>
Unpostable Records        US $*           US $*
</TABLE>

     iii) VBPS will invoice Athena on a monthly basis. Athena shall make
     complete payment of the invoiced amounts to VBPS within thirty (30) days
     from the date of the invoice. Athena shall pay to VBPS the complete
     invoiced amounts without any deduction on account of non-payment by the
     clients of Athena. Late payments shall attract interest from the due date
     at the lesser of (i) one and a half percent per month, to accrue on a daily
     basis with monthly rests and to run from the due date until payment of such
     amount in full, or (ii) the maximum rate permitted by law.

4.   Cost of Living Adjustment.

     The cost of living adjustment index would be based on the information made
     available by Reserve Bank of India (RBI) for each year, in the website
     below.

     http://www.rbi.org.in/scripts/PublicationsView.aspx?id=7263#7

     We would be referring to the Harmonized Index of Consumer Prices (HICP) for
     Consumer Price Inflation (CPI) - Urban non Manual employees index shares by
<PAGE>

     RBI (Reserve Bank of India) in the above website link. This index is
     proposed since it is released by RBI (Reserve Bank of India, Apex Bank
     regulated by the Government of India) and also is the closest index
     available for cost of living and urban population. For instance, the cost
     index for the year 2004-2005 has been at 5%. With respect to the rates for
     charges stated in this Task Order, commencing on the first anniversary of
     the Effective Date and on each anniversary thereafter during the term of
     the Task Order, such rates, applicable from time to time to the Task Order,
     will be increased, with effect from each anniversary, by percentage as
     released by RBI for the above referred index.

5.   Other Terms:

     PSBPS and Athena will separately do a time study, mutually agree and
     document the quality, auditing and other compliance requirements and
     obligations.

AGREED:

Vision Business Process Solutions,      Athenahealth, Inc.
Inc.

By: /s/ Vardhman Jain                   By: /s/ Ralph Catalano
    ---------------------------------       ------------------------------------
Name: Vardhman Jain                     Name: RALPH J CATALANO
Title: Managing Director                Title: VICE PRESIDENT
Date: Sept 11th 2006                    Date: Sept 4 2006
<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

Interim Agreement for Outsource Claim Follow Up and Credit Balance Services for
Athenahealth

PART 1 - Claim Followup

Background: Athenahealth (Athena) seeks to outsource Claim Follow Up services
described below to Vision Healthsource, Inc. (Vision) for some of its clients.
These services will be performed under subcontract by VHS's Indian subsidiary.

Service Definition

Claims Follow Up: (This claim follow up process does not apply to follow up on
overpayments covered by Part II below). Vision will utilize the interactive
Athena system to provide follow-up services with respect to work lists of claims
provided to it periodically by Athena. As instructed by Athena in writing Vision
will document its work either by entries in such system or on separate problem
logs that will be uploaded to Athena separately.

The service will involve Vision accessing detailed claim information including
claim history - re-filing dates and previous calls, authorization numbers,
referral numbers etc. Athena will assign the accounts that they would like
Vision to follow up on. Vision will work on pending claims. Vision will:

     -    Research the account to determine need for a call and verify previous
          claim activity

     -    Follow-up with the appropriate payer

     -    Document the content and outcome of the call, which will include a
          detailed description of the call (Example, Insurance Paid - Vision
          will document the amount paid on claim, amount paid on check, check
          number, check date and the address to which the check was sent) and a
          relevant kick-code for automatic follow-through action on AthenaNet.

All of the above services will be performed in compliance with the steps,
measures, and instructions and requirements set forth in the Follow Up
Instructions contained in Attachment A. In the event of any contradiction, the
Follow-up Instructions will prevail. Athena may reasonably amend the Follow Up
Instructions in writing from time to time by sending the amended version or
additional language to a Vision manager, and Vision will be obligated to comply
with the Follow Up Instructions as amended, provided that if such amendment
requires material additional staffing, Vision will so inform Athena in writing
within 7 days and will be permitted a reasonable time to assemble the necessary
staff, except that Vision will be required to comply promptly with any amendment
that is designed to address any material deficiency in Vision services.

Pricing: Vision will bill Athena per on a transaction basis per claim. The price
for this Service is $*/claim.

Part II - Credit Balancing

Background. Athenahealth seeks to outsource credit-balancing services described
below to Vision. These services will be performed under subcontract by VHS's
Indian subsidiary.

<PAGE>

Service Definition

Vision will utilize the interactive Athena system to provide credit-balancing
services with respect to work lists of claims provided to it periodically by
Athena. As instructed by Athena in writing Vision will document its work either
by entries in such system or on separate problem logs that will be uploaded to
Athena separately. As part of the credit balancing services, claims may be
resolved either with or without follow up and the work required differs with
respect to each type. The service therefore has two components - Processing and
Follow Up.

Processing:

     -    Vision will analyze the claim to determine how the claim got into a
          credit balance or to be more specific as a result of whose payment
          (Insurance company) the claim went in to a credit balance.

     -    The reasons identified may be one or more of the following:

          1.   Duplicate payment by same Insurance

          2.   Duplicate posting by the payment poster

          3.   Wrong posting or posting error

          4.   Multiple Insurances paying as primary

          5.   Multiple Insurances paying as secondary

          6.   Interest payment

          7.   Lack of COB

          8.   Primary or secondary over paid as per their fee schedule

          9.   Other

     -    The analysis will be accomplished by opening the online EOB and
          understanding exactly how and who made the overpayment.

     -    The particular online EOB is a link to the entire batch, most of the
          time, and Vision will be required to search it by scrolling through
          the batch.

     -    Once the overpayment is identified then Vision will classify and take
          the appropriate decision or the action. Common actions addressing each
          of the first 8 reasons above in order include but are not limited to
          the following:

          1.   Send to AR with Instructions

          2.   Problem log entry for Athena to reverse the postings

          3.   Problem log entry for Athena to correct the postings

          4.   Send to AR with Instructions

          5.   Send to AR with Instructions

          6.   Post kick code and claim note in the software

          7.   Send to AR with Instructions

          8.   Send to AR with Instructions

     -    The AR Instructions will clearly state which Insurance should be
          called, for what amount and what information should be asked for in
          order to resolve the credit balance.

     -    Vision will clearly document AR Instructions, problem logs, kick code,
          and claim notes in the Athena system. If the batch link is for the
          whole batch then exact page

<PAGE>

Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

          numbers will be mentioned so that the AR agent does not search again
          and waste time.

Follow Up:

     -    The AR agent will view the claim in the Athena system as well as the
          associated EOB and will read all the Instructions and problem logs.

     -    The AR agent will confirm the overpayment to the Insurance company
          which includes the amount, check number etc. and also the refund
          address if that company does not have a take back facility.

     -    Once this is done, Vision will document the claim notes and the kick
          codes in the Athena system.

     -    On appropriate claims, the AR agent will call multiple Insurance
          companies to confirm with both Insurance companies (in case 2
          insurance are paying as primary/secondary) as to who was supposed to
          make the payment.

     -    If both Insurance Companies say they are the primary/secondary then
          the claim will be forwarded to the provider and instructions
          documented in the Athena system to the provider to get the information
          from the patient. This is done through the claim note.

     -    Exceptions are Insurance company not able to identify the over payment
          and needing time to audit, call back, etc. Some of these situations
          are appropriately documented in claim notes and some in the problem
          logs, as instructed by Athena.

     -    The kick code and claim note is entered in to the Athena system and
          the problem log is uploaded to Athena.

All of the above services will be performed in compliance with the steps,
measures, and instructions and requirements set forth in the Credit Balancing
Instructions contained in Attachment B. IN the event of any contradiction, the
Credit Balancing Instructions will prevail. Athena may reasonably amend the
Credit Balancing Instructions in writing from time to time by sending the
amended version or additional language to a Vision manager, and Vision will be
obligated to comply with the Credit Balancing Instructions as amended, provided
that if such amendment requires material additional staffing, Vision will so
inform Athena in writing within 7 days and will be permitted a reasonable time
to assemble the necessary staff, except that Vision will be required to comply
promptly with any amendment that is designed to address any material deficiency
in Vision services.

Pricing: VHS will bill Athena per on a per claim basis. The price for this
service is:

<TABLE>
<S>                              <C>
Claims not requiring Follow Up   $*/Claim
Claims requiring Follow Up       $*/Claim
</TABLE>

PROVISIONS RELATING TO BOTH PARTS I AND II

Acceptance and Effect. One signed by both parties, this interim agreement will
become part of the formal contract that is already in place between the parties
with respect to posting services as an amendment to that contract. The services
and payments under this interim agreement will be

<PAGE>

in addition to those currently in the contract, and this interim agreement will
have effect only as an amendment and not as a separate or independent agreement.
Such amendment is intended by the parties to be temporary, until a more detailed
and thorough amendment can be agreed. Promptly after accepting this interim
agreement, the parties will in good faith confer to establish such a detailed
and through amendment.

Staffing. Vision will ensure that a team of identified employees who are
adequately trained are solely dedicated to work on delivering Athena follow up
services sufficient to handle 2000 claims per day and that another such team is
dedicated to work on delivering Athena credit balancing services.

Quality. Vision will cooperate with Athena in reviewing accuracy of research and
documentation, clarity and politeness of calls, thoroughness of information
gathering, and rate of unnecessary calls of per claim handling. Vision will
remain responsible for the quality of its services; however, if Athena informs
Vision that it believes that any Vision employee is not providing services of
adequate quality, the Parties will review and discuss that performance and the
steps that Vision will take to improve that performance. Vision will take
effective steps to improve employee performance or reassign employees as
necessary to maintain a consistent and high quality level of employee competence
and performance.

