Document:

<PAGE>

                                                                   EXHIBIT 10.17

                        ADMINISTRATIVE SERVICES AGREEMENT
                                    "Nevada"

         This Administrative Services Agreement ("Agreement") is entered into as
of January 9, 1998 ("Effective Date") by and among NEVADA RADIATION THERAPY
MANAGEMENT SERVICES, INC., a Nevada corporation ("MANAGEMENT SERVICES") and
MICHAEL J. KATIN, M.D., PROF. CORP., a Nevada professional corporation (the
"PC").

                                    RECITALS

         A.       The PC is a Nevada professional corporation that engages in
the business of providing or arranging for the provision of health care services
(the "Practice"). The PC has entered into and throughout the term of this
Agreement may (if MANAGEMENT SERVICES does not do so itself as provided herein)
continue to enter into arrangements with insurers, HMOs and other third-party
payors ("Payors") to provide or arrange for the provision of health care
services to persons covered by those Payors ("Enrollees").

         B.       The PC has entered into written employment agreements with
physicians and other health care providers and health care professionals
("Employed Providers") licensed to practice in the State of Nevada. The PC may
also enter into independent contractor agreements with various physicians and
other health care providers and health care professionals ("Contracting
Providers") to assist the PC in providing or arranging for the provision of
health care services to Enrollees and other patients of the PC (collectively,
"Patients").

         C.       MANAGEMENT SERVICES engages in the business of providing
certain administrative and support services concerning the day-to-day affairs of
radiation therapy offices (the "Offices"), both in their startup and established
phases, and in providing space in the Offices, equipment, furnishings, supplies,
inventory, personnel and working capital to Offices and facilities management in
connection therewith.

         D.       The PC desires to secure certain administrative services from
MANAGEMENT SERVICES in connection with its operation of the Practice in the
Centers, and to lease from MANAGEMENT SERVICES certain space, equipment,
furnishings, supplies and inventory in connection therewith.

         E.       The PC and MANAGEMENT SERVICES desire to enter into a written
agreement for the provision by MANAGEMENT SERVICES, on an exclusive basis, of
administrative services to the PC with respect to the Practice, and for the
provision of space, furnishings, supplies, inventory, non-medical personnel and
management services to the Practice, so as to permit the PC to devote its
efforts on a concentrated and continuous basis to the rendering of medical
services to its Patients.

         NOW, THEREFORE, in consideration of the mutual covenants and conditions
contained herein, the parties agree as follows:

<PAGE>

                          I. RESPONSIBILITIES OF THE PC

         1.1.     Sole Responsibility for All Medical and Professional Matters.
All medical and professional matters relating to the provision of radiation
therapy or oncology services at the Offices shall be the sole responsibility of
the PC. The PC shall use and occupy the facilities provided by MANAGEMENT
SERVICES hereunder exclusively for the practice of medicine. The PC expressly
acknowledges that the medical practice or practices conducted at these
facilities shall be conducted solely by Employed Providers and Contracting
Providers.

         1.2.     Employed Providers and Contracting Providers. The PC shall
have complete control of and responsibility for the hiring, engagement,
compensation, supervision evaluation, and termination of all Employed Providers
and Contracting Providers, including nurses, physician assistants and other
licensed healthcare professionals. With respect to physicians, the PC shall only
employ and contract with licensed physicians meeting applicable credentialing
guidelines established by the PC. The PC shall be responsible for the payment of
salaries and wages, compensation, payroll taxes, employee benefits, and all
other taxes and charges now or hereafter applicable to Employed Providers and
Contracting Providers. Prior to making any changes with respect to any of the
Employed Providers or Contracting Providers, the PC shall consult with
MANAGEMENT SERVICES, although MANAGEMENT SERVICES shall provide input only and
shall not conclude whether an Employed Provider should be hired or terminated.
The PC shall also consult with MANAGEMENT SERVICES with regard to the terms of
contracts entered into between the PC and Employed Providers and Contracting
Providers and the terms and conditions of their employment or engagement as
independent contractors, as applicable.

         1.3.     Fees, Charges and Payor Agreements. The PC shall, after
consultation with MANAGEMENT SERVICES, determine the fees, charges, premiums, or
other amounts due in connection with its delivery of health care services to
Patients. Such fees, charges, premiums, or other amounts, regardless of whether
determined on a fee-for- service, capitated, prepaid, or other basis, shall be
reasonable and consistent with the fees, charges, premiums and other amounts due
to health care providers for similar services within the community under the
type of reimbursement program involved. MANAGEMENT SERVICES shall provide input
relating to the foregoing but shall not conclude the level of fees, charges,
premiums, or other amounts the PC should establish.

         1.4.     Compliance with Law. The PC shall require all of its Employed
Providers and Contracting Providers to comply with all laws, regulations, and
ethical and professional standards applicable to the practice of medicine.
Employed Providers and Contracting Providers who are physicians shall at all
times be licensed to practice medicine in the State of Nevada and all other
states in which an Office at which such physician provides patients medical
services is located.

         1.5.     Offices; Hours of Operation; Staffing. The PC shall conduct
the Practice from the current Offices located in Las Vegas, Nevada, at 1176
Vegas Valley Drive and 311 North Buffalo, Suite B, as well as such hospitals and
other facilities as may be agreed upon by MANAGEMENT SERVICES and the PC from
time to time. Changes in or

                                     - 2 -
<PAGE>

additions to the Offices shall require the consent of both parties which consent
shall not be unreasonably withheld. Any additional or substitute Office shall be
deemed to be part of the Practice for the purposes of this Agreement. The hours
of operation and the medical staffing of the Offices shall be established by the
agreement of the PC and MANAGEMENT SERVICES from time to time hereafter.

         1.6.     Quality Assurance. The PC shall rigorously monitor utilization
and quality of services provided by Employed Providers and Contracting
Providers, shall develop, maintain and administer quality assurance programs and
performance standards and shall take all steps necessary to remedy any and all
deficiencies in the efficiency or the quality of medical care provided.

         1.7.     Patient Referrals. The parties agree that the benefits to the
PC hereunder do not require, are not payment for, and are not in any way
contingent upon the admission, referral or any other arrangements for the
provision of any item or service offered by MANAGEMENT SERVICES or any
Affiliate, as defined in Section 8.21 of this Agreement, of MANAGEMENT SERVICES
to any of the PC's Patients in any facility or laboratory controlled, managed or
operated by MANAGEMENT SERVICES or any Affiliate of MANAGEMENT SERVICES.

         1.8.     Professional Dues and Education Expenses. The PC and its
Employed Providers and Contracting Providers shall be solely responsible for the
cost of membership in professional associations, and continuing professional
education. The PC shall ensure that each of its Employed Providers and
Contracting Providers participates in such continuing medical education as is
necessary for such provider to remain current with professional licensure and
community standards.

         1.9.     Professional Insurance Eligibility. The PC shall cooperate
with MANAGEMENT SERVICES in the obtaining and retaining of professional
liability insurance by assuring that either its Employed Providers and
Contracting Providers are insurable or instituting proceedings to terminate any
Employed Provider of Contracting Provider who is not insurable or loses his or
her insurance eligibility. Termination shall be effective no more than thirty
(30) days from such determination. The PC shall require all Employed Providers
and Contracting Providers to participate in an on-going risk management program.

         1.10.    Fees for Professional Services. MANAGEMENT SERVICES shall be
solely responsible for legal, accounting and other professional services
incurred by the PC in operating the Practice absent a violation by the PC of any
provisions of this Agreement.

                   II. RESPONSIBILITIES OF MANAGEMENT SERVICES

         2.1.     General Responsibility. MANAGEMENT SERVICES shall have general
responsibility for providing fiscal services, administrative services, and other
strategic and tactical support services to the PC with respect to the Practice,
except as otherwise provided in this Agreement. MANAGEMENT SERVICES shall
perform all required functions in accordance with sound management techniques.
Notwithstanding

                                     - 3 -

<PAGE>

MANAGEMENT SERVICES' general and specific rights and responsibilities set forth
in this Agreement, the PC shall have full authority and control with respect to
all medical, professional and ethical determinations over the PC's Practice to
the extent required by federal, state and local laws, rules and regulations.
MANAGEMENT SERVICES shall not engage in activities which constitute the practice
of medicine under applicable laws. MANAGEMENT SERVICES shall neither exercise
control over nor interfere with the physician-patient relationship, which shall
be maintained strictly between the physicians employed by or contracting with
the PC and the PC's Patients.

         2.2.     Responsibilities with Regard to Selected Patient- Related
Matters.

                  (a)      Patient Relations, Scheduling, Etc. MANAGEMENT
SERVICES shall assist the PC in maintaining positive Patient relations by, among
other things, in conjunction with and at the direction of the PC: scheduling
Patient appointments; responding to Patient grievances and complaints in matters
other than medical evaluation, diagnosis, and treatment; and establishing and
maintaining in the PC's name and on its behalf Patient transfer arrangements to
expedite referrals where medically necessary, as determined and requested by the
attending physician.

                  (b)      Recordkeeping. MANAGEMENT SERVICES shall assist the
PC in maintaining Patient medical records in accordance with applicable laws
concerning their confidentiality and retention, and promptly making such records
available to the PC's Employed Providers, Contracting Providers and other
appropriate recipients. Notwithstanding the foregoing sentence, Patient medical
records shall be and shall remain the property of the PC, and the content
thereof shall be solely the responsibility of the PC.

                  (c)      Quality Assurance.

                           (i)      In General. MANAGEMENT SERVICES shall assist
the PC, in accordance with criteria established by the PC, in the development
and implementation of appropriate quality assurance programs, including
development of performance and utilization standards, sampling techniques for
case review, and preparation of appropriately documented studies.
Notwithstanding the foregoing, MANAGEMENT SERVICES shall not perform any duties
that constitute the corporate practice of medicine in Nevada and all other
states in which a Office at which the PC provides patient medical services is
located.

                           (ii)     Periodic Independent Review. On behalf of
the PC, MANAGEMENT SERVICES may periodically perform quality assurance and
utilization reviews through nurses employed by it; provided, however, that
MANAGEMENT SERVICES shall not engage in activities which constitute the practice
of medicine under applicable law. Alternatively, MANAGEMENT SERVICES may
periodically arrange for an independent quality assurance and utilization review
to be performed by persons who are unrelated to the PC or MANAGEMENT SERVICES,
or to any Affiliate of the PC or MANAGEMENT SERVICES, which has expertise in
such areas, and which has been approved in advance by the PC. Such review shall
include a random sampling of medical records (consistent with laws regarding the
confidentiality of medical records), an analysis

                                     - 4 -
<PAGE>

of the PC's quality assurance utilization review procedures, and an analysis of
the appropriateness of costs associated with operating the PC's medical practice
at the Practice.