Termination of Part I and part II Services. Termination of Part I and/or Part II
services under this section will not affect the parties' other rights and
obligations with respect to other work to be performed under the posting
contract currently in place between the parties. Either party may terminate this
Interim Agreement as it relates to Part I and/or Part II services for any reason
or for no reason upon 180 days written notice to the other. If Athena terminates
this Interim Agreement as it relates to Part I and/or Part II Services under
this paragraph, then following such notice of termination and until the
effective date of such termination the aggregate monthly fee paid by Athena to
Vision on account of the services being terminated will be subject to a minimum
payment amount calculated as follows: the aggregate fee for the services being
terminated in the month immediately following the month in which the notice of
termination was given will be no less than average of the monthly fees paid by
Athena for such services in each of the three months immediately preceding the
notice, and the minimum payment for such services in each succeeding month will
reduced from the original minimum figure by cumulative additional increments of
25% of that that original minimum figure until it is zero. By way of example and
not by way of limitation, if notice of termination as to Part I Services is
given by Athena at the end of March, the minimum fee paid by Athena for Part I
Services for April will the same as the average paid by Athena for Part Services
in the preceding December, January and February, the minimum fee paid by Athena
or Part I Services for May will be 75% of the April minimum figure, the minimum
fee paid by Athena or Part I Services for July will be 25% of the April minimum
figure, the minimum fee paid by Athena or Part I Services for July will be 25%
of the April minimum figure, and the minimum fee paid by Athena or Part I
Services for August and thereafter will be zero. Notwithstanding the foregoing,
if Athena terminates the Interim Agreement as to Part I and/or Part II Services
for cause or if Vision terminates the Interim Agreement as to either or both of
those Services, then there will be no minimum monthly fee during the notice
period.

<PAGE>

In addition, if Athena believes in good faith that the quality of Vision
services under Part I and/or Part II s substantially deficient or that the
manner in which Vision is conducting the work materially increases work that
Athena itself must do, it will review the matter in detail with Vision
management to determine the nature of any deficiency and the parties will
cooperate in good faith to establish a mutually agreement written plan of action
to remedy any such deficiency. If the deficiency persists despite the plan, then
Athena may terminate the services and payment under Part I and/or Part II as the
case may be on at least 30 days written notice.

Addition Terms. With respect to the services described in this interim
agreement, the following additional provisions will apply:

     -    Vision and its subsidiary will perform the services described in a
          timely, diligent, competent and professional manner and will exercise
          and be bound to exercise care, skill, experience and competence
          consistent with the high professional practice in the field;

     -    Neither Vision nor its subsidiary will access or use other than in
          compliance with the procedures and policies that Athena shall provide
          to Vision from time to time.

     -    Neither Vision nor its subsidiary will, directly or indirectly, export
          or transmit (i) any software, application, access to Athena systems or
          any related documentation or technical data or (ii) any product (or
          any part thereof), process, or service that is the direct product of
          any service under this interim agreement in or to the People's
          Republic of China, Afghanistan, Iraq or any group Q, S, W, Y or Z
          country specified in Supplement No. 1 of Section 770 of the United
          States Export Administration Regulations or to any other country to
          which such export or transmission is restricted by such regulation of
          statute, without the prior written consent, if required, of the Office
          of Export Administration of the United States Department of Commerce,
          or such other governmental entity as may have jurisdiction over such
          export or transmission. In addition, and without limitation of the
          foregoing, Contractor shall not, directly or indirectly, export or
          transmit any of the foregoing, to any country other than as between
          Vision and it subsidiary in India; and

     -    Neither Vision nor its subsidiary will access or use any Athena
          system, application or functionality unless and to extent requested by
          Athena in writing for purposes of performing Vision's obligations
          under this interim agreement. No access to or use of Athena systems,
          applications or functionality is transferable by Vision or its
          subsidiary.

     -    In accessing or using Athena systems, applications or functionality,
          neither Vision nor its subsidiary (i) make such access or use in
          connection with provision of any services to any third party; (ii)
          make such access or use other than through and by their own employees
          who are registered with Athena individually as authorized users
          thereof, (iii) make such access or use other than by electronically
          secure means and methods approved I advance in writing by Athena and
          only by the use of unique and confidential passwords applied to each
          individual user; (iv) resell, lease, encumber, sublicense, distribute,
          publish, transmit, provide such access or use to any third party in
          any medium whatsoever; (v) make such access or use on any public
          system or multiple computer or user arrangement or network accessible
          by anyone except Athena, Vision and its subsidiary; (vi) derive
          specifications from, reverse engineer,

<PAGE>

          reverse compile, disassemble, or create derivative works based on
          Athena systems, applications; (vii) copy data or screens except on an
          occasional basis as necessary to accomplish its work or, (viii) input
          or post through or to Athena any content that is illegal, threatening,
          harmful, lewd, offensive or defamatory or that infringes the
          intellectual property rights, privacy rights or rights of publicity of
          others or that contains any virus, worm, Trojan Horse or other
          mechanism to damage or impair the operation of Athena systems,
          software or hardware or the systems, software or hardware of others or
          to grant unauthorized access to any date or system.

     -    Neither Vision nor its subsidiary will make or operate any copy of any
          elements of Athena systems, applications or functionality except as
          explicitly authorized by Athena in writing. If and to the extent that
          Vision or its subsidiary makes or operates any copy of Athena systems,
          applications or functionality, such copy will belong exclusively to
          Athena and will be located only upon a server to which Athens is the
          sole owner of the root password; and, neither Vision nor its
          subsidiary will restrict electronic or physical access of Athena to
          such server.

     -    In accessing or using Athena systems, Vision will not order, review,
          access or use any data in excess of that reasonably necessary for it
          to perform the work it is obligated to do under this interim
          agreement.

athenahealth, Inc.                      Vision Healthsource, Inc.

By: /s/ Anil G. Sitole                  By: /s/ Vardhman Jain
    ---------------------------------       ------------------------------------
Name: Anil G. Sitole                    Name: Vardhman Jain
Title: President                        Title: President<PAGE>
Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

                                                                   EXHIBIT 10.12

                           EXODUS COMMUNICATION, INC.

                            MASTER SERVICES AGREEMENT

MASTER SERVICES AGREEMENT (the "Agreement") between Exodus Communications, Inc.,
("Exodus") and ATHENA HEALTHCARE ("Customer") is made effective as of the
date indicated below the Customer signature on the initial Order From submitted
by Customer and accepted by Exodus.

1. OVERVIEW.

     1.1 General. This Agreement states the terms and conditions by which Exodus
will deliver and Customer will receive any or all of the services provided by
Exodus, including facilities, bandwidth, managed services and professional
services. If Customer purchases any equipment from Exodus (as indicated in the
Order Form(s) described below), the terms and conditions by which Customer
purchasers and Exodus sells such equipment are stated in Addendum A attached
hereto. Only this Section 1.1 and Addendum A shall apply to the purchase and
sale of equipment. The specific services and/or products to be provided
hereunder are identified in the Order Form(s) submitted by Customer and accepted
by Exodus and described in detail in the Specification Sheet(s) and Statements
of Work attached to each Order Form. Each Order Form (with the attached
Specification Sheet(s) and Statement(s) of Work) submitted accepted and executed
by both parties is hereby incorporated by reference into this Agreement. This
Agreement is intended to serve any and all Services ordered by Customer and
provided by Exodus. In the event that any terms set forth herein apply
specifically to a service not ordered by Customer, such terms shall only apply
to Customer

     1.2 Definitions

          (a) "Customer Areas" means that portion(s) of the Internet Data
     Censor(s) made available to Customer for the placement of Customer
     Equipment and/or Exodus Supplied Equipment and use of the Service(s).

          (b) "Customer Equipment" means the Customer's computer hardware, not
     including stored data, and other tangible equipment placed by Customer in
     the Customer Area. The Customer Equipment shall be identified on Exodus
     standard customer equipment list completed and delivered by Customer to
     Exodus, and amended in writing from time to time by Customer.

          (c) "Customer Registration Form" means the list that contained the
     names and contains information (e.g., pager, email and telephone numbers)
     of Customer and the individuals authorized by Customer to enter the
     Internet Data Center(s) and Customer Area, as delivered by Customer to
     Exodus and amended in writing from time to time by Customer.

          (d) "Customer Technology" means Customer's proprietary technology,
     including Customer's Internet operations design, content, software

<PAGE>

     tools, hardware designs, algorithms, software (in source and object
     forms), user interface designs, architecture, class libraries, objects
     and documentation (both printed and electronic), know-how, trade secrets
     and any related intellectual property rights throughout the world (whether
     owned by Customer or licensed to Customer from a third party) and also
     including any derivatives, improvements, enhancements or extensions of
     Customer Technology conceived, reduced to practice, or developed during the
     term of this Agreement by Customer.

          (e) "Exodus Supplied Equipment" means the computer hardware, software
     and other tangible equipment and intangible computer code contained therein
     to be provided by Exodus for use by Customer as set forth on the Order
     Form(s).

          (f) "Exodus Technology" means Exodus proprietary technology, including
     Exodus Services, software tools, hardware designs, algorithms, software (in
     source and object forms), user interface designs, architecture, class
     libraries, objects and documentation (both printed and electronic), network
     designs, know-how, trade secrets and any related intellectual property
     rights throughout the world (whether owned by Exodus or licensed to Exodus
     from a third party) and also including any derivatives, improvements,
     enhancements or extensions of Exodus Technology conceived, reduced to
     practice or developed during the term of this Agreement by either party
     that are not uniquely applicable to Customer or that have general
     applicability in the art.

          (g) "Initial Term" means the minimum term for which Exodus will
     provide the Service(s) to Customer, as indicated on the Order Form(s).
     Except as otherwise expressly provided in this Agreement, Exodus is
     obligated to provide and Customer is obligated to pay for each Service
     through its Initial Term and any Renewal Term.

          (h) "Internet Data Center(s)" mean any of the facilities used by
     Exodus to provide the Service(s).

          (i) "Professional Services" mean any non-standard professional or
     consulting service provided by Exodus to Customer as more fully described
     in a Statement of Work.

          (j) "Renewal Term" means any service term following the Initial Term,
     as specified in Section 2.2.

          (k) "Representatives" mean the individuals identified in writing on
     this Customer Registration Form and authorized by Customer to enter the
     Internet Data Center(s) and the Customer Area.

          (l) Rules and Regulations" mean the Exodus general rules and
     regulations governing Customer's use of Services, including, but not
     limited to, online conducts, and obligations of Customer and its
     Representatives in this Internet Data Center.

                                        2

<PAGE>

          (m) "Service(s)" mean the specific service(s) provided by Exodus as
     described on the Order Form(s).

          (n) "Service Commencement Date" means the date Exodus will begin
     providing the Service(s) to Customer, as indicated in a Notice of Service
     Commencement delivered by Exodus to Customer.

          (o) "Service Level Warranty" is described and defined in Section 5.2
     below.

          (p) "Specification Sheet" means the detailed description(s) of the
     Professional Services is attached to an Order Form(s).

          (q) "Statement of Work" means the detailed description(s) of the
     Professional Services attached to an Order Form(s).

          (r) "Work" means any tangible deliverable provided by Exodus to
     Customer as described in the Statement of Work for any Professional
     Service.

2. DELIVERY OF SERVICES: TERM FEES.

     2.1 Delivery of Service

          (a) General. By submitting an Order Form, Customer agrees to take and
     pay for, and, by accepting the Order Form, Exodus agrees to provide the
     Service(s) during the Initial Term and for any Renewal Term, as specified
     in paragraph 2.2(b) below.

          (b) Delivery of Supplemental Services. The purpose of this provision
     is to enable Exodus to provide Customer with certain limited services and
     equipment needed by Customer on a "one-of" or emergency basis
     ("Supplemental Services") where such services are not included within the
     scope of the Services as described in the Specification Sheets and/or
     Statement of Work. Supplemental Service may include, as an example, a
     request from Customer to Exodus via telephone that Exodus immediately
     replace a problem Customer server with an Exodus server for a temporary
     period of time. Exodus shall notify Customer of the Fees for any
     Supplemental Services requested by Customer and obtain Customers' approval
     prior to providing such services. In the event Exodus reasonably determines
     that Supplemental Services are required on an emergency basis. Exodus may
     provide such services without the consent of Customer, thereafter provide
     notice of the services to Customer and bill Customer a reasonable fee for
     such services. Customer agrees to pay Exodus the fees charged by Exodus for
     Supplemental Services. Customer will be charged for Supplemental Services
     in the invoices issued the month following delivery of the services. Exodus
     will use commercially reasonable efforts to provide

                                        3

<PAGE>
          Confidential Material omitted and filed separately with the
        Securities and Exchange Commission. Asterisks denote omissions.

     Supplemental Services, provided that Exodus has no obligation to determine
     the need for or provide Supplemental Services. All Supplemental Services
     provided pursuant to this paragraph 2.1(b) are provided on an "as is" basis
     and exclude warranties of any kind, whether express or implied.

     2.2 Term.

          (a) Term Commencement. The term for cash Service will commence on the
     Service Commencement Date indicated in the Notice of Service Commencement
     delivered by Exodus to Customer when Exodus begins providing such Service
     to Customer.

          (b) Renewal Term(s). Each Service will continue automatically for
     additional terms equal to the Initial Term ("Renewal Term") unless Customer
     notifies Exodus in writing at least thirty (30) days prior to the end of
     the Initial Term or a Renewal Term, as applicable, that it has elected to
     terminate such Service, in which case such Service shall terminate at the
     end of such term. The termination of any Service will not affect Customer's
     obligations to pay for other Service(s). Notwithstanding the foregoing,
     Exodus may change or increase the prices it charges Customer for any
     Service at any time after the Initial Term effective thirty (30) days after
     providing notice to Customer. This paragraph 2.2(b) does not apply to
     Exodus Supplied Equipment which is only provided for the Initial Term.

3. FEES AND PAYMENT TERMS.

     3.1 Fees and Expenses. Customer will pay all fees due according to the
prices and terms listed in the Order Form(s). The prices listed in the Order
Form(s) will remain in effect during the Initial Term indicated in the Order
Form(s) and will continue thereafter, unless modified in accordance with Section
2.2. Customer also agrees to reimburse Exodus for actual out-of-pocket
reasonable expenses incurred in providing Professional Services to Customer.

     3.2 Payment Terms. On the Service Commencement Date for each Service,
Customer will be billed an amount equal in all non-incurring charges indicated
in the Order Form and the monthly recurring charges for the first month of
the term. Monthly recurring charges for all other months will be billed in
advance of the provision of Services. All other charges for Services received
and expenses incurred for Professional Services during a month (e.g., bandwidth
usage fees, travel expenses) will be billed at the end of the month in which the
Services were provided. Payment for all fees is due upon receipt of each Exodus
invoice. All payments will be made in the United States in U.S. dollars.

     3.3 Late Payments. Any payment not received within thirty (30) days of the
invoice date will accrue interest at a rate of * percent (*%) per month, or the
highest rate allowed by applicable law, whichever is lower. If Customer is
delinquent in its payments, Exodus may, upon written notice to Customer, modify
the

                                        4

<PAGE>

payment terms to require full payment before the provision of all Services and
Exodus Supplied Equipment or require other assurances to secure Customer's
payment obligations hereunder.

     3.4 Taxes. All fees charged by Exodus for Services are exclusive of all
taxes and similar fees now in force or enacted in the future imposed on the
transaction and/or the delivery of Services, all of which Customer will be
responsible for and will pay in full, except for taxes based on Exodus' net
income.

4. CONFIDENTIAL INFORMATION; INTELLECTUAL PROPERTY OWNERSHIP; LICENSE GRANTS.

     4.1 Confidential Information.

          (a) Nondisclosure of Confidential Information. Each party acknowledges
     that it will have access to certain confidential information of the other
     party concerning the other party's business, plans, customers, technology,
     and products, and other information held in confidence by the other party
     ("Confidential Information"). Confidential Information will include all
     information in tangible or intangible form that is marked or designated as
     confidential or that, under the circumstances of its disclosure, should be
     considered confidential. Confidential Information will also include, but
     not be limited to, Exodus Technology, Customer Technology, and the terms
     and conditions of this Agreement. Each party agrees that it will not use in
     any way, for its own account or the account of any third party, except as
     expressly permitted by, or required to achieve the purposes of this
     Agreement, nor disclose to any third party (except as required by law or to
     that party's attorneys, accountants and other advisors as reasonably
     necessary), any of the other party's Confidential Information and will take
     reasonable precautions to protect the confidentiality of such information,
     at least as stringent as it takes to protect its own Confidential
     Information.

          (b) Exceptions. Information will not be deemed Confidential
     Information hereunder if such information: (i) is known to the receiving
     party prior to receipt from the disclosing party directly or indirectly
     from a source other than one having an obligation of confidentiality to the
     disclosing party, (ii) becomes known (independently of disclosure by the
     disclosing party) to the receiving party directly or indirectly from a
     source other than one having an obligation of confidentiality to the
     disclosing party, (iii) becomes publicly known or otherwise ceases to be
     secret or confidential, except through a breach of this Agreement by the
     receiving party or (iv) is independently developed by the receiving party.
     The receiving party may disclose Confidential Information pursuant to the
     requirements of a governmental agency or by operation of law, provided that
     it gives the disclosing party reasonable prior written notice sufficient to
     permit the disclosing party to contest such disclosure.

                                        5

<PAGE>

     4.2 Intellectual Property.

          (a) Ownership. Except for the rights expressly granted herein and the
     assignment expressly made in paragraph 4.4(a), this Agreement does not
     transfer from Exodus to Customer any Exodus Technology, and all right,
     title and interest in and to Exodus Technology will remain solely with
     Exodus. Except for the rights expressly granted herein, this Agreement does
     not transfer from customer to Exodus any Customer Technology, and all
     right, title and interest in and to Customer Technology will remain solely
     with Customer. Exodus and Customer each agree that it will not, directly or
     indirectly, reverse engineer, decompile, disassemble or otherwise attempt
     to derive sources code or other trade secrets from the other party.

          (b) General Skills and Knowledge. Notwithstanding anything to the
     contrary in this Agreement, Exodus will not be prohibited or enjoined at
     any time by Customer from utilizing any skills or knowledge of a general
     nature acquired during the course of providing the Services, including,
     without limitation, information publicly known or available or that could
     reasonably be acquired in similar work performed for another customer of
     Exodus.

     4.3 License Grants.

          (a) By Exodus. Exodus hereby grants to Client a nonexclusive,
     royally-free license, during the term of this Agreement; to use the Exodus
     Technology solely for purposes of using the Service(s). Customer shall have
     no right to use the Exodus Technology for any purpose other than using the
     Service(s).

          (b) By Customer. Customer agrees that if, in the course of performing
     the Service(s), it is necessary for Exodus to access Customer Equipment
     and use Customer Technology, Exodus is hereby granted and shall have a
     nonexclusive, royalty-free license, during the term of this Agreement, to
     use the Customer Technology solely for the purposes of delivering the
     Service(s) to Customer. Exodus shall have no right to use the Customer
     Technology for any purpose other than providing the Service(s).

     4.4 Professional Services; Assignments and License.

          (a) Assignment of Work. Effective at the time Exodus receives full and
     final payment for the Professional Service, Exodus assigns to Customer all
     right, title and interest, including all intellectual property rights, in
     the Work, provided, however, that such assignment does not include the
     Exodus Technology.

          (b) License Grant. Commencing at the time Exodus receives full and
     final payment for the Work. Exodus grants to Customer a non-exclusive,
     non-transferable, royalty free, perpetual license to use the Exodus
     Technology incorporated into the Work solely in connection with the use of
     the Work as a

                                        6

<PAGE>

     whole. To the extent that Customer or its employees or contractors
     participate in the creation or development of Exodus Technology. Customer
     on behalf of itself and its employees and contractors, hereby assigns to
     Exodus all right, title and Interest, including all intellectual property
     rights in the Exodus Technology.