         2.3.     Responsibilities with Regard to Selected Financial Matters.

                  (a)      Billing. MANAGEMENT SERVICES shall submit on a timely
basis all bills and necessary documentation required by Patients and Payors in
order to obtain payment in connection with the PC's delivery of health care
services at the Practice or its arrangement for the delivery of such services.
In seeking such payment, MANAGEMENT SERVICES shall act as the PC's exclusive
agent in billing and collecting professional fees, charges and other amounts
owed to the PC. In this connection, the PC hereby appoints MANAGEMENT SERVICES,
during the term of this Agreement, as the PC's true and lawful attorney-in-fact,
with power of substitution, for the following purposes relating to the Practice:

                           (i)      To bill the PC's Patients on the PC's
behalf.

                           (ii)     To collect accounts receivable generated by
such billings on the PC's behalf, including, where deemed appropriate by
MANAGEMENT SERVICES and approved in advance by the PC, settling and compromising
claims, assigning such accounts receivable to a collection agency or the
bringing of legal action against a Patient or Payor on the PC's behalf.

                           (iii)    To receive payments on behalf of the PC from
Patients and Payors, to cause such payments to be deposited into appropriate
depository accounts (each such depository account, a "Collections Account") and
to write checks against or otherwise withdraw such payments to pay the PC
Expenses (as hereinafter defined).

                  (b)      Accounting. MANAGEMENT SERVICES shall direct and
maintain the operation of an appropriate accounting system with respect to the
PC's operation of the Practice which shall perform all bookkeeping and
accounting services required for the operation of the Practice, including the
maintenance, custody and supervision of business records, ledgers and reports;
the establishment, administration and implementation of accounting procedures,
controls and systems. Such accounting system shall allow MANAGEMENT SERVICES to
prepare the reports specified in Section 2.3(c).

                  (c)      Reporting. MANAGEMENT SERVICES shall present to the
PC reports on the financial condition of the PC on the basis set forth below in
clauses (i) and (ii) and such other reports that the PC may reasonably request,
including daily activity reports, weekly analyses, alternative delivery system
reports, backlog reports and the like. MANAGEMENT SERVICES also shall provide
such reports as may be required by any regulatory agency having jurisdiction
over the operations of the PC.

                  The reports initially required to be delivered to the PC under
this Section 2.3(c) with respect to the Practice are as follows:

                                     - 5 -

<PAGE>

                           (i)      As soon as possible after the close of each
month, a balance sheet and a related statement of revenues and expenses showing
the results of the PC's operations for the preceding month of the fiscal year
and the year to date.

                           (ii)     As soon as possible after the close of each
fiscal year, a balance sheet and related statement of revenues and expenses
showing the results of the PC's operations during that fiscal year.

         2.4.     Responsibilities with Respect to Facilities Management.

                  (a)      Office Management Services. MANAGEMENT SERVICES shall
provide, supervise and direct the development of appropriate and efficient
office management services with respect to the PC's operation of the Practice.

                  (b)      Offices. MANAGEMENT SERVICES shall provide, manage
and maintain the real property comprising the Offices and reasonable
improvements during the term of this Agreement. In consultation with the PC,
MANAGEMENT SERVICES shall oversee all management, maintenance and other
decisions pertaining to the Offices consistent with the terms of this Agreement.
MANAGEMENT SERVICES shall maintain the Offices in good condition and repair,
reasonable wear and tear excepted. MANAGEMENT SERVICES shall provide such
additional and/or replacement facilities as the PC and MANAGEMENT SERVICES
agree, from time to time. MANAGEMENT SERVICES shall provide the PC with all
utilities (including water, gas and electricity), heat, air conditioning,
telephone, janitorial services and disposal services (including the disposal of
medical wastes) required in connection with the operation of the Centers.

                  (c)      Use of Assets.

                           (i)      MANAGEMENT SERVICES shall lease or purchase
and, when necessary, replace equipment and furnishings needed for the delivery
of health care services by the PC at the Offices and for the delivery of
services provided by MANAGEMENT SERVICES pursuant to this Agreement. MANAGEMENT
SERVICES shall consult with the PC with respect to the suppliers, prices and
specifications of such equipment and furnishings. MANAGEMENT SERVICES shall use
its best efforts to keep and maintain the equipment and furnishings used by the
PC at the Offices in good working order and condition.

                           (ii)     All assets provided or purchased under this
Agreement by MANAGEMENT SERVICES, including any management information systems,
shall remain the property of MANAGEMENT SERVICES and the PC shall have the right
to use such assets only during the term of this Agreement.

                           (iii)    Nothing in this Agreement shall be construed
to affect or limit in any way the professional discretion of the PC to select
and use equipment, furnishings, inventory and supplies purchased by MANAGEMENT
SERVICES in accordance with the terms of this Agreement insofar as such
selection or use constitutes or might constitute the practice of medicine.

                                     - 6 -
<PAGE>

                  (d)      Supplies and Inventory. MANAGEMENT SERVICES shall
provide and replenish, as necessary and as may be permitted by applicable law,
the inventory and supplies needed for the delivery of medical services by the
PC, and for the delivery of services by MANAGEMENT SERVICES pursuant to this
Agreement. MANAGEMENT SERVICES shall consult with the PC with respect to the
suppliers, prices and specifications of such inventory and supplies.

                  (e)      No Warranties. THE PC ACKNOWLEDGES THAT MANAGEMENT
SERVICES MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED, AS TO THE
SUITABILITY OR ADEQUACY OF ANY FACILITIES, EQUIPMENT, FURNISHINGS, INVENTORY OR
SUPPLIES PROVIDED PURSUANT TO THIS AGREEMENT FOR THE CONDUCT OF A MEDICAL
PRACTICE OR FOR ANY OTHER PARTICULAR PURPOSE.

         2.5.     Other Responsibilities.

                  (a)      Public Relations. MANAGEMENT SERVICES shall provide
services reasonably necessary for enhancing public relations for the PC's health
care services and shall submit any public relations programs for prior review
and revision, if necessary, and approval by the PC. Such public relations shall
comply with applicable laws and regulations governing the use of promotional
activities by the medical profession and with applicable standards of medical
ethics.

                  (b)      Insurance.

                           (i)      Property and Liability Insurance. MANAGEMENT
SERVICES shall obtain and maintain during the term of this Agreement, if
available on commercially reasonable terms, (a) property damage insurance
protecting the Practice premises and the personal property located therein
against such hazards and in such amounts as MANAGEMENT SERVICES determines are
reasonably prudent; and (b) general liability insurance in such amounts as
MANAGEMENT SERVICES determines are reasonably prudent.

                           (ii)     General Liability Insurance. The PC shall
obtain and maintain during the term of this Agreement general liability
insurance in such amounts as the PC determines are reasonably prudent. The PC
shall name MANAGEMENT SERVICES as an additional insured on such policies.

                           (iii)    Malpractice Insurance. It is understood that
the PC and its Employed Providers shall, at the PC's cost, at all times be
covered by malpractice insurance with coverage in usual and customary amounts
for practitioners of the same profession and specialties in Nevada and, if
applicable, other states. The PC shall ensure that its written agreements with
Contracting Providers who are physicians require such Contracting Providers to
at all times be covered by malpractice insurance in amounts that are usual and
customary for practitioners of the same profession and specialty in Nevada and,
if applicable, other states. Such malpractice policies shall name MANAGEMENT
SERVICES as an additional insured.

                                     - 7 -
<PAGE>

                           (iv)     Copies of Insurance Policies. MANAGEMENT
SERVICES or the PC shall, upon request by the PC or MANAGEMENT SERVICES, as the
case may be, promptly provide the PC or MANAGEMENT SERVICES, as the case may be,
with copies of all policies of insurance that it procures under this Agreement.
Each such policy shall provide that it cannot be modified or terminated except
after thirty (30) days written notice to MANAGEMENT SERVICES.

                  (c)      Personnel. MANAGEMENT SERVICES shall furnish the
services of all personnel other than physicians, nurses, physician assistants or
other licensed healthcare professionals required for the operation of the
Practice. Except as specifically provided in this Section 2.5(c), MANAGEMENT
SERVICES has the power to recruit, hire, train, promote, assign, set the
compensation level for, and discharge all personnel other than physicians,
nurses, physician assistants or other licensed healthcare professionals. Any
personnel employed by MANAGEMENT SERVICES who perform patient care services
shall perform such services under the exclusive direction, supervision and
control of the PC, while all other services of MANAGEMENT SERVICES personnel
shall be performed under the exclusive direction, supervision and control of
MANAGEMENT SERVICES. If the PC is dissatisfied with the services of any
personnel employed by MANAGEMENT SERVICES, the PC shall consult with MANAGEMENT
SERVICES. MANAGEMENT SERVICES shall in good faith determine whether the
performance of that employee could be brought to acceptable levels through
counsel and assistance, or whether, if requested by the PC (provided that such
employee is not an officer or senior manager of MANAGEMENT SERVICES), such
employee should be removed from providing services for the PC. Employee
assignments shall be made with the intention of assuring consistent and
continued rendering of quality services and to ensure prompt availability and
accessibility of personnel to physicians in order to develop constant, familiar
and routine working relationships between the Employed Providers, Contracting
Providers and MANAGEMENT SERVICES personnel.

                  (d)      Employed Providers. MANAGEMENT SERVICES shall assist
the PC in the administration of any employee benefit plans established by the PC
in compliance with the provisions of Section 1.10 hereof.

                  (e)      Managed Care Agreements. MANAGEMENT SERVICES shall
negotiate and administer all managed care agreements on behalf of the PC and
shall consult with the PC on all professional and clinical matters relating
thereto.

                           III. FINANCIAL ARRANGEMENTS

         3.1.     Service Fee. For the services to be provided hereunder by
MANAGEMENT SERVICES, the PC shall pay to MANAGEMENT SERVICES a monthly Service
Fee of $21,000. The parties agree that the Service Fee represents the fair
market value of the services provided by MANAGEMENT SERVICES hereunder and that
the parties shall meet annually to reevaluate the value of services provided by
MANAGEMENT SERVICES and shall establish the fair market value thereof for
purposes of this Section 3.1.

                                     - 8 -
<PAGE>

         3.2.     Security Agreement; the PC Expenses. To secure the PC's
payment obligations hereunder, the PC is concurrently herewith entering into a
security agreement, in form acceptable to MANAGEMENT SERVICES, to grant to
MANAGEMENT SERVICES a security interest in the accounts receivable of the PC and
all of the PC's rights to receive payments under managed care contracts. The PC
shall cooperate with MANAGEMENT SERVICES and execute all reasonably necessary
documents in connection with the granting of such security interest.

         All payments on behalf of the PC from Patients and Payors shall be
deposited into one or more Collection Accounts. To the extent the PC receives
any such payments, the PC shall direct such payments to MANAGEMENT SERVICES for
deposit in one or more Collection Accounts.

         3.3.     Arbitration. Any controversy or claim arising out of or
relating to this Agreement or the transactions contemplated hereby, including
any controversy or claim arising out of or relating to the parties' decision to
enter into this Agreement or the transactions contemplated hereby, shall be
settled by binding arbitration. Each party shall select an arbitrator who has at
least three (3) years experience in health care or medical practice management
or in health care or medical practice dispute resolution. The arbitration
proceedings shall be confidential and the arbitrators may issue appropriate
protective orders to safeguard each party's confidential information. Such
protective orders shall be enforceable by any court of competent jurisdiction.
Except as specifically provided in this section, the arbitration shall be
conducted in accordance with the rules of conciliation and arbitration of the
American Arbitration Association. The two arbitrators shall agree upon any issue
no later than thirty (30) days after the date the second arbitrator has been
engaged, and shall take into account the principles and objectives set forth in
paragraph (b) below. If the two arbitrators cannot agree on a determination,
then within five (5) days thereafter the two arbitrators shall select a third
arbitrator, who shall have the same qualifications required for the first two
arbitrators. No later than thirty (30) days after the date the third arbitrator
is engaged, he or she shall determine which of the two positions best satisfies
the provisions of the contract and the intent of the parties, taking into
account the principles and objectives set forth in paragraph (b) below. The
third arbitrator shall have no right to propose a middle ground between the two
or to make any modification of the proposals of either party. The third
arbitrator's determination shall be final and binding on all parties. The cost
and expense of the third arbitrator shall be shared equally between the parties.
If either party fails to engage an arbitrator as required hereunder, the
arbitrator selected by the other party shall conduct the arbitration and make
the final decision in accordance with this Section 3.4.

                  (b)      The arbitration shall be conducted at the offices of
MANAGEMENT SERVICES or such other mutually acceptable site. In conducting the
arbitration, the arbitrator(s) shall consider the following principles and
objectives of the parties in entering into this Agreement:

                           (i)      The parties contemplate that the PC shall
pay MANAGEMENT SERVICES a flat fee for the fair market value of MANAGEMENT
SERVICES' hereunder.

                                     - 9 -
<PAGE>

                           (ii)     The parties agree that MANAGEMENT SERVICES
shall in no way provide medical services to Patients.

                           (iii)    The parties contemplate an expansion of the
Practice by acquisition or purchase of other Offices and by expansion of the
variety of specialty medical services provided and/or ancillary services
provided.

                  IV. REPRESENTATIONS AND WARRANTIES; COVENANTS

         4.1.     Representations and Warranties and Covenants of the PC.

                  (a)      The PC hereby represents and warrants to MANAGEMENT
SERVICES as follows:

                           (i)      The PC is and shall remain during the term
of this Agreement a professional corporation duly organized, validly existing
and in good standing under the laws of the State of Nevada, actively engaged in
the practice of medicine, and possessing full corporate power and authority to
own its properties and to conduct the business in which it engages.

                           (ii)     The PC has full corporate power and
authority to execute and deliver this Agreement and to engage in the
transactions and obligations contemplated by this Agreement. Upon its execution,
this Agreement shall constitute a valid and binding obligation of the PC,
enforceable in accordance with its terms, except as limited by applicable
bankruptcy, insolvency, moratorium, or other similar laws affecting generally
the rights of creditors and by principles of equity. The party executing this
Agreement on behalf of the PC is duly authorized to do so.

                           (iii)    The consummation of the transactions
contemplated by this Agreement will not: result in a breach of the terms,
provisions, or conditions of or constitute a default under the Articles of
Incorporation, By-Laws or other enabling or governing instruments of the PC or
any agreement to which the PC is a party or by which it is bound; or, to the
best knowledge of the PC, constitute a violation of any applicable law or
regulation.

                  (b)      The PC hereby covenants to MANAGEMENT SERVICES that
it shall not, without the prior written consent of MANAGEMENT SERVICES, take any
action to terminate or nullify, or release any Employed Provider from, the terms
of any noncompetition covenant set forth in any employment agreement between the
PC and such Employed Provider.

         4.2.     Covenants and Warranties of MANAGEMENT SERVICES. MANAGEMENT
SERVICES hereby represents and warrants to the PC as follows:

                  (a)      MANAGEMENT SERVICES is and shall remain during the
term of this Agreement a corporation which is duly organized, validly existing
and in good

                                     - 10 -
<PAGE>

standing under the laws of the State of Nevada, possessing full corporate power
and authority to own its properties and to conduct the business in which it
engages.

                  (b)      MANAGEMENT SERVICES has full corporate power and
authority to execute and deliver this Agreement and to engage in the
transactions and obligations contemplated by this Agreement. Upon its execution,
this Agreement shall constitute a valid and binding obligation of MANAGEMENT
SERVICES, enforceable in accordance with its terms, except as limited by
applicable bankruptcy, insolvency, moratorium, or other similar laws affecting
generally the rights of creditors and by principles of equity. The party
executing this Agreement on behalf of MANAGEMENT SERVICES is duly authorized to
do so.

                  (c)      The consummation of the transactions contemplated by
this Agreement will not: result in any breach of the terms, provisions or
conditions of or constitute a default under the Certificate of Incorporation,
Bylaws or other enabling or governing instruments of MANAGEMENT SERVICES or any
agreement to which MANAGEMENT SERVICES is a party or by which it is bound; or,
to the best knowledge of MANAGEMENT SERVICES, constitute a violation of any
applicable law or regulation.

                             V. TERM AND TERMINATION

         5.1      Initial and Renewal Term. The term of this Agreement will be
for an initial period of twenty-five (25) years after the Effective Date, and
shall be automatically renewed for successive five (5) year periods thereafter
(collectively, the "Term"), provided that neither MANAGEMENT SERVICES nor the PC
shall have given notice of termination of this Agreement at least one hundred
twenty (120) days before the end of the initial term or any renewal term, or
unless otherwise terminated as provided in Section 5.2 of this Agreement.

         5.2      Termination.

                  (a)      Termination by the PC. The PC may immediately
terminate this Agreement at its discretion, upon written notice as follows:

                           (i)      If MANAGEMENT SERVICES becomes insolvent by
reason of its inability to pay its debts as they mature; is adjudicated bankrupt
or insolvent; files a petition in bankruptcy, reorganization or similar
proceeding under the bankruptcy laws of the United States or shall have such a
petition filed against it which is not discharged within thirty (30) days; has a
receiver or other custodian, permanent or temporary, appointed for its business,
assets or property; makes a general assignment for the benefit of creditors; has
its bank accounts, property or accounts attached; has execution levied against
its business or property; or voluntarily dissolved or liquidates or has a
petition filed for corporate dissolution and such petition is not dismissed
within thirty (30) days;

                           (ii)     If the MANAGEMENT SERVICES fails to comply
with any material provision of this Agreement, or any other agreement with the
PC, and does not

                                     - 11 -
<PAGE>

correct such failure within sixty (60) days after written notice of such failure
to comply is delivered by the PC specifying the nature of the breach in
reasonable detail.

                  (b)      Termination by MANAGEMENT SERVICES. MANAGEMENT
SERVICES may immediately terminate this Agreement at its discretion, upon
written notice as follows:

                           (i)      If the PC becomes insolvent by reason of its
inability to pay its debts as they mature; is adjudicated bankrupt or insolvent;
files a petition in bankruptcy, reorganization or similar proceeding under the
bankruptcy laws of the United States or shall have such a petition filed against
it which is not discharged within thirty (30) days; has a receiver or other
custodian, permanent or temporary, appointed for its business, assets or
property; makes a general assignment for the benefit of creditors; has its bank
accounts, property or accounts attached; has execution levied against its
business or property; or voluntarily dissolves or liquidates or has a petition
filed for corporate dissolution and such petition is not dismissed within thirty
(30) days; or

                           (ii)     If the PC fails to comply with any material
provision of this Agreement with MANAGEMENT SERVICES, and does not correct such
failure within sixty (60) days after written notice of such failure to comply is
delivered by MANAGEMENT SERVICES specifying the nature of the breach in
reasonable detail.

                  (c)      Termination by Agreement. In the event the PC and
MANAGEMENT SERVICES shall mutually agree in writing, this Agreement may be
terminated on the date specified in such written agreement.

                  (d)      Legislative. Regulatory or Administrative Change. In
the event there shall be a change in the Medicare or Medicaid statutes, federal
statutes, state statutes, case laws, administrative interpretations, regulations
or general instructions, the adoption of new federal or state legislation, or a
change in any third-party reimbursement system, any of which are reasonably
likely to materially and adversely affect the manner in which either party may
perform or be compensated for its services under this Agreement or which shall
make this Agreement or any related agreements unlawful or unenforceable, or
which would be reasonably likely to subject either party to this Agreement, or
any member, shareholder, officer, director, employee, agent or affiliated
organization to any civil or criminal penalties or administrative sanctions, the
parties shall immediately use their best efforts to enter into a new service
arrangement or basis for compensation for the services furnished pursuant to
this Agreement that complies with the law, regulation, or policy, or which
minimizes the possibility of such penalties, sanctions or unenforceability, and
that approximates as closely as possible the economic position of the parties
prior to the change. If the parties are unable to reach a new agreement within a
reasonable time, then either party may submit the issue to arbitration pursuant
to Section 3.3 for the purpose of reaching an alternative arrangement that is
equitable under the circumstances.