5. EXODUS REPRESENTATIONS AND WARRANTIES.

     5.1 General.

          (a) Authority and Performance of Exodus. Exodus represents and
     warrants that (i) it has the legal right to enter into this Agreement and
     perform its obligations hereunder, and (ii) the performance of its
     obligations and delivery of the Services to Customer will not violate any
     applicable U.S. laws or regulations, including OSHA requirements, or cause
     a breach of any agreements with any third parties. In the event of a breach
     of the warranties set forth in this paragraph 5.1(a), Customer's sole
     remedy is termination pursuant to Section 10 of the Agreement.

          (b) Year 2000 Performance Compliance. Exodus warrants that none of the
     computer hardware and software systems and equipment incorporated into or
     utilized in the delivery of the Services contains any date dependent
     routines or logic which will fail to operate correctly after December 31,
     1999 by reason of such date dependence; provided, however, that no
     representation or warranty is made as to the adequacy of any Customer or
     third party service provided hardware or software used in connection with
     the Services. In the event of any breach of the warranties under this
     paragraph 5.1(b), Customer's sole remedy is termination pursuant to Section
     10 of the Agreement.

     5.2 Service Level Warranty. In the event that customer experiences any of
the service performance issues defined in this Section 5.2 as a result of
Exodus' failure to provide bandwidth or facility services. Exodus will, upon
Customer's request in accordance with paragraph 5.2(d) below, credit Customer's
account as described below (the "Service Level Warranty"). The Service Level
Warranty shall not apply to any services other than bandwidth and facility
services, and, shall not apply to performance issues (i) caused by factors
outside of Exodus' reasonable control; (ii) that resulted from any actions or
inactions of Customer or any third parties; or (iii) that resulted from
Customer's equipment and/or third party equipment (one within the sole control
of Exodus).

          (a) Service Warranty Definitions. For purposes of this Agreement, the
     following definitions shall apply only to the Services (not including
     Professional Services).

               (i)  "Downtime" shall mean sustained packet less in excess of
                    fifty percent (50%) within Exodus' U.S. network for fifteen
                    (15) consecutive minutes due to the failure of Exodus to
                    provide Service(s) for such period. Downtime shall not

                                        7

<PAGE>

                    include any packet loss or network unavailability during
                    Exodus's scheduled maintenance of the Internet Data Centers,
                    network and Service(s), as described in the Rules and
                    Regulations.

               (ii) "Excess Latency" shall mean transmission latency in excess
                    of one hundred twenty (120) Milliseconds round trip time
                    between any two points within Exodus's U.S. network.

               (iii) "Excess Packet Loss" shall mean packet loss in excess of
                    one percent (1%) between any two points within Exodus' U.S.
                    network.

               (iv) "Performance Problem" shall mean Excess Packet Loss and/or
                    Excess Latency.

               (v)  "Service Credit" shall mean an amount equal to the pro-rata
                    monthly recurring connectivity charges (i.e., all monthly
                    recurring bandwidth-related charges) for one (1) day of
                    Service.

          (b) Downtime Periods. In the event Customer experiences Downtime,
     Customer shall be eligible to receive from Exodus a Service Credit for each
     Downtime period. Examples: If Customer experiences one Downtime period, it
     shall be eligible to receive one Service Credit. If Customer experiences
     two Downtime periods, either from a single event or multiple events, it
     shall be eligible to receive two Service Credits.

          (c) Performance Problem; Packet Loss and Latency. In the event that
     Exodus discovers or is notified by Customer that Customer is experiencing a
     Performance Problem, Exodus will take all notions necessary to determine
     the source of the Performance Problem.

               (i)  Time to Discover Source of Performance Problems Notification
                    of Customer. Within two (2) hours of discovering or
                    receiving notice of the Performance Problem, Exodus will
                    determine whether the source of the Performance Problem is
                    limited to the Customer Equipment and the Exodus equipment
                    concerning the Customer Equipment in the Exodus LAN. If
                    Exodus determines that the Customer Equipment and Exodus
                    connection are not the source of the Performance Problem,
                    Exodus will determine the source of the Performance Problem
                    within an additional two (2) hour period. In any event,
                    Exodus will notify Customer of the source of the

                                        8

<PAGE>

                    Performance Problem within sixty (60) minutes of identifying
                    the source.

               (ii) Remedy of Packet Loss and Latency. If the source of the
                    Performance Problem is within the sole control of Exodus,
                    Exodus will remedy the Performance Problem within two (2)
                    hours of determining the source of the Performance Problem.
                    If the source of and remedy to the Performance Problem
                    reside outside of the Exodus LAN or WAN, Exodus will use
                    commercially reasonably efforts to notify the party(ies)
                    responsible for the source of the Performance Problem and
                    cooperate with it (them) to resolve such problem as soon as
                    possible.

               (iii) Failure to Determine Sources and/or Remedy. In the event
                    that Exodus (A) is unable to determine the source of the
                    Performance Problem within the time periods described in
                    subsection (i) and/or (B) Exodus is the sole source of the
                    Performance Problem and is unable to remedy such Performance
                    Problem within the time period described in subsection (ii)
                    above, Exodus will deliver a Service Credit to Customer for
                    such two (2) hour period in excess of the time periods for
                    identification and resolution described above.

          (d) Customer Must Request Service Credit. In order to receive any of
     the Service Credits described in this Section 5.2, Customer must notify
     Exodus within seven (7) days from the time Customer becomes eligible to
     receive a Service Credit. Failure to comply with the requirement will
     forfeit Customer's right to receive a Service Credit.

          (e) Remedies Shall Not Be Cumulative; Maximum Service Credit. The
     aggregate maximum number of Service Credits to be issued by Exodus to
     Customer for any and all Downtime periods and Performance Problems that
     occur in a single calendar month shall not exceed seven (7) Service
     Credits. A Service Credit shall be issued in the Exodus invoice in the
     month following the Downtime or Performance Problem, unless the Service
     Credit is due in Customer's final month of Service, in such case, a refund
     for the dollar value of the Service Credit will be mailed to Customer.
     Customer shall also be eligible to receive a pro-rata refund for (i)
     Downtime periods and Performance Problems for which Customer does not
     receive a Service Credit and (ii) any Services Exodus does not deliver to
     Customer for which Customer has paid.

          (f) Termination Option for Chronic Problems Customer may terminate
     this Agreement for cause and without penalty by notifying Exodus within
     five (5) days following the end of a calendar month in the event either of
     the following occurs: (i) Customer experiences more than fifteen (15)
     Downtime

                                        9

<PAGE>

     periods resulting from three (3) or more nonconsecutive Downtime events
     during the calendar month; or (ii) Customer experiences more than eight (8)
     consecutive hours of Downtime due to any single event. Such termination
     will be effective thirty (30) days after receipt of such notice by Exodus.

          (g) THE SERVICE LEVEL. WARRANTY SET FORTH IN THIS SECTION 5.2 SHALL
     ONLY APPLY TO THE BANDWIDTH AND FACILITY SERVICE(S) PROVIDED BY EXODUS AND
     DOES NOT APPLY TO (I) ANY PROFESSIONAL SERVICES; (II) ANY SUPPLEMENTAL
     SERVICES; AND (III) ANY SERVICE(S) THAT EXPRESSLY EXCLUDE THIS SERVICE
     LEVEL WARRANTY (AS STATED IN THE SPECIFICATION SHEETS FOR SUCH SERVICES).
     THIS SECTION 5.2 STATES CUSTOMER'S SOLE AND EXCLUSIVE REMEDY FOR ANY
     FAILURE OF EXODUS TO PROVIDE SERVICE(S).

     5.3 Service Performance Warranty. Exodus warrants that it will perform the
Services in a manner consistent with industry standards reasonably applicable to
the performance thereof.

     5.4 Selection of Exodus Supplied Equipment; Manufacturer Warranty. Customer
acknowledges that it has selected the Exodus Supplied Equipment and disclaims
any statements made by Exodus. Except with respect, to any express warranties
for Service(s) related to Exodus Supplied Equipment Customer acknowledges and
agrees that its use and possession of the Exodus Supplied Equipment by Customer
shall be subject to and controlled by the terms of any manufacturer's or, if
appropriate, supplier's warrant, and Customer agrees to look solely to the
manufacturer or, if appropriate, supplier with respect to all mechanical,
service and other claims, and the right to enforce all warranties made by said
manufacturer are hereby, to the extent Exodus has the right, assigned to
Customer solely for the initial Term.

     5.5 No Other Warranty. EXCEPT FOR THE EXPRESS WARRANTIES SET FORTH IN THIS
SECTION 5, THE SERVICES ARE PROVIDED ON AN "AS IS" BASIS, AND CUSTOMER'S USE OF
THE SERVICES IS AT ITS OWN RISK. EXODUS DOES NOT MAKE AND EXPRESSLY DISCLAIMS,
ANY AND ALL OTHER EXPRESS AND/OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
NON-INFRINGEMENT AND TITLE AND ANY WARRANTIES ARISING FROM A COURSE OF DEALING
USAGE, OR TRADEPLACE, USE DOES NOT WARRANT THAT THE SERVICES WILL BE
UNINTERRUPTED, ERROR-FREE OR COMMERCIALLY SECURE.