         5.3      Effects of Termination. Upon termination of this Agreement, as
provided in this Article V, neither party shall have any further obligations
hereunder

                                     - 12 -
<PAGE>

except for (i) obligations accruing prior to the date of termination, including,
without limitation, payment of the Service Fee relating to services provided
prior to the termination of this Agreement, (ii) obligations, promises, or
covenants set forth herein that are expressly made to extend beyond the Term,
including, without limitation, insurance, indemnities and non-competition
provisions, which provisions shall survive the expiration or termination of this
Agreement. In effectuating the provisions of this Section 5.3, the PC
specifically acknowledges and agrees that if this Agreement terminates pursuant
to Sections 5.2(b) or (d), MANAGEMENT SERVICES shall continue for a period not
to exceed ninety (90) days to collect and receive on behalf of the PC on an
exclusive basis all cash collections from accounts receivable in existence at
the time this Agreement is terminated, it being understood that (a) such cash
collections may be used to compensate MANAGEMENT SERVICES for services rendered
prior to the termination of this Agreement, (b) MANAGEMENT SERVICES shall not be
entitled to collect accounts receivable after the termination date of this
Agreement is terminated pursuant to Section 5.2(a), and (c) the MANAGEMENT
SERVICES shall deduct for such cash collections any other amounts owed to
MANAGEMENT SERVICES under this Agreement, including, without limitation, any
reasonable costs incurred by MANAGEMENT SERVICES in carrying out the
post-termination procedures and transactions contemplated herein. MANAGEMENT
SERVICES shall remit remaining amounts from such collection activities, if any,
to the PC. Upon the expiration or termination of this Agreement for any reason
or cause whatsoever, MANAGEMENT SERVICES shall surrender to the PC all books and
records pertaining to the PC's Patient medical records and PC Records (as
defined in Section 7.2).

                            VI. RESTRICTIVE COVENANTS

         6.1.     Covenant Regarding Proprietary Information. In the course of
the relationship created pursuant to this Agreement, the PC will have access to
certain methods, trade secrets, processes, ideas, systems, procedures,
inventions, discoveries, concepts, software in various stages of development,
designs, drawings, specifications, models, data, documents, diagrams, flow
charts, research, economic and financial analysis, developments, procedures,
know-how, policy manuals, financial data, form contracts, marketing ad other
techniques, plans, materials, forms, copyrightable materials and trade
information regarding the operations of MANAGEMENT SERVICES and/or of its
Affiliates (collectively, the "Protected Parties"). The foregoing, together with
the existence and terms of this Agreement, are referred to in this Agreement as
"Proprietary Information". The PC shall maintain all such Proprietary
Information in strict secrecy and shall not divulge such information to any
third parties, except as may be necessary for the discharge of its obligations
under this Agreement. The PC shall take all necessary and proper precautions
against disclosure of any Proprietary Information to unauthorized persons by any
of its officers, directors, employees or agents. All officers, directors,
employees and agents of the PC who will have access to all or any part of the
Proprietary Information may be required to execute an agreement, at the
reasonable request of MANAGEMENT SERVICES, valid under the law of the
jurisdiction in which such agreement is executed, and in a form acceptable to
MANAGEMENT SERVICES and its counsel, committing themselves to maintain the
Proprietary Information in strict confidence and not to disclose it to any
unauthorized person or entity. The Protected Parties not party to this Agreement
are hereby specifically made third party beneficiaries

                                     - 13 -
<PAGE>

of this Section 6.1, with the power to enforce the provisions hereof. Upon
termination of this Agreement for any reason, the PC and each of its Employed
Providers and Contracting Providers shall cease all use of any of the
Proprietary Information and, at the request of MANAGEMENT SERVICES, shall
execute such documents as may be necessary to evidence the PC's abandonment of
any claim thereto. The parties recognize that a breach of this Section 6.1
cannot be adequately compensated in money damages and therefore agree that
injunctive relief shall be available to the Protected Parties as their
respective interests may appear.

         The obligations of the PC under this Section 6.1 shall not apply to
information: (i) which is a matter of public knowledge on or becomes a matter of
public knowledge after the Effective Date of this Agreement, other than as a
breach of the confidentiality terms of this Agreement or as a breach of the
confidentiality terms of any other agreement between the PC and MANAGEMENT
SERVICES or its Affiliates; or (ii) was lawfully obtained by the PC on a
nonconfidential basis other than in the course of performance under this
Agreement and from some entity other than MANAGEMENT SERVICES or its Affiliates
or from some person other than one employed or engaged by MANAGEMENT SERVICES or
its Affiliates, which entity or person has no obligation of confidentiality to
MANAGEMENT SERVICES or its Affiliates.

         6.2.     Covenants Not to Compete During the Term. The parties
recognize that the services to be provided by MANAGEMENT SERVICES shall be
feasible only if the PC operates an active medical practice to which the PC and
Employed Providers devote full time and attention. To that end:

                  (a)      Restrictive Covenants by the PC. During the term of
this Agreement, the PC shall not establish, operate or provide physician or
other health care services at any medical office, clinic or other health care
facility providing services substantially similar to those provided by the PC
pursuant to this Agreement anywhere other than at the Offices and as may be
approved in writing by MANAGEMENT SERVICES. The PC shall also not enter into any
management or administrative services agreement or arrangement with any person
or entity other than MANAGEMENT SERVICES without MANAGEMENT SERVICES' prior
written approval.

                  (b)      Restrictive Covenants by Employed Providers. All
employment contracts between the PC and its Employed Providers shall name
MANAGEMENT SERVICES as a third-party beneficiary to the contract and shall not
be revised without the prior written consent of MANAGEMENT SERVICES. The
contracts shall include noncompetition agreements with its Employed Providers
who are physicians, the substance and form of which is set forth as Exhibit A
hereto, and which the PC will enforce.

         6.3.     Covenant Not to Compete Following Termination. For three (3)
years following the termination of this Agreement by MANAGEMENT SERVICES
pursuant to Section 5.2, the PC shall not enter into any management or
administrative services agreement or any similar arrangement with any person or
entity for the provision of the same or similar services as MANAGEMENT SERVICES
provides to the PC under this Agreement.

                                     - 14 -
<PAGE>

         6.4.     Covenant Not to Solicit. During the term of this Agreement and
for three (3) years following the termination of this Agreement, the PC shall
not:

                  (a)      Directly or indirectly solicit, recruit or hire, or
induce any party to solicit, recruit or hire any person who is an employee of,
or who has entered into an independent contractor arrangement with, MANAGEMENT
SERVICES or any Affiliate of MANAGEMENT SERVICES (excluding any person who
performs patient services);

                  (b)      Directly or indirectly, whether for itself or for any
other person or entity, call upon, solicit, divert or take away, or attempt to
solicit, call upon, divert or take away any of MANAGEMENT SERVICES' customers,
business, or clients; or

                  (c)      Disrupt, damage, impair or interfere with the
business of MANAGEMENT SERVICES.

         6.5.     Enforcement. MANAGEMENT SERVICES and the PC acknowledge and
agree that since a remedy at law for any breach or attempted breach of the
provisions of this Article VI or of Article VII shall be inadequate, either
party shall be entitled to specific performance and injunctive or other
equitable relief in case of any such breach or attempted breach, in addition to
whatever other remedies may exist by law. All parties hereto also waive any
requirement for the securing or posting of any bond in connection with the
obtaining of any such injunctive or other equitable relief. If any provision of
Article VI or Article VII relating to the restrictive period, scope of activity
restricted and/or other provisions described therein shall be declared by a
court of competent jurisdiction to exceed the maximum time period, scope of
activity restricted or geographical area such court deems reasonable and
enforceable under applicable law, the time period, scope of activity restricted
and/or area of restriction held reasonable and enforceable by the court shall
thereafter be the restrictive period, scope of activity restricted and/or the
territory applicable to the restrictive covenant provisions in this Article VI
or Article VII. The invalidity or non-enforceability of this Article VI or
Article VII in any respect shall not affect the validity or enforceability of
the remainder of this Article VI or Article VII or of any other provisions of
this Agreement.

                          VII. INFORMATION AND RECORDS

         7.1.     Ownership of Records. At all times during and after the term
of this Agreement, including any extensions or renewals hereof, all business
records, including but not limited to, business agreements, books of account,
general administrative records and all information generated under or contained
in the management information system pertaining to MANAGEMENT SERVICES'
obligations hereunder, and other business information of any kind or nature,
except for Patient medical records and the PC's Records (as defined in Section
7.2), shall be and remain the sole property of MANAGEMENT SERVICES; provided
that after termination of this Agreement the PC shall be entitled to reasonable
access to such records and information, including the right to obtain copies
thereof, for any purpose related to patient care or the defense of any claim
relating to patient care or the business of MANAGEMENT SERVICES or the PC.

                                     - 15 -
<PAGE>

         7.2.     The PC's Business and Financial Records. At all times during
and after the term of this Agreement, the financial, corporate and personnel
records and information relating exclusively to the business and activities of
the PC, as distinguished from the business and activity of MANAGEMENT SERVICES,
hereinafter referred to as "the PC's Records," shall be and remain the sole
property of the PC.

         7.3.     Access to Records. Each party shall be entitled, upon request
and with reasonable advance notice, to obtain access to all records of the other
party directly related to the performance of such party's obligations pursuant
to this Agreement; provided, however, that such right shall not allow for access
to records that must necessarily be kept confidential. Either party, at its
expense, shall have the right to make copies of any records to which it has
access pursuant to this Section.

         7.4.     Confidentiality of Records. MANAGEMENT SERVICES and the PC
shall adopt procedures for maintaining the confidentiality of the records
relating to the operations of MANAGEMENT SERVICES and the PC which do not
constitute Proprietary Information, which information is not otherwise available
to third parties publicly or by law, and shall comply with all applicable
federal and state statutes and regulations relating to such records. Patient
medical records and other privileged Patient information shall not be disclosed
or utilized by the PC or MANAGEMENT SERVICES or their agents or employees except
as required or permitted by applicable laws and regulations.

                               VIII. MISCELLANEOUS

         8.1.     Independent Contractor Status of Parties. In the performance
of the work, duties and obligations under this Agreement, it is mutually
understood and agreed that each party is at all times acting and performing as
an independent contractor with respect to the other and that no relationship of
partnership joint venture or employment is created by this Agreement. Neither
party, nor any other person performing services on behalf of such party pursuant
to this Agreement, shall have any right or claim against the other party for
Social Security benefits, workers' compensation benefits, disability benefits,
unemployment insurance benefits, health benefits, vacation pay, sick leave or
any other employee benefits of any kind.

         8.2.     No Waiver. The waiver by any party to this Agreement of any
breach of any term or condition of this Agreement shall not constitute a waiver
of subsequent breaches. No waiver by any party of any provision of this
Agreement shall be deemed to constitute a waiver of any other provision.

         8.3.     Notices. If, at any time after the execution of this
Agreement, it shall become necessary or convenient for one of the parties to
serve any notice, demand or communication upon the other party, such notice,
demand, or communication shall be in writing and shall be served personally, by
nationally recognized overnight courier which provides confirmation of delivery,
or by depositing the same in the United States mail, registered or certified,
return receipt requested, postage prepaid and to such address as either party
may have furnished to the other party in writing as the place for the service of
notice. Any notice so mailed shall be deemed to have been given three (3) days
after

                                     - 16 -
<PAGE>

the same has been deposited in the United States mail; when delivered if the
same has been given personally; or the next business day if the same has been
delivered to a nationally recognized overnight courier service.

         8.4.     Assignment. Neither party may sell, transfer, assign, or
otherwise convey its rights or obligations under this Agreement without the
prior written consent of the other, which consent shall not be unreasonably
withheld. Notwithstanding the foregoing, MANAGEMENT SERVICES shall have the
right to (a) assign its rights and/or delegate all or any of its obligations to
any of its Affiliates; and/or (b) subcontract some portion of its obligations
hereunder to a third party which is not an Affiliate of MANAGEMENT SERVICES, in
each case without the consent of the PC.

         8.5.     Successors and Assigns. Subject to the provisions of this
Agreement respecting assignment, the terms, covenants and conditions contained
herein shall be binding upon and inure to the benefit of the successors and
permitted assigns of the parties hereto.

         8.6.     Severability. Nothing contained in this Agreement shall be
construed to require the commission of an act contrary to law, and whenever
there is any conflict between any provision of this Agreement and any statute,
law, ordinance or regulation, the latter shall prevail. In such event, and in
any case in which any provision of this Agreement is determined to be in
violation of a statute, law, ordinance or regulation, the affected provision(s)
shall be limited only to the extent necessary to bring it within the
requirements of the law and, insofar as possible under the circumstances, to
carry out the purposes of this Agreement. The other provisions of this Agreement
shall remain in full force and effect, and the invalidity or unenforceability of
any provision hereof shall not affect the validity and enforceability of the
other provisions of this Agreement, nor the availability of all remedies in law
or equity to the parties with respect to such other provisions.

         8.7.     Third Parties. Except as provided in Article VII, nothing in
this Agreement shall be construed to create any duty to, any standard of care
with reference to or any liability to anyone not a party to this Agreement.

         8.8.     Headings. The headings used in this Agreement are for
convenience of reference only and shall have no force or effect in the
construction or interpretation of the provisions of this Agreement.

         8.9.     Time of the Essence. Time is of the very essence of each and
all of the agreements, covenants and conditions of this Agreement.

         8.10.    Governing Law. This Agreement shall be deemed made, executed
and entered into and shall be governed by and construed in accordance with the
internal laws of the State of Florida.

         8.11.    Language Construction. The language in all parts of this
Agreement shall be construed, in all cases, according to its fair meaning, and
not for or against either

                                     - 17 -
<PAGE>

party hereto. The parties acknowledge that each party and its counsel have
reviewed and revised this Agreement and that the normal rule of construction to
the effect that any ambiguities are to be resolved against the drafting party
shall not be employed in the interpretation of this Agreement.

         8.12.    Indemnification. The PC shall indemnify, hold harmless and
defend MANAGEMENT SERVICES, its officers, directors, shareholders, employees,
agents and independent contractors (the "MANAGEMENT SERVICES Group") from and
against any and all liabilities, losses, damages, claims, causes of action, and
expenses (including reasonable attorneys' fees and disbursements (a "MANAGEMENT
SERVICES Loss")), caused or asserted to have been caused, directly or
indirectly, by or as a result of the performance of medical services or any
other acts or omissions by MANAGEMENT SERVICES and/or its partners, agents,
employees and/or subcontractors (other than MANAGEMENT SERVICES) during the term
hereof except with respect to any MANAGEMENT SERVICES Loss which is the result
of any gross negligence or willful misconduct by a member of the MANAGEMENT
SERVICES Group. MANAGEMENT SERVICES shall indemnify, hold harmless and defend
the PC, its officers, directors, partners, employees, agents and independent
contractors (the "the PC Group") from and against any and all liabilities,
losses, damages, claims, causes of action, and expenses (including reasonable
judgment attorneys' fees and disbursements) (a "the PC Loss"), caused or
asserted to have been caused, directly or indirectly, by or as a result of the
performance of any acts or omissions by MANAGEMENT SERVICES and/or its
shareholders, agents, employees and/or subcontractors during the term hereof
except with respect to any the PC Loss which is the result of any gross
negligence or willful misconduct by a member of the PC Group.

         8.13.    Entire Agreement. This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all prior and contemporaneous agreements, understandings,
negotiations and discussions, whether written or oral, between or among parties
regarding the subject matter of this Agreement.

         8.14.    Incorporation by Reference. All exhibits and other attachments
to this Agreement are incorporated by reference into this Agreement by such
reference.

         8.15.    Amendments Only in Writing. This Agreement may not be amended
or modified in any respect whatsoever, except by an instrument in writing signed
by the parties hereto.

         8.16.    Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be considered an original and all of which
shall constitute one and the same agreement. This Agreement shall not become
effective until it has been executed by all of the parties hereto.

         8.17.    Commercial Impracticability. No party to this Agreement shall
be liable for any failure to perform its obligations hereunder where such
failure results from any cause beyond that party's reasonable control,
including, for example, an act of God, labor

                                     - 18 -
<PAGE>

disturbance such as a strike or walkout, war, riot, fire, storm, accident,
government regulation or interference, or mechanical, electronic or
communications failure.

         8.18.    Election of Remedies. The respective rights of the parties to
this Agreement shall be cumulative. Each party shall have all other rights and
remedies consistent with this Agreement as law and equity may provide. No
exercise by any party of one right or remedy shall be deemed to be an exclusive
election of rights or remedies.

         8.19.    Survival. The provisions of Articles III, IV, V, VI, VII and
VIII shall survive any termination of this Agreement.

         8.20.    Third Party Beneficiaries. Except with respect to Affiliates
of MANAGEMENT SERVICES, nothing in this Agreement shall be construed to create
any duty to, any standard of care with reference to, or any liability to any
Person not a party to this Agreement. The Affiliates of MANAGEMENT SERVICES are
intended third party beneficiaries of this Agreement.

         8.21     Affiliate. An "Affiliate" of an entity means (i) any person or
entity directly or indirectly controlled by such entity; (ii) any person or
entity directly or indirectly controlling such entity; (iii) any subsidiary of
such entity if the entity has a fifty percent (50%) or greater ownership
interest in the subsidiary; or (iv) such entity's parent entity if the parent
has a fifty percent (50%) or greater ownership interest in the entity. For
purposes of this Agreement, the PC is not an Affiliate of MANAGEMENT SERVICES.

         IN WITNESS WHEREOF, MANAGEMENT SERVICES and the PC have caused this
Agreement to be executed by their duly authorized respective officers as of the
Effective Date.

Signed and sealed in
the presence of:

/s/ G DAVID SCHIERING                              NEVADA RADIATION THERAPY
----------------------------------                 MANAGEMENT SERVICES, INC.
Printed name: G DAVID SCHIERING
(witness 1)

                                                   By: /s/ Daniel E. Dosoretz
                                                       -------------------------
/s/ HERBERT ORT                                        Daniel E. Dosoretz, M.D.
----------------------------------                     President
Printed name: HERBERT ORT
(witness 2)

                                     - 19 -
<PAGE>

                                        MICHAEL J. KATIN M.D., PROF.
/s/ G DAVID SCHIERING                   CORP.
---------------------------
(witness 1)

                                        By: /s/ Michael J. Katin
                                            -----------------------------------
/s/ HERBERT ORT                             Michael J. Katin, M.D.
---------------------------                 President
(witness 2)

STATE OF FLORIDA        )
                        )
COUNTY OF LEE           )

         The foregoing instrument was acknowledged before me this 13th day of
April, 1999 by Daniel E. Dosoretz, M.D., the President of Nevada Radiation
Therapy Management Services, Inc., a Nevada corporation organized under the laws
of the State of Nevada, on behalf of the corporation.

                 MARIA MARGARITA SUAREZ
STATE OF FLORIDA  My Comm Exp. 2/26/00  Signature: /s/ MARIA MARGARITA SUAREZ
 NOTARY PUBLIC    Bonded By Service Ins            -----------------------------
                     No. CC535363

                                        Printed name: /s/ MARIA MARGARITA SUAREZ
                                                      --------------------------
                                        Notary Public

STATE OF FLORIDA       )
                       )
COUNTY OF LEE          )

         The foregoing instrument was acknowledged before me this ____ day of
April, 1999 by Michael J. Katin, M.D., the President of Michael J. Katin, M.D.,
Prof. Corp., a Nevada professional corporation organized under the laws of the
State of Nevada, on behalf of the corporation.

                 MARIA MARGARITA SUAREZ
STATE OF FLORIDA  My Comm Exp. 2/26/00  Signature: /s/ MARIA MARGARITA SUAREZ
 NOTARY PUBLIC    Bonded By Service Ins            -----------------------------
                     No. CC535363

                                        Printed name: /s/ MARIA MARGARITA SUAREZ
                                                      --------------------------
                                        Notary Public

                                     - 20 -
<PAGE>

                                    EXHIBIT A

                            NONCOMPETITION AGREEMENT

                   NON-COMPETITIVE AND RESTRICTIVE AGREEMENTS.

                  A.       During the term of this Agreement and any renewal
period, Physician shall not undertake any professional service except as
directed and authorized by [Employer] and shall not engage in any profession
other than the rendition of the professional services as directed by [Employer].