     5.6 Disclaimer of Actions Caused by and/or Under the Control of Third
Parties. EXODUS DOES NOT AND CANNOT CONTROL THE FLOW OF DATA TO OR FROM EXODUS'S
NETWORK AND OTHER PORTIONS OF THE INTERNET. SUCH FLOW DEPENDS IN LARGE PART ON
THE PERFORMANCE OF INTERNET SERVICES PROVIDED OR CONTROLLED BY THIRD PARTIES. AT
TIMES, ACTIONS OR INACTIONS OF SUCH THIRD

                                       10

<PAGE>

PARTIES CAN IMPAIR OR DISRUPT CUSTOMER'S CONNECTIONS TO THE INTERNET (OR
PORTIONS THEREOF). ALTHOUGH EXODUS WILL USE COMMERCIALLY REASONABLE EFFORTS TO
TAKE ALL ACTIONS IT DEEMS APPROPRIATELY TO REMEDY AND AVOID SUCH EVENTS, EXODUS
CANNOT GUARANTEE THAT SUCH EVENTS WILL NOT OCCUR. ACCORDINGLY, EXODUS DISCLAIMS
ANY AND ALL LIABILITY RESULTING FROM OR RELATED TO SUCH EVENTS.

6. CUSTOMER.

     6.1 Warranties of Customer.

          (a) General. Customer represents and warrants that (i) it has the
     legal right and authority, and will continue to own or maintain the legal
     right and authority, during the term of this Agreement, in place and use
     any Customer Equipment as contemplated under this Agreement; (ii) the
     performance of its obligations and use of the Services (by Customer, its
     customers and users) will not violate any applicable laws, regulations or
     the Rules and Regulations or cause a breach of any agreements with any
     third parties or unreasonably interfere with other Exodus customers' use of
     Exodus services, and (iii) all equipment, materials and other tangible
     items placed by Customer at Internet Data Centers will be used in
     compliance with all applicable manufacturer specifications.

          (b) Breach of Warranties. In the event of any breach of any of the
     foregoing warranties, in addition to any other remedies available at law or
     in equity, Exodus will have the right, in its sole reasonable discretion,
     to suspend immediately any related Services if deemed reasonably necessary
     by Exodus to prevent any harm to Exodus and its business. Exodus will
     provide notice and opportunity to cure if practicable depending on the
     nature of the breach. Once cured, Exodus will promptly restore the
     Service(s).

     6.2 Compliance with Law and Rules and Regulations. Customer agrees that it
will use the Service(s) only for lawful purposes and in accordance with this
Agreement. Customer will comply at all times with the applicable laws and
regulations and the Rules and Regulations as updated by Exodus from time to
time. The Rules and Regulations are incorporated herein and made a part hereof
by this reference. Exodus may change the Rules and Regulations upon fifteen (15)
days' notice to Customer, which notice may be provided by posting such new
Rules and Regulations as the Exodus Web site www.exodus.net. Customer agrees
that it has received, read and understands the current version of the Rules and
Regulations. The Rules and Regulations contain restrictions on Customer's and
Customer's users' online conduct (including prohibitions against unsolicited
commercial email) and contain financial penalties for violations of such
restrictions. Customer agrees to comply with such restrictions and, in the event
of a failure to comply, customer agrees to pay the financial penalties in
accordance with the Rules and Regulations. Customer acknowledges that Exodus
exercises no control whatsoever over the content of the information passing
through Customer's site(s) and that it is the sole responsibility of Customer to
ensure that the information is and its users

                                       11

<PAGE>

transmit and receive complies with all applicable laws and regulations and the
Rules and Regulations.

     6.3 Access and Security. Except with the advanced written consent of
Exodus, Customer's access to the Internet Data Centers will be limited solely to
the Representatives. Representatives may only access the Customer Area and are
prohibited from accessing other areas of the Internet Data Center(s) unless
accompanied by an authorized Exodus representative.

     6.4 Restrictions on Use of Services. Customer shall not, without the prior
written consent of Exodus (which may be withheld in its sole discretion), resell
the Services to any third parties or connect Customer Equipment directly to
anything other than the Exodus network, equipment and facilities.

     6.5 Relocation of Customer Equipment. In the event that it becomes
necessary to relocate the Customer Equipment to another customer Area or
Internet Data Center operated by Exodus, Customer will cooperate in good faith
with Exodus to facilitate such relocation provided that such relocation is based
on reasonable business needs of Exodus (including the needs of other Exodus
customers), the expansion of the space requirements of Customer or otherwise.
Exodus shall be solely responsible for any costs and expenses incurred by Exodus
in connection with any such relocation and will use commercially reasonable
efforts in cooperation with Customer to minimize and avoid any interruption to
the Services.

     6.6 Exodus Supplied Equipment.

          (a) Delivery and Terms. On or prior to the Service Commencement Date,
     Exodus shall deliver to Customer, at the designated Customer Area, the
     Exodus Supplied Equipment. Customer shall have the right to use the Exodus
     Supplied Equipment for the Initial Term set forth in the Order Form and any
     additional period agreed to in writing by Exodus. Customer shall not remove
     any Exodus Supplied Equipment from the Customer Area(s) without the prior
     written consent of Exodus.

          (b) Title. The Exodus Supplied Equipment shall always remain the
     personal property of Exodus. Customer shall have no right or interest in or
     to the Exodus Supplied Equipment except as provided in this Agreement and
     the applicable Order Form and shall hold the Exodus Supplied Equipment
     subject and subordinate to the rights of Exodus. Customer agrees to execute
     UCC financing statements by and when requested by Exodus and hereby
     appoints Exodus as its attorney-in-fact to execute such financing
     statements on behalf of Customer. Customer will, at its own expense, keep
     the Exodus Supplied Equipment free and clear from any liens or encumbrances
     of any kind (except any caused by Exodus) and will indemnify and hold
     Exodus harmless from and against any loss or expense caused by Customer's
     failure to do so. Customer shall give Exodus immediate written notice of
     any attachment or judicial process affecting the Exodus Supplied Equipment
     or Exodus's ownership. Customer will not remove,

                                       12

<PAGE>

     alter or destroy any labels on the Exodus Supplied Equipment stating that
     it is the property of Exodus and shall allow the inspection of the Exodus
     Supplied Equipment at any time.

          (c) Use, Maintenance and Repair. Customer will, at its own expense,
     keep the Exodus Supplied Equipment in good repair, appearance and
     condition, other than normal wear and tear, and, if not instructed in the
     Services, shall obtain, pay for and keep in effect through the Initial Term
     a hardware and software maintenance agreement with the manufacturer or
     other party acceptable to Exodus. All parts furnished in connection with
     such repair and maintenance shall be manufacturer authorized parts and
     shall immediately become components of the Exodus Supplied Equipment and
     all property of Exodus. Customer shall use the Exodus Supplied Equipment in
     compliance with the manufacturer's or supplier's suggested guidelines.

          (d) Upgrades and Additions. Customer may affix or install any
     necessary, addition, upgrade, equipment or device on in the Exodus Supplied
     Equipment (other than electronic data) ("Additions") provided that such
     Additions (i) can be removed without cause material damage to the Exodus
     Supplied Equipment; (ii) do not reduce the value of the Exodus Supplied
     Equipment and (iii) are obtained from or approved in writing by Exodus and
     are not subject to the interest of any third party other than Exodus. Any
     other Additions may not be installed without Exodus' prior written consent.
     At the end of the Initial Term, Customer shall remove any Additions which
     (i) were not provided by Exodus and (ii) are readily removable without
     causing material damage or impairment of the intended function, use, or
     value of the Exodus Supplied Equipment, and restore the Exodus Supplied
     Equipment to its original configuration. Any Additions, which are not so
     removable, will become the property of Exodus (lien free).

7. INSURANCE.

     7.1 Exodus Minimum Levels. Exodus agrees to keep in full force and effect
during the term of this Agreement: (i) comprehensive general liability insurance
in an amount not less than $2 million per occurrence for bodily injury and
property damage and (ii) workers' compensation insurance in an amount not less
than that required by applicable law. Exodus agrees that it will ensure and be
solely responsible for ensuring that its contractors and subcontractors maintain
insurance coverage at levels no less than those required by applicable law and
customary in Exodus's and its agents' industries.

     7.2 Customer Minimum Levels. In order to provide customers with physical
access to facilities operated by Exodus and equipment owned by third parties,
Exodus is required by its insurers to ensure that each Exodus customer maintains
adequate insurance coverage. Customer agrees to keep in full force and effect
during the term of this Agreement: (i) comprehensive general liability insurance
in an amount not less than $2 million per occurrence for bodily injury and
property damage and (ii) workers compensation insurance in an amount not less
than that required by applicable law.

                                       13

<PAGE>

Customer agrees that it will ensure and be solely responsible for ensuring that
its agents (including contractors and subcontractors) maintain insurance
coverage at levels no less than those required by applicable law and customary
in Customer's and its agents' industries.

     7.3 Certificates of Insurance; Naming Exodus as an Additional Insured.
Prior to installation of any Customer Equipment in the Customer Area, Customer
will (i) deliver in Exodus certificates of insurance which evidence the minimum
levels of insurance set forth above; and (ii) cause its insurance provider(s) to
name Exodus as an additional insurer and notify Exodus in writing of the
effective date thereof.

8. LIMITATIONS OF LIABILITY.

     8.1 Personal Injury. EACH REPRESENTATIVE AND ANY OTHER PERSON VISITING AN
INTERNET DATA CENTER DOES SO AT ITS OWN RISK. EXODUS ASSUMES NO LIABILITY
WHATSOEVER FOR ANY HARM TO SUCH PERSONS RESULTING FROM ANY CAUSE OTHER THAN THE
NEGLIGENCE OR WILLFUL MISCONDUCT OF EXODUS.

     8.2 Damage to Customer Equipment. EXODUS ASSUMES NO LIABILITY FOR ANY
DAMAGE TO, OR LOSS OF, ANY CUSTOMER EQUIPMENT RESULTING FROM ANY CAUSE OTHER
THAN THE NEGLIGENCE OR WILLFUL MISCONDUCT OF EXODUS. TO THE EXTENT EXODUS IS
LIABLE FOR ANY DAMAGE TO, OR LOSS OF, CUSTOMER EQUIPMENT FOR ANY REASON, SUCH
LIABILITY WILL BE LIMITED SOLELY TO THE THEN-CURRENT REPLACEMENT VALUE OF THE
CUSTOMER EQUIPMENT EXCLUDING LOST DATA, SOFTWARE AND FIRMWARE.