                  B.       In the event of the termination of this Agreement for
any reason, Physician agrees not to directly or indirectly engage in the
practice of radiation therapy or oncology, or otherwise compete with [Employer],
or any of its physician providers, by practicing as a radiation therapist or
oncologist (i) at any hospital in which physician providers of [Employer]
regularly admit patients, or (ii) within any county in which [Employer] or any
of its Affiliates operate an Office, for a period of two (2) years after the
date of such actual termination of this Agreement. The purpose of this covenant
is to protect [Employer] from the irreparable harm it will suffer if Physician
competes with [Employer] after having been introduced to [Employer]'s personnel
and patients and after learning special medical procedures used by [Employer]'s
physician providers, [Employer]'s business procedures, office and practice
policies, and the special and confidential professional procedures developed by
[Employer].

                  C.       The parties agree that in the event of any breach or
attempted breach of any of the covenants set out in section B (the "Covenant Not
to Compete"), [Employer] will be entitled to equitable relief by way of
injunction or otherwise, in addition to any remedy at law which may be
available. The parties agree that any violation or threatened violation by
Physician of the Covenant Not to Compete will cause [Employer] to suffer
irreparable harm. The parties agree that [Employer]'s remedy of an injunction is
not the exclusive remedy for breach of the Covenant Not to Compete and that a
court may grant such additional relief as is reasonable.

                  D.       In the event Physician breaches the Covenant Not to
Compete, in addition to the injunctive relief to which [Employer] shall be
entitled under the law, Physician shall immediately repay to [Employer] any
amounts paid by [Employer] pursuant to section 3.B hereof after the termination
of this Agreement, and all severance or termination pay, if any, paid pursuant
to this Agreement. [Employer] may offset against any amounts owed Physician
pursuant to this Agreement any amounts Physician owes [Employer] pursuant to
paragraph E below for breach of the Covenant Not to Compete.

                  E.       In addition to the injunctive relief to which
[Employer] is entitled under the law and in addition to the payments provided
for in paragraph D above and in order to compensate [Employer] for the damages
it will incur in recruiting and compensating a replacement radiation oncologist
and for the lost business it will suffer, in the event of a breach by Physician
of the Covenant Not to Compete, Physician

                                     - 21 -
<PAGE>

shall also pay to [Employer], as liquidated damages, a sum equal to a percentage
of the gross billings of [Employer] for the twelve month period immediately
preceding the termination of this Agreement. The percentage shall be that formed
by dividing the number one by the number equal to the total number of physician
providers of [Employer], including Physician, on the date of termination of this
Agreement. The parties agree that, in the event of the breach by Physician of
the Covenant Not to Compete, the actual amount of damages which would be
incurred by [Employer] would be difficult to ascertain and prove, and that
therefore the liquidated damages sum set forth herein would be reasonable and
appropriate.

                  F.       In the event the Covenant Not to Compete shall be
determined by a court of competent jurisdiction to be unenforceable by reason of
its geographic or temporal restrictions being too great, or by reason that the
range of activities covered is too great, or for any other reason, section B
shall be interpreted to extend over the maximum geographic area, period of time,
range of activities or other restrictions as to which it may be enforceable.

                                     - 22 -
<PAGE>

                 ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                    "Nevada"

         This Addendum (the "Addendum") is entered into as of January 1, 1999,
by and among NEVADA RADIATION THERAPY MANAGEMENT SERVICES, INCORPORATED, a
Nevada corporation ("MANAGEMENT SERVICES") and MICHAEL J. KATIN, M.D., PROF.
CORP., a Nevada professional corporation (the "PC"). This Addendum amends
Section 3.1 of the Administrative Services Agreement, dated January 9, 1998,
between the parties (the "Agreement").

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1.     Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PC shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $121,400. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

Accepted:                               NEVADA RADIATION THERAPY MANAGEMENT
                                        SERVICES, INCORPORATED

                                        By: /s/ Daniel E. Dosoretz
                                            ------------------------------------
                                            Daniel E. Dosoretz, M.D.
                                            President

Accepted:                               MICHAEL J. KATIN, M.D., PROF. CORP.

                                        By: /s/ Michael J. Katin
                                            ------------------------------------
                                            Michael J. Katin, M.D.
                                            President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                    "Nevada"

         This Addendum (the "Addendum") is entered into as of January 1, 2000,
by and among NEVADA RADIATION THERAPY MANAGEMENT SERVICES, INCORPORATED, a
Nevada corporation ("MANAGEMENT SERVICES") and MICHAEL J. KATIN, M.D., PROF.
CORP., a Nevada professional corporation (the "PC"). This Addendum amends
Section 3.1 of the Administrative Services Agreement, dated January 9, 1998,
between the parties (the "Agreement") and replaces the Addendum of that same
Section dated January 1, 1999.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1.     Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PC shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $220,833. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

Accepted:                               NEVADA RADIATION THERAPY MANAGEMENT
                                        SERVICES, INCORPORATED

                                        By: /s/ Daniel E. Dosoretz
                                            ------------------------------------
                                            Daniel E. Dosoretz, M.D.
                                            President

Accepted:                               MICHAEL J. KATIN, M.D., PROF. CORP.

                                        By: /s/ Michael J. Katin
                                            ------------------------------------
                                            Michael J. Katin, M.D.
                                            President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                    "Nevada"

         This Addendum (the "Addendum") is entered into as of January 1, 2001,
by and among NEVADA RADIATION THERAPY MANAGEMENT SERVICES, INC., a Nevada
corporation ("MANAGEMENT SERVICES") and MICHAEL J. KATIN, M.D., PROF. CORP., a
Nevada professional corporation (the "PC"). This Addendum amends Section 3.1 of
the Administrative Services Agreement dated January 9, 1998 between the parties
(the "Agreement") and replaces the Addendum of that same Section dated January
1, 2000.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1.     Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PC shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $266,666.67. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

Accepted:                                   NEVADA RADIATION THERAPY
                                            MANAGEMENT SERVICES, INC.

                                            By: /s/ David Koeninger
                                                --------------------------------
                                                David Koeninger
                                                Chief Financial Officer

Accepted:                                   MICHAEL J. KATIN, M.D., PROF. CORP.

                                            By: /s/ Michael J. Katin
                                                --------------------------------
                                                Michael J. Katin, M.D.
                                                President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                    "Nevada"

         This Addendum (the "Addendum") is entered into as of January 1, 2002,
by and among NEVADA RADIATION THERAPY MANAGEMENT SERVICES, INC., a Nevada
corporation ("MANAGEMENT SERVICES") and MICHAEL J. KATIN, M.D., PROF. CORP., a
Nevada professional corporation (the "PC"). This Addendum amends Section 3.1 of
the Administrative Services Agreement dated January 9, 1998 between the parties
(the "Agreement") and replaces the Addendum of that same Section dated January
1, 2001.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1.     Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PC shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $310,000.00. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

Accepted:                                   NEVADA RADIATION THERAPY
                                            MANAGEMENT SERVICES, INC.

                                            By: /s/ David Koeninger
                                                --------------------------------
                                                David Koeninger
                                                Chief Financial Officer

Accepted:                                   MICHAEL J. KATIN, M.D., PROF. CORP.

                                            By:
                                                --------------------------------
                                                Michael J. Katin, M.D.
                                                President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                    "Nevada"

         This Addendum (the "Addendum") is entered into as of January 1, 2003,
by and among NEVADA RADIATION THERAPY MANAGEMENT SERVICES, INC., a Nevada
corporation ("MANAGEMENT SERVICES") and MICHAEL J. KATIN, M.D., PROF. CORP., a
Nevada professional corporation (the "PC"). This Addendum amends Section 3.1 of
the Administrative Services Agreement dated January 9, 1998 between the parties
(the "Agreement") and replaces the Addendum of that same Section dated January
1, 2002.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1.     Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PC shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $315,000.00. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

Accepted:                                   NEVADA RADIATION THERAPY
                                            MANAGEMENT SERVICES, INC.

                                            By: /s/ David Koeninger
                                                --------------------------------
                                                David Koeninger
                                                Chief Financial Officer

Accepted:                                   MICHAEL J. KATIN, M.D., PROF. CORP.

                                            By: /s/ Michael J. Katin
                                                --------------------------------
                                                Michael J. Katin, M.D.
                                                President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT

         This Addendum (the "Addendum") is entered into as of January 1, 2004,
by and between NEVADA RADIATION THERAPY MANAGEMENT SERVICES, INC., a Nevada
corporation ("MANAGEMENT SERVICES") and MICHAEL J. KATIN, M.D., PROF. CORP, a
Nevada professional corporation (the "PA"). This Addendum amends Section 3.1 of
the Administrative Services Agreement dated January 1, 2002 between the parties
(the "Agreement") and replaces the Addendum of that same Section dated January
1, 2003.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1.     Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PC shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $450,000.00. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

                           Accepted:        NEVADA RADIATION THERAPY
                                            MANAGEMENT SERVICES, INC.

                                            By: /s/ David Koeninger
                                                --------------------------------
                                                David Koeninger
                                                Vice President and CFO

                           Accepted:        MICHAEL J. KATIN, M.D., PROF. CORP.

                                            By: /s/ Daniel E. Dosoretz
                                                --------------------------------
                                                Daniel E. Dosoretz, M.D.
                                                Vice President<PAGE>

                                                                   EXHIBIT 10.18

                        ADMINISTRATIVE SERVICES AGREEMENT
                                   "Maryland"

         This Administrative Services Agreement ("Agreement") is entered into as
of October 31, 1998 ("Effective Date") by and among MARYLAND RADIATION THERAPY
MANAGEMENT SERVICES, INC., a Maryland corporation ("MANAGEMENT SERVICES") and
KATIN RADIATION THERAPY, P.A., a Maryland professional corporation (the "PC").

                                    RECITALS

         A.       The PC is a Maryland professional corporation that engages in
the business of providing or arranging for the provision of health care services
(the "Practice"). The PC has entered into and throughout the term of this
Agreement may (if MANAGEMENT SERVICES does not do so itself as provided herein)
continue to enter into arrangements with insurers, HMOs and other third-party
payors ("Payors") to provide or arrange for the provision of health care
services to persons covered by those Payors ("Enrollees").

         B.       The PC has entered into written employment agreements with
physicians and other health care providers and health care professionals
("Employed Providers") licensed to practice in the State of Maryland. The PC may
also enter into independent contractor agreements with various physicians and
other health care providers and health care professionals ("Contracting
Providers") to assist the PC in providing or arranging for the provision of
health care services to Enrollees and other patients of the PC (collectively,
"Patients").