     8.3 CONSEQUENTIAL DAMAGES WAIVER. EXCEPT FOR A BREACH OF SECTION 4.1
("CONFIDENTIAL INFORMATION") OF THIS AGREEMENT, IN NO EVENT WILL OTHER PARTY BE
LIABLE OR RESPONSIBLE TO THE OTHER FOR ANY TYPE OF INCIDENTAL, PUNITIVE,
INDIRECT OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, LOST REVENUE,
LOST PROFITS, REPLACEMENT GOODS, LOSS OF TECHNOLOGY, [illegible] OR SERVICES,
LOSS OF DATA, OR INTERRUPTION OR LOSS OF USE OF SERVICE OF EQUIPMENT, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, WHETHER ARISING UNDER THEORY OF
CONTRACT, TORT (INCLUDING NEGLIGENCE), DIRECT LIABILITY OR OTHERWISE.

     8.4 Basis of the Bargain; Failure of Essential Purpose. The parties
acknowledge that Exodus has set its prices and entered into this Agreement in
reliance upon the limitations of liability and the disclaimer of warranties and
damages set forth herein, and that the same form an essential basis of the
bargain between the parties. The parties agree that the limitations and
exclusions of liability and disclaimers specified to this Agreement will survive
and apply even if found to have failed of their essential purpose.

                                       14

<PAGE>

9. INDEMNIFICATION.

     9.1 Indemnification. Each party will indemnify, defend and hold the other
harmless from and against any and all costs, liabilities, losses, and expenses
(including, but not limited to, reasonable attorneys' fees) (collectively,
"Losses") resulting from any claim, suit, action, or proceeding (each, an
"Action") brought by any third party against the other or its affiliates
alleging (i) the infringement or misappropriation of any intellectual property
right relating to the delivery or use of the Service(s) (but excluding any
infringement contributory caused by the other party); (ii) personal injury
caused by the negligence or willful misconduct of the other party; and (iii) any
violation of or failure to comply with the Rules and Regulations. Customer will
indemnify, defend and hold Exodus, its affiliates and customers harmless from
and against any and all Losses resulting from or arising out of any Action
brought against Exodus, its affiliates or customers alleging any damage or
destruction to the Customer Area, the Internet Data Centers, Exodus equipment or
other customer equipment caused by Customer, its Representative(s) or designees.

     9.2 Notices. Each party's indemnification obligations hereunder shall be
subject to (i) receiving prompt written notice of the existence of any Action;
(ii) being able to, at the option, control the defense of such Action; (iii)
permitting the indemnified party to participate in the defense of any Action;
and (iv) receiving full cooperation of the indemnified party in the defense
thereof.

10. TERMINATION.

     10.1 Termination For Cause. Either party may terminate this Agreement if:
(i) the other party breaches any material term or condition of this Agreement
and fails to cure such breach within thirty (30) days after receipt of written
notice of the same, except in the case of failure to pay fees, which must be
cured within five (5) days after receipt of written notice from Exodus, (ii) the
other party becomes the subject of a voluntary petition in bankruptcy or any
voluntary proceeding relating to insolvency, receivership, liquidation, or
composition for the benefit of creditors; or (iii) the other party becomes the
subject of an involuntary petition in bankruptcy or any involuntary proceeding
relating to insolvency, receivership, liquidation, or composition for the
benefit of creditors, if such position or proceeding is not dismissed within
sixty (60) days of filing. Customer may also terminate this Agreement in
accordance with the terms set forth in paragraph 5.3(1) ("Termination Option For
Chronic Problems") of this Agreement.

     10.2 No Liability for Termination. Neither party will be liable to the
other for any termination or expiration of any Service or this Agreement in
accordance with its terms.

     10.3 Effect of Termination. Upon the effective date of termination of this
Agreement:

          (a) Exodus will immediately cease providing the Service(s);

                                       15

<PAGE>

          (b) any and all payment obligations of Customer under this Agreement
     for Service(s) provides through the date of termination will immediately
     become due;

          (c) within thirty (30) days of such termination, each party will
     return all Confidential Information of the other party in its possession
     and will not make or retain any copies of such Confidential Information
     except as required to comply with any applicable legal or accounting record
     keeping requirements; and

          (d) within five (5) days of such termination Customer shall (i) remove
     from the Internet Data Centers all Customer Equipment (excluding any Exodus
     Supplied Equipment) and any other Customer property; (ii) deliver or make
     available all Exodus Supplied Equipment to an authorized representative of
     Exodus, and (iii) return the Customer Area to Exodus in the same condition
     as it was on the Service Commencement Date for the Customer Area, normal
     wear and tear excepted. If Customer does not remove the Customer Equipment
     and its other property within such five-day period, Exodus will have the
     option to (i) move any and all such property to secure storage and charge
     Customer for the cost of such removal and storage and/or (ii) liquidate the
     property in any reasonable manner.

     10.4 Customer Equipment as Security. In the event that Customer fails to
pay Exodus all undisputed amounts owed Exodus under this Agreement when due,
Customer agrees that, upon delivery of written notice to Customer, Exodus may
(i) restrict Customer's physical access to the Customer Area and Equipment;
and/or (ii) take possession of any Customer Equipment and store it at Customer's
expense until taken in full or partial satisfaction of any lien or judgment, all
without being liable to prosecution for damages.

     10.5 Survival. The following provisions will survive any expiration or
termination of the Agreement: Sections 3, 4.1, 4.2, 4.4, 5.5, 6.0(d), 8, 9, 10
and 11 (excluding 11.2).

11. MISCELLANEOUS PROVISIONS.

     11.1 Force Majeure. Except for the obligations to make payments, neither
party will be liable for any failure or delay in its performance under this
Agreement due to any cause beyond its reasonable control, including acts of war,
acts of God, earthquakes, flood, embargo, riot, sabotage, labor shortage or
dispute, governmental act or failure of the internet (not resulting from the
actions or inactions of Exodus), provided that the delayed party; (a) gives the
other party prompt notice of such cause, and (b) uses its reasonable commercial
efforts to promptly correct such failure or delay in performance. If Exodus is
unable to provide Service(s0 for a period of thirty (30) consecutive days as a
result of a continuing force majeure event Customer may cancel the Service(s).

                                       16

<PAGE>

     11.2 No Lease; Agreement Subordinate to Master Lease. This Agreement is a
service agreement and is not intended to and will not constitute a lease of any
real property. Customer acknowledges and agrees that (i) it has been granted
only a license to occupy the Customer Area and use the Internet Data Centers and
any equipment provided by Exodus in accordance with this Agreement; (ii)
Customer has not been granted any real property interest in the Customer Space
or Internet Data Centers; (iii) Customer has no right as a tenant or otherwise
under any real property or landlord/tenant laws, regulations or ordinances; and
(iv) this Agreement, to the extent it involves the use of space leased by
Exodus, shall be subordinate to any lease between Exodus and the landlord(s).

     11.3 Marketing. Customer agrees that during the term of this Agreement
Exodus may publicly refer to Customer, orally and in writing, as a Customer of
Exodus. Any other references to Customer by Exodus requires the written consent
of Customer.

     11.4 Government Regulations. Customer will not export, re-export, transfer,
or make available, whether directly or indirectly, any regulated item or
information to anyone outside the U.S. in connection with this Agreement without
first complying with all export control laws and regulations which may be
imposed by the U.S. Government and any country or organization of nations within
whose jurisdiction Customer operator does business.

     11.5 Non-Solicitation. During the Term of this Agreement and continuing
through the first anniversary of the termination of this Agreement, Customer
agrees that it will not and will ensure that is affiliated do not, directly or
indirectly, solicit or attempt to solicit for employment any persons employed by
Exodus or contracted by Exodus to provide Services to Customer.

     11.6 No Third Party Beneficiaries. Exodus and Customer agree that, except
as otherwise expressly provided in this Agreement, there shall be no third party
beneficiaries to this Agreement, including but not limited to the insurance
providers for either party or the customers of Customer.

     11.7 Governing Law; Dispute Resolution. This Agreement is made under and
will be governed by and construed in accordance with the laws of the State of
California (except that body of law controlling conflicts of law) and
specifically excluding from application to this Agreement that law known as the
United Nations Convention on the International Sale of Goods. The parties will
endeavor to settle amicably by mutual discussions any disputes, differences, or
claims whatsoever related to this Agreement. Failing such amicable settlement,
any controversy, claim, or dispute arising under or relating to this Agreement,
including the existence, validity, interpretation, performance, termination or
breach thereof, shall finally be settled by arbitration in accordance with the
Arbitration Rules (and if customer is a non-U.S. entity, the International
Arbitration Rules) of the American Arbitration Association ("AAA"). There will
be three (3) arbitrators (the "Arbitration Tribunal"), the first of which will
be appointed by the claimant in its notice of arbitration, the second of which
will be appointed by the respondent within thirty (30) days of the appointment
of the first arbitrator and the third

                                       17

<PAGE>

of which will be jointly appointed by the party appointed arbitrators within
thirty (30) days thereafter. The language of the arbitration shall be English.
The Arbitration Tribunal will not have the authority to award punitive damages
to either party. Each party shall bear its own expenses, but the parties will
share equally the expenses of the Arbitration Tribunal and the AAA. This
Agreement will be enforceable, and any arbitration award will be final and
judgment thereon may be entered in any court of competent jurisdiction. The
arbitration will be held in San Francisco, California, USA. Notwithstanding the
foregoing, claims for preliminary injunctive relief, other pre-judgment
remedies, and claims for Customer's failure to pay for Services in accordance
with this Agreement may be brought in a state or federal court in the United
States with jurisdiction over the subject matter and parties.

     11.8 Severability; Waiver. In the event any provision of this Agreement is
held by a tribunal of competent jurisdiction to be contrary to the law, the
remaining provisions of this Agreement will remain in full force and effect. The
waiver of any breach or default of this Agreement will not constitute a waiver
of any subsequent breach or default, and will not act to amend or negate the
rights of the waiving party.

     11.9 Assignment. Customer may assign this Agreement in whole or part of a
corporate reorganization, consolidation, merger, or sale of substantially all of
its assets. Customer may not otherwise assign its rights or delegate its duties
under this Agreement either in whole or in part without the prior written
consent of Exodus, and any attempted assignment or delegation without such
consent will be void. Exodus may assign this Agreement in whole or in part.
Exodus also may delegate the performance of certain Services to third parties,
including Exodus' wholly owned subsidiaries, provided Exodus controls the
delivery of such Services to Customer and remains responsible to Customer for
the delivery of such Services. This Agreement will bind and inure to the benefit
of each party's successors and permitted assigns.

     11.10 Notice. Any notice or communication required or permitted to be given
hereunder may be delivered by hand, deposited with an overnight courier, sent by
email, confirmed facsimile, or mailed by registered or certified mail, return
receipt requested, postage prepaid, in each case to the address of the receiving
party as listed on the Order Form or at such other address as may hereafter be
furnished in writing by either party to the other party. Such notice will be
deemed to have been given as of the date it is delivered, mailed, emailed, faxed
or sent, whichever is earlier.

     11.11 Relationship of Parties. Exodus and Customer are independent
contractors and this Agreement will not establish any relationship of
partnership, joint venture, employment, franchise or agency between Exodus and
Customer. Neither Exodus nor Customer will have the power to bind the other or
incur obligations on the other's behalf without the other's prior written
consent, except as otherwise expressly provided herein.

     11.12 Entire Agreement; Counterparts; Originals. This Agreement, including
all documents incorporated herein by reference, constitutes the complete and
exclusive agreement between the parties with respect to the subject matter
hereof, and supersedes

                                       18

<PAGE>

and replaces any and all prior or contemporaneous discussions, negotiations,
understandings and agreements, written and oral, regarding such subject matter.
Any additional or different terms in any purchase order or other response by
Customer shall be deemed objected to by Exodus without need of further notice of
objection and shall be of no effect or in any way binding upon Exodus. This
Agreement may be executed in two or more counterparts, each of which will be
deemed an original but all of which together shall constitute one and the same
instrument. Once signed, any reproduction of this Agreement made by reliable
means (e.g., photocopy, facsimile) is considered an original. This Agreement may
be changed only by a written document signed by authorized representatives of
Exodus and Customer in accordance with this Section 11.12. For purposes of this
Agreement, the term "written" means anything reduced to a tangible form by a
party, including a printed or hand written document, e-mail or other electronic
format.

     11.13 Interpretation of Conflicting Terms. In the event of a conflict
between or among the terms in this Agreement, the Order Form(s), the
Specification Sheet(s), the Statement(s) of Work, and any other document made a
part hereof, the documents shall control in the following order: the Order Form
with the latest date, the Statement of Work, Specification Sheets, the
Agreement and other documents.

                                       19

<PAGE>

     Authorized representatives of Customer and Exodus have read the foregoing
and all documents incorporated therein and agree and accept such terms effective
as of the date first above written.

CUSTOMER                                EXODUS COMMUNICATIONS, INC.

Signature: /s/ Bob Gatewood             Signature: /s/ Gil Gallardo
           --------------------------              -----------------------------
Print Name: Bob Gatewood                Print Name: Gil Gallardo
            -------------------------               ----------------------------
Title: CTO                              Title: Corp Counsel
       ------------------------------          ---------------------------------
Date: 9/10/99                           Date: 9/29/99
      -------------------------------         ----------------------------------

This Agreement incorporates the following documents:

     -    Order Form(s)

               Specification Sheet(s)

               Statement(s) of Work (if applicable)

     -    Registration Form

     -    Addendum A - Equipment Purchase Terms and Conditions (if applicable)

                                       20

<PAGE>

                                   ADDENDUM A

                     EQUIPMENT PURCHASE TERMS AND CONDITIONS

     1. SHIPPING AND HANDLING. All equipment purchased by Customer (the
"Equipment") is provided FOB Santa Clara, California. Shipment will be made as
specified by Customer and Customer is solely responsible for all expenses in
connection with the delivery of the Equipment. The Equipment will be deemed
accepted by Customer upon receipt.

     2. PURCHASE PRICE AND TAXES. Customer shall pay to Exodus the purchase
price set forth in the applicable Order Form ("Purchase Price") for each item of
Equipment. Customer hereby grants and Exodus reserves a purchase money security
interest in the Equipment and the proceeds thereof as a security for its
obligations hereunder until payment of the full Purchase Price to Exodus. The
Purchase Price is due and payable prior to delivery of the Equipment. Customer
shall pay all taxes and other governmental charges assessed in connection with
the rental, use or possession of the Equipment including, without limitation,
any and all sales and/or use taxes and personal property taxes (other than taxes
on Exodus' net income).

     3. TITLE. Customer shall acquire title to the Equipment upon full payment
of the purchase price(s) set forth herein. Notwithstanding the foregoing, Exodus
and any licensor of rights to Exodus shall retain title to and rights in the
intellectual property (whether or not subject to patent or copyright) and
content contained in the materials supplied under the terms of this Agreement.

     4. SELECTION OF EQUIPMENT; MANUFACTURER WARRANTY. Customer acknowledges
that it has selected the Equipment and disclaims any statements made by Exodus.
Customer acknowledges and agrees that use and possession of the Equipment by
Customer shall be subject to and controlled by the terms of any manufacturer's
or, if appropriate, supplier's warranty, and Customer agrees to look solely to
the manufacturer or, if appropriate, supplier with respect to all mechanical
service and other claims, and the right to enforce all warranties made by said
manufacturer are hereby, to the extent Exodus has the right assigned to
Customer. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY AND IS IN LIEU OF ANY
ORAL REPRESENTATION AND ALL OTHER WARRANTIES AND DAMAGES, WHETHER EXPRESSED,
IMPLIED OR STATUTORY. EXODUS HAS NOT MADE NOR DOES MAKE ANY OTHER WARRANTIES OF
ANY KIND, EXPRESSED OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTY OF
FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR OF NON-INFRINGEMENT OF
THIRD PARTY RIGHTS AND AS TO EXODUS AND ITS ASSIGNEES, CUSTOMER PURCHASES THE
EQUIPMENT "AS IS".

     5. LIMITATION OF LIABILITY. Exodus's entire liability for any damages
which may arise hereunder, for any cause whatsoever, and regardless of the form
of action, whether is contract or in tort, including Exodus' negligence or
otherwise, shall be

                                       21

<PAGE>

limited to the Purchase Price paid by Customer for the Equipment. IN NO EVENT
WILL EXODUS BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES, OR FOR ANY LOSS OF BUSINESS OR PROSPECTIVE BUSINESS OPPORTUNITIES,
PROFITS, SAVINGS INFORMATION, USE OR OTHER COMMERCIAL OR ECONOMIC LOSS EVEN IF
EXODUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

     6. GOVERNING LAW; DISPUTE RESOLUTION. This Agreement is made under and will
be governed by and construed in accordance with the laws of the State of
California (except that body of law controlling conflicts of law) and
specifically excluding from application to this Agreement that law known as the
United Nations Convention on the International Sale of Goods. The parties will
endeavor to settle amicably by mutual discussions any disputes, differences, or
claims whatsoever related to this Agreement. Failing such amicable settlement,
any controversy, claim, or dispute arising under or relating to this Agreement,
including the existence, validity, interpretation, performance, termination or
breach thereof, the parties to this Agreement hereby consent to jurisdiction and
venue in the courts of the State of California and in the U.S. District Courts
in the City of San Francisco, California.

     7. MISCELLANEOUS. THE ABOVE TERMS AND CONDITIONS ARE THE ONLY TERMS AND
CONDITIONS UPON WHICH EXODUS IS WILLING TO SELL THE EQUIPMENT AND SUPERSEDES ALL
PREVIOUS AGREEMENTS, PROMISES OR REPRESENTATIONS, ORAL OR WRITTEN.

                                       22

<PAGE>
          Confidential Material omitted and filed separately with the
        Securities and Exchange Commission. Asterisks denote omissions.

ORDER FORM

CUSTOMER                BILL TO

Chip Ach                                Chip Ach
Athena Health Inc                       Athena Health Inc
00                                      311 Arsenal Street
   MSA ID:  ________________________
                                        WATERTOWN MA 02472
Addendum:   ________________________    USA

QUOTE DATE: April 30, 2007                   IDC          : Boston

FORM #    : 1-1YG4MA   REVISION: 1           SALES PERSON : _________________

VALID FROM: 4/9/2007   THROUGH : 4/30/2007   ORDER STATUS : Final

PARTNER

     Purchase Order No. No PO Required

          REQUESTED SERVICE DATE : 03/30/2007   INITIAL TERM: 12 Months

<TABLE>
<CAPTION>
                                                                           MONTHLY       NON-      EXTENDED        EXTENDED
                                                                          RECURRING   RECURRING     MONTHLY     NON-RECURRING
                                      DESCRIPTION*           IDC    QTY     COST         COST        FEES           FEES
                                ------------------------   ------   ---   ---------   ---------   -----------   -------------
<S>                             <C>                        <C>      <C>   <C>         <C>         <C>           <C>
NEW SERVICES

1    FH-VDC-FULL-RAW-CAGE-BO2   VDC Raw Space (No          Boston     6   $   *            *           *              *
                                Power/No Rack)Full Cage
                                in BO2

3    FH-PWR-20A120-L5-P1-BO2    20A-120V-L5-20 in BO2      Boston    39   $   *            *           *              *

5    FH-PWR-60A208-P1-BO2       60A-208V in BO2            Boston     2       *            *           *              *

6    BRH-BW-ASSET-FE            BRH - FastE Line           Boston     1       *            *           *              *
                                Asset

7    BRH-BW-ASSET-ML2-FE        BRH - Multiline Fast       Boston     1       *            *           *              *
                                Ethernet Line Asset

9    EXO-BW-BASE-U30            Bandwidth Base - 30 Mbps   Boston     1       *            *           *              *

10   EXO-TELCO-PC-T1            Recurring charge for T1    Boston     6       *            *           *              *
                                local loop from CO to
                                Exodus

11   EXO-TELCO-ENTR-DS3         Entrance Facility DS-3     Boston     1   $   *            *           *              *
                                                                                                  -----------       -----
     GROUP TOTAL                                                                                  $    *              *
                                                                                                  ===========       =====

CANCEL SERVICES

43   EXO-BW-BASE-U30            Bandwidth Base - 30 Mbps   Boston    -1   $   *            *           *              *

</TABLE>

                                      Customer's Initials /s/ JM
                                                          ----------------------
                                                     Order Form: 1-1YG4MA Rev: 1
                          Proprietary and Confidential               Page 1 of 5
<PAGE>
          Confidential Material omitted and filed separately with the
        Securities and Exchange Commission. Asterisks denote omissions.