         C.       MANAGEMENT SERVICES engages in the business of providing
certain administrative and support services concerning the day-to-day affairs of
radiation therapy office (the "Offices"), both in their startup and established
phases, and in providing space in the Offices, equipment, furnishings, supplies,
inventory, personnel and working capital to Offices and facilities management in
connection therewith.

         D.       The PC desires to secure certain administrative services from
MANAGEMENT SERVICES in connection with its operation of the Practice in the
Offices, and to lease from MANAGEMENT SERVICES certain space, equipment,
furnishings, supplies and inventory in connection therewith.

         E.       The PC and MANAGEMENT SERVICES desire to enter into a written
agreement for the provision by MANAGEMENT SERVICES, on an exclusive basis, of
administrative services to the PC with respect to the Practice, and for the
provision of space, furnishings, supplies, inventory, non-medical personnel and
management services to the Practice, so as to permit the PC to devote its
efforts on a concentrated and continuous basis to the rendering of medical
services to its Patients.

         NOW, THEREFORE, in consideration of the mutual covenants and conditions
contained herein, the parties agree as follows:

<PAGE>

                          I. RESPONSIBILITIES OF THE PC

         1.1.     Sole Responsibility for All Medical and Professional Matters.
All medical and professional matters relating to the provision of radiation
therapy or oncology services at the Offices shall be the sole responsibility of
the PC. The PC shall use and occupy the facilities provided by MANAGEMENT
SERVICES hereunder exclusively for the practice of medicine. The PC expressly
acknowledges that the medical practice or practices conducted at these
facilities shall be conducted solely by Employed Providers and Contracting
Providers.

         1.2.     Employed Providers and Contracting Providers. The PC shall
have complete control of and responsibility for the hiring, engagement,
compensation, supervision evaluation, and termination of all Employed Providers
and Contracting Providers, including nurses, physician assistants and other
licensed healthcare professionals. With respect to physicians, the PC shall only
employ and contract with licensed physicians meeting applicable credentialing
guidelines established by the PC. The PC shall be responsible for the payment of
salaries and wages, compensation, payroll taxes, employee benefits, and all
other taxes and charges now or hereafter applicable to Employed Providers and
Contracting Providers. Prior to making any changes with respect to any of the
Employed Providers or Contracting Providers, the PC shall consult with
MANAGEMENT SERVICES, although MANAGEMENT SERVICES shall provide input only and
shall not conclude whether an Employed Provider should be hired or terminated.
The PC shall also consult with MANAGEMENT SERVICES with regard to the terms of
contracts entered into between the PC and Employed Providers and Contracting
Providers and the terms and conditions of their employment or engagement as
independent contractors, as applicable.

         1.3.     Fees, Charges and Payor Agreements. The PC shall, after
consultation with MANAGEMENT SERVICES, determine the fees, charges, premiums, or
other amounts due in connection with its delivery of health care services to
Patients. Such fees, charges, premiums, or other amounts, regardless of whether
determined on a fee-for-service, capitated, prepaid, or other basis, shall be
reasonable and consistent with the fees, charges, premiums and other amounts due
to health care providers for similar services within the community under the
type of reimbursement program involved. MANAGEMENT SERVICES shall provide input
relating to the foregoing but shall not conclude the level of fees, charges,
premiums, or other amounts the PC should establish.

         1.4.     Compliance with Law. The PC shall require all of its Employed
Providers and Contracting Providers to comply with all laws, regulations, and
ethical and professional standards applicable to the practice of medicine.
Employed Providers and Contracting Providers who are physicians shall at all
times be licensed to practice medicine in the State of Maryland and all other
states in which an Office at which such physician provides patients medical
services is located.

                                      - 2 -
<PAGE>
         1.5.     Offices; Hours of Operation; Staffing. The PC shall conduct
the Practice from the current Office located in Maryland
at________________________________________, as well as such hospitals and other
facilities as may be agreed upon by MANAGEMENT SERVICES and the PC from time to
time. Any additional or substitute Office shall be deemed to be part of the
Practice for the purposes of this Agreement. The hours of operation and the
medical staffing of the Offices shall be established by the agreement of the PC
and MANAGEMENT SERVICES from time to time hereafter.

         1.6.     Quality Assurance. The PC shall rigorously monitor utilization
and quality of services provided by Employed Providers and Contracting
Providers, shall develop, maintain and administer quality assurance programs and
performance standards and shall take all steps necessary to remedy any and all
deficiencies in the efficiency or the quality of medical care provided.

         1.7.     Patient Referrals. The parties agree that the benefits to the
PC hereunder do not require, are not payment for, and are not in any way
contingent upon the admission, referral or any other arrangements for the
provision of any item or service offered by MANAGEMENT SERVICES or any
Affiliate, as defined in Section 8.21 of this Agreement, of MANAGEMENT SERVICES
to any of the PC's Patients in any facility or laboratory controlled, managed or
operated by MANAGEMENT SERVICES or any Affiliate of MANAGEMENT SERVICES.

         1.8.     Professional Dues and Education Expenses. The PC and its
Employed Providers and Contracting Providers shall be solely responsible for the
cost of membership in professional associations, and continuing professional
education. The PC shall ensure that each of its Employed Providers and
Contracting Providers participates in such continuing medical education as is
necessary for such provider to remain current with professional licensure and
community standards.

         1.9.     Professional Insurance Eligibility. The PC shall cooperate
with MANAGEMENT SERVICES in the obtaining and retaining of professional
liability insurance by assuring that either its Employed Providers and
Contracting Providers are insurable or instituting proceedings to terminate any
Employed Provider of Contracting Provider who is not insurable or loses his or
her insurance eligibility. Termination shall be effective no more than thirty
(30) days from such determination. The PC shall require all Employed Providers
and Contracting Providers to participate in an on-going risk management program.

         1.10.    Fees for Professional Services. MANAGEMENT SERVICES shall be
solely responsible for legal, accounting and other professional services
incurred by the PC in operating the Practice absent a violation by the PC of any
provisions of this Agreement.

                                      - 3 -
<PAGE>

                   II. RESPONSIBILITIES OF MANAGEMENT SERVICES

         2.1.     General Responsibility. MANAGEMENT SERVICES shall have general
responsibility for providing fiscal services, administrative services, and other
strategic and tactical support services to the PC with respect to the Practice,
except as otherwise provided in this Agreement. MANAGEMENT SERVICES shall
perform all required functions in accordance with sound management techniques.
Notwithstanding MANAGEMENT SERVICES's general and specific rights and
responsibilities set forth in this Agreement, the PC shall have full authority
and control with respect to all medical, professional and ethical determinations
over the PC's Practice to the extent required by federal, state and local laws,
rules and regulations. MANAGEMENT SERVICES shall not engage in activities which
constitute the practice of medicine under applicable laws. MANAGEMENT SERVICES
shall neither exercise control over nor interfere with the physician-patient
relationship, which shall be maintained strictly between the physicians employed
by or contracting with the PC and the PC's Patients.

         2.2.     Responsibilities with Regard to Selected Patient-Related
Matters.

                  (a)      Patient Relations, Scheduling, Etc. MANAGEMENT
SERVICES shall assist the PC in maintaining positive Patient relations by, among
other things, in conjunction with and at the direction of the PC: scheduling
Patient appointments; responding to Patient grievances and complaints in matters
other than medical evaluation, diagnosis, and treatment; and establishing and
maintaining in the PC's name and on its behalf Patient transfer arrangements to
expedite referrals where medically necessary, as determined and requested by the
attending physician.

                  (b)      Recordkeeping. MANAGEMENT SERVICES shall assist the
PC in maintaining Patient medical records in accordance with applicable laws
concerning their confidentiality and retention, and promptly making such records
available to the PC's Employed Providers, Contracting Providers and other
appropriate recipients. Notwithstanding the foregoing sentence, Patient medical
records shall be and shall remain the property of the PC, and the content
thereof shall be solely the responsibility of the PC.

                  (c)      Quality Assurance.

                           (i)      In General. MANAGEMENT SERVICES shall assist
the PC, in accordance with criteria established by the PC, in the development
and implementation of appropriate quality assurance programs, including
development of performance and utilization standards, sampling techniques for
case review, and preparation of appropriately documented studies.
Notwithstanding the foregoing, MANAGEMENT SERVICES shall not perform any duties
that constitute the corporate practice of medicine in Maryland and all other
states in which an Office at which the PC provides patient medical services is
located.

                           (ii)     Periodic Independent Review. On behalf of
the PC.

                                      - 4 -
<PAGE>

MANAGEMENT SERVICES may periodically perform quality assurance and utilization
reviews through nurses employed by it; provided, however, that MANAGEMENT
SERVICES shall not engage in activities which constitute the practice of
medicine under applicable law. Alternatively, MANAGEMENT SERVICES may
periodically arrange for an independent quality assurance and utilization review
to be performed by persons who are unrelated to the PC or MANAGEMENT SERVICES,
or to any Affiliate of the PC or MANAGEMENT SERVICES, which has expertise in
such areas, and which has been approved in advance by the PC. Such review shall
include a random sampling of medical records (consistent with laws regarding the
confidentiality of medical records), an analysis of the PC's quality assurance
utilization review procedures, and an analysis of the appropriateness of costs
associated with operating the PC's medical practice at the Practice.

         2.3.     Responsibilities with Regard to Selected Financial Matters.

                  (a)      Billing. MANAGEMENT SERVICES shall submit on a timely
basis all bills and necessary documentation required by Patients and Payors in
order to obtain payment in connection with the PC's delivery of health care
services at the Practice or its arrangement for the delivery of such services.
In seeking such payment, MANAGEMENT SERVICES shall act as the PC's exclusive
agent in billing and collecting professional fees, charges and other amounts
owed to the PC. In this connection, the PC hereby appoints MANAGEMENT SERVICES,
during the term of this Agreement, as the PC's true and lawful attorney-in-fact,
with power of substitution, for the following purposes relating to the Practice:

                           (i)      To bill the PC's Patients on the PC's
behalf.

                           (ii)     To collect accounts receivable generated by
such billings on the PC's behalf, including, where deemed appropriate by
MANAGEMENT SERVICES and approved in advance by the PC, settling and compromising
claims, assigning such accounts receivable to a collection agency or the
bringing of legal action against a Patient or Payor on the PC's behalf.

                           (iii)    To receive payments on behalf of the PC from
Patients and Payors, to cause such payments to be deposited into appropriate
depository accounts (each such depository account, a "Collections Account") and
to write checks against or otherwise withdraw such payments to pay the PC
Expenses (as hereinafter defined).