ORDER FORM

<TABLE>
<CAPTION>
                                                                           MONTHLY       NON-      EXTENDED        EXTENDED
                                                                          RECURRING   RECURRING     MONTHLY     NON-RECURRING
                                      DESCRIPTION*           IDC    QTY     COST         COST        FEES           FEES
                                ------------------------   ------   ---   ---------   ---------   -----------   -------------
<S>                             <C>                        <C>      <C>   <C>         <C>         <C>           <C>
CANCEL SERVICES

45   EXO-TELCO-PC-T1            Recurring charge for T1    Boston    -4   $   *           *            *              *
                                local loop from CO to
                                Exodus

49   EXO-TELCO-PC-T1            Recurring charge for T1    Boston    -2   $   *           *            *              *
                                local loop from CO to
                                Exodus

50   EXO-PWR-20A120P1           20A-120V-L5-20..           Boston    -7   $   *           *            *              *

56   BRH-VDC-FULL-CAG           Business Ready Hosting     Boston    -4   $   *           *            *              *
                                for VDC Full-Cage

60   EXO-PWR-60A208P1           60A-208V.                  Boston    -2   $   *           *            *              *

63   BRH-BW-ASSET-ML2-FE        BRH - Multiline Fast       Boston    -1   $   *           *            *              *
                                Ethernet Line Asset

64   EXO-TELCO-PC-DS3           Recurring charge for DS3   Boston    -1   $   *           *            *              *
                                local loop from CO to
                                Exodus

66   EXO-FH-VDCCage             VDC - Cage                 Boston    -2   $   *           *            *              *

68   EXO-PWR-20A120P1           20A-120V-L5-20..           Boston    -1   $   *           *            *              *

69   EXO-PWR-20A120P1           20A-120V-L5-20..           Boston    -7   $   *           *            *              *

     Variable Usage above Base

     EXO-BW-BASE-UV             Variable Bandwidth         Boston         $   *
                                Price/Mbps Above Base
                                                                                                  -----------       -----
     GROUP TOTAL                                                                                       *              *
                                                                                                  ===========       =====
</TABLE>

All Currencies are in USD.

                                      Customer's Initials /s/ JM
                                                          ----------------------
                                                     Order Form: 1-1YG4MA Rev: 1
                          Proprietary and Confidential               Page 2 of 5
<PAGE>
          Confidential Material omitted and filed separately with the
        Securities and Exchange Commission. Asterisks denote omissions.

ORDER FORM

ORDER FORM TERMS AND CONDITIONS:

(1)  Customer hereby orders and SAVVIS Communications Corporation ("SAVVIS")
     hereby agrees to provide the services, hardware and/or software described
     in this Order Form (also known as a "Service Order") (collectively, "the
     Services").

(2)  THE SERVICES ARE PROVIDED PURSUANT TO THE TERMS AND CONDITIONS OF THIS
     ORDER FORM AND THE TERMS AND CONDITIONS OF THE FOLLOWING SAVVIS DOCUMENTS:

     a) Service Schedule(s), SAVVIS Service Guide, Service Addenda including any
     applicable Specification Sheet(s), SLA(s), and/or Statement(s) of work
     signed by Customer and SAVVIS.

     b) The appropriate services agreement between Customer and SAVVIS whether
     it be a Master Services Agreement or any predecessor agreement under which
     services are still currently being provided. A service order does not
     constitute a predecessor agreement for purposes of this section.

(3)  The Customer representative signing below hereby acknowledges and agrees
     that in the event that Customer does not issue a purchase order prior to
     the requested service date, this Order Form shall serve as Customer's
     purchase order. Customer further acknowledges that any additional or
     conflicting terms and conditions contained in Customer's purchase order
     shall not be applicable to the services to be provided hereunder, even if
     SAVVIS uses such purchase order for invoicing purposes.

(4)  Unless this Order Form is executed by Customer and accepted by SAVVIS (i)
     within thirty (30) days after its creation date (as indicated herein) or
     (ii) after the time period for which this Order Form is valid; this Order
     Form shall automatically expire and be rendered void. Without limiting any
     other SAVVIS right, acceptance of this Order Form is subject to SAVVIS
     credit approval.

(5)  If the Customer and/or its end users delay the Installation Date for the
     Services beyond ninety (90) days of Customer's signature of this Order Form
     and the parties have not agreed in writing to extend the Installation Date,
     then SAVVIS has the right to charge Customer a fee equivalent to one (1)
     month recurring charges as set forth in this Order Form (or  *  percent
     (*%) of the aggregate annualized value of the Order Form in the event a
     material portion of the Services do not contain monthly recurring charges).

                                      Customer's Initials /s/ JM
                                                          ----------------------
                                                     Order Form: 1-1YG4MA Rev: 1
                          Proprietary and Confidential               Page 3 of 5
<PAGE>
Confidential Materials omitted and filed separately with the Securities and
Exchange Commission. Asterisks denote omissions.

ORDER FORM

(6)  Customer shall have the right to terminate this Service Order at any time,
     with or without casue, upon thirty (30) days prior written notice, provided
     that in the event Customer terminates this Service Order during the first *
     (*) months of the Initial Term (i.e. *), Customer shall be liable for the
     cumulative total of the balance of *% of all monthly charges remaining
     through the end of the Initial Term plus any charges accrued but unpaid as
     of the effective date of termination. In the event Customer terminates this
     Service Order during the remainder of the Initial Term (i.e. effective on
     or after *), Customer shall not be liable for any early termination charge
     except that Customer shall pay for charges accrued but unpaid as of the
     effective date of termination. Notwithstanding anything to the contrary,
     the effective date of this Service Order shall be March 30, 2007.

     The provisions of this Item 6 shall supersede any conflicting items and
     conditions in a prior Order Form and the applicable services agreement.

                                      Customer's Initials /s/ JM
                                                          ----------------------
                                                     Order Form: 1-1YG4MA Rev: 1
                          Proprietary and Confidential               Page 4 of 5

<PAGE>

ORDER FORM

(7)  Customer shall have ten (10) calendar days from the date SAVVIS notifies
     Customer that the applicable services are installed and operational
     ("Installation Date") to confirm acceptance of such services via an
     executed Customer Acceptance Form ("CAF"). In the event Customer does not
     return the CAF to SAVVIS in accordance with this paragraph at SAVVIS' sole
     option, either (i) the CAF will be deemed accepted or (ii) SAVVIS may
     terminate the applicable Services without liability or further obligation,
     and Customer will be charged, and Customer agrees to pay for, any and all
     set-up fees, de-installation fees or charges for Services terminated.

(8)  SAVVIS may increase the rates associated with existing co-location facility
     services at any time after twelve months of the initial Installation Date
     for such Service in order to pass through increases in such Service's
     underlying power facility costs by notifying Customer at least thirty (30)
     days prior to the effective date of such rate change. For Services where
     the price stated on the Service Order includes charges for both space and
     power, forty-five percent (45%) of the aggregate charges will be considered
     power charges for purposes of calculating any such rate increase.

(9)  THERE ARE IMPORTANT TERMS AND CONDITIONS, WARRANTY DISCLAIMERS, LIABILITY
     LIMITATIONS AND SERVICES DESCRIPTIONS CONTAINED IN THE APPLICABLE SERVICES
     AGREEMENTS, SERVICE SCHEDULES, AND SERVICE ADDENDA (INCLUDING SPECIFICATION
     SHEETS AND/OR STATEMENTS OF WORK) ("CONTRACT DOCUMENTS"). DO NOT SIGN THIS
     ORDER FORM UNTIL YOU HAVE READ ALL THE TERMS OF THE CONTRACT DOCUMENTS THAT
     PERTAIN TO THIS ORDER. YOUR SIGNATURE BELOW INDICATES YOU HAVE READ THE
     TERMS OF THIS ORDER FORM AND THE ADDITIONAL TERMS IN THE CONTRACT DOCUMENTS
     AND AGREE TO BE BOUND BY THEM.

CUSTOMER                                SAVVIS COMMUNICATIONS CORPORATION

Signature: /s/ JAMES M. MACDONALD       Signature:
           --------------------------              -----------------------------
Print Name: JAMES M. MACDONALD          Print Name:
Title: CHIEF OPERATING OFFICER                      ----------------------------
Date: APRIL 30, 2007                    Title:
                                               ---------------------------------
                                        Date:
                                              ----------------------------------

                                      Customer's Initials
                                                          ----------------------
                                                     Order Form: 1-1YG4MA Rev: 1
                          Proprietary and Confidential               Page 5 of 5

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