                  (b)      Accounting. MANAGEMENT SERVICES shall direct and
maintain the operation of an appropriate accounting system with respect to the
PC's operation of the Practice which shall perform all bookkeeping and
accounting services required for the operation of the Practice, including the
maintenance, custody and supervision of business records, ledgers and reports;
the establishment, administration and implementation of accounting procedures,
controls and systems. Such accounting system shall allow MANAGEMENT SERVICES to
prepare the reports specified in Section 2.3(c).

                                     - 5 -
<PAGE>

                  (c)      Reporting. MANAGEMENT SERVICES shall present to the
PC reports on the financial condition of the PC on the basis set forth below in
clauses (i) and (ii) and such other reports that the PC may reasonably request,
including daily activity reports, weekly analyses, alternative delivery system
reports, backlog reports and the like. MANAGEMENT SERVICES also shall provide
such reports as may be required by any regulatory agency having jurisdiction
over the operations of the PC.

                  The reports initially required to be delivered to the PC under
this Section 2.3(c) with respect to the Practice are as follows:

                           (i)      As soon as possible after the close of each
month, a balance sheet and a related statement of revenues and expenses showing
the results of the PC's operations for the preceding month of the fiscal year
and the year to date.

                           (ii)     As soon as possible after the close of each
fiscal year, a balance sheet and related statement of revenues and expenses
showing the results of the PC's operations during that fiscal year.

         2.4.     Responsibilities with Respect to Facilities Management.

                  (a)      Office Management Services. MANAGEMENT SERVICES shall
provide, supervise and direct the development of appropriate and efficient
office management services with respect to the PC's operation of the Practice.

                  (b)      Offices. MANAGEMENT SERVICES shall provide, manage
and maintain the real property comprising the Offices and reasonable
improvements during the term of this Agreement. In consultation with the PC,
MANAGEMENT SERVICES shall oversee all management, maintenance and other
decisions pertaining to the Offices consistent with the terms of this Agreement.
MANAGEMENT SERVICES shall maintain the Offices in good condition and repair,
reasonable wear and tear excepted. MANAGEMENT SERVICES shall provide such
additional and/or replacement facilities as the PC and MANAGEMENT SERVICES
agree, from time to time. MANAGEMENT SERVICES shall provide the PC with all
utilities (including water, gas and electricity), heat, air conditioning,
telephone, janitorial services and disposal services (including the disposal of
medical wastes) required in connection with the operation of the Offices.

                  (c)      Use of Assets.

                           (i)      MANAGEMENT SERVICES shall lease or purchase
and, when necessary, replace equipment and furnishings needed for the delivery
of health care services by the PC at the Offices and for the delivery of
services provided by MANAGEMENT SERVICES pursuant to this Agreement. MANAGEMENT
SERVICES shall consult with the PC with respect to the suppliers, prices and
specifications of such equipment and furnishings. MANAGEMENT SERVICES shall use
its best efforts to keep and maintain the equipment and

                                     - 6 -
<PAGE>

furnishings used by the PC at the Offices in good working order and condition.

                           (ii)     All assets provided or purchased under this
Agreement by MANAGEMENT SERVICES, including any management information systems,
shall remain the property of MANAGEMENT SERVICES and the PC shall have the right
to use such assets only during the term of this Agreement.

                           (iii)    Nothing in this Agreement shall be construed
to affect or limit in any way the professional discretion of the PC to select
and use equipment, furnishings, inventory and supplies purchased by MANAGEMENT
SERVICES in accordance with the terms of this Agreement insofar as such
selection or use constitutes or might constitute the practice of medicine.

                  (d)      Supplies and Inventory. MANAGEMENT SERVICES shall
provide and replenish, as necessary and as may be permitted by applicable law,
the inventory and supplies needed for the delivery of medical services by the
PC, and for the delivery of services by MANAGEMENT SERVICES pursuant to this
Agreement. MANAGEMENT SERVICES shall consult with the PC with respect to the
suppliers, prices and specifications of such inventory and supplies.

                  (e)      No Warranties. THE PC ACKNOWLEDGES THAT MANAGEMENT
SERVICES MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED, AS TO THE
SUITABILITY OR ADEQUACY OF ANY FACILITIES, , EQUIPMENT, FURNISHINGS, INVENTORY
OR SUPPLIES PROVIDED PURSUANT TO THIS AGREEMENT FOR THE CONDUCT OF A MEDICAL
PRACTICE OR FOR ANY OTHER PARTICULAR PURPOSE.

         2.5.     Other Responsibilities.

                  (a)      Public Relations. MANAGEMENT SERVICES shall provide
services reasonably necessary for enhancing public relations for the PC's health
care services and shall submit any public relations programs for prior review
and revision, if necessary, and approval by the PC. Such public relations shall
comply with applicable laws and regulations governing the use of promotional
activities by the medical profession and with applicable standards of medical
ethics.

                  (b)      Insurance.

                           (i)      Property and Liability Insurance. MANAGEMENT
SERVICES shall obtain and maintain during the term of this Agreement, if
available on commercially reasonable terms, (a) property damage insurance
protecting the Practice premises and the personal property located therein
against such hazards and in such amounts as MANAGEMENT SERVICES determines are
reasonably prudent; and (b) general liability insurance in such amounts as
MANAGEMENT SERVICES determines are reasonably prudent.

                                     - 7 -
<PAGE>

                           (ii)     General Liability Insurance. The PC shall
obtain and maintain during the term of this Agreement general liability
insurance in such amounts as the PC determines are reasonably prudent. The PC
shall name MANAGEMENT SERVICES as an additional insured on such policies.

                           (iii)    Malpractice Insurance. It is understood that
the PC and its Employed Providers shall, at the PC's cost, at all times be
covered by malpractice insurance with coverage in usual and customary amounts
for practitioners of the same profession and specialties in Maryland and, if
applicable, other states. The PC shall ensure that its written agreements with
Contracting Providers who are physicians require such Contracting Providers to
at all times be covered by malpractice insurance in amounts that are usual and
customary for practitioners of the same profession and specialty in Maryland
and, if applicable, other states. Such malpractice policies shall name
MANAGEMENT SERVICES as an additional insured.

                           (iv)     Copies of Insurance Policies. MANAGEMENT
SERVICES or the PC shall, upon request by the PC or MANAGEMENT SERVICES, as the
case may be, promptly provide the PC or MANAGEMENT SERVICES, as the case may be,
with copies of all policies of insurance that it procures under this Agreement.
Each such policy shall provide that it cannot be modified or terminated except
after thirty (30) days written notice to MANAGEMENT SERVICES.

                  (c)      Personnel. MANAGEMENT SERVICES shall furnish the
services of all personnel other than physicians, nurses, physician assistants or
other licensed healthcare professionals required for the operation of the
Practice. Except as specifically provided in this Section 2.5(c). MANAGEMENT
SERVICES has the power to recruit, hire, train, promote, assign, set the
compensation level for, and discharge all personnel other than physicians,
nurses, physician assistants or other licensed healthcare professionals. Any
personnel employed by MANAGEMENT SERVICES who perform patient care services
shall perform such services under the exclusive direction, supervision and
control of the PC, while all other services of MANAGEMENT SERVICES personnel
shall be performed under the exclusive direction, supervision and control of
MANAGEMENT SERVICES. If the PC is dissatisfied with the services of any
personnel employed by MANAGEMENT SERVICES, the PC shall consult with MANAGEMENT
SERVICES. MANAGEMENT SERVICES shall in good faith determine whether the
performance of that employee could be brought to acceptable levels through
counsel and assistance, or whether, if requested by the PC (provided that such
employee is not an officer or senior manager of MANAGEMENT SERVICES), such
employee should be removed from providing services for the PC. Employee
assignments shall be made with the intention of assuring consistent and
continued rendering of quality services and to ensure prompt availability and
accessibility of personnel to physicians in order to develop constant, familiar
and routine working relationships between the Employed Providers, Contracting
Providers and MANAGEMENT SERVICES personnel.

                  (d)      Employed Providers. MANAGEMENT SERVICES shall assist
the PC

                                     - 8 -
<PAGE>

in the administration of any employee benefit plans established by the PC in
compliance with the provisions of Section 1.10 hereof.

                  (e)      Managed Care Agreements. MANAGEMENT SERVICES shall
negotiate and administer all managed care agreements on behalf of the PC and
shall consult with the PC on all professional and clinical matters relating
thereto.

                           III. FINANCIAL ARRANGEMENTS

         3.1.     Service Fee. For the services to be provided hereunder by
MANAGEMENT SERVICES, the PC shall pay to MANAGEMENT SERVICES a monthly Service
Fee of $124,000. The parties agree that the Service Fee represents the fair
market value of the services provided by MANAGEMENT SERVICES hereunder and that
the parties shall meet annually to reevaluate the value of services provided by
MANAGEMENT SERVICES and shall establish the fair market value thereof for
purposes of this Section 3.1.

         3.2.     Security Agreement: the PC Expenses. To secure the PC's
payment obligations hereunder, the PC is concurrently herewith entering into a
security agreement, in form acceptable to MANAGEMENT SERVICES, to grant to
MANAGEMENT SERVICES a security interest in the accounts receivable of the PC and
all of the PC's rights to receive payments under managed care contracts. The PC
shall cooperate with MANAGEMENT SERVICES and execute all reasonably necessary
documents in connection with the granting of such security interest.

         All payments on behalf of the PC from Patients and Payers shall be
deposited into one or more Collection Accounts. To the extent the PC receives
any such payments, the PC shall direct such payments to MANAGEMENT SERVICES for
deposit in one or more Collection Accounts.

         3.3.     Arbitration. Any controversy or claim arising out of or
relating to this Agreement or the transactions contemplated hereby, including
any controversy or claim arising out of or relating to the parties' decision to
enter into this Agreement or the transactions contemplated hereby, shall be
settled by binding arbitration. Each party shall select an arbitrator who has at
least three (3) years experience in health care or medical practice management
or in health care or medical practice dispute resolution. The arbitration
proceedings shall be confidential and the arbitrators may issue appropriate
protective orders to safeguard each party's confidential information. Such
protective orders shall be enforceable by any court of competent jurisdiction.
Except as specifically provided in this section, the arbitration shall be
conducted in accordance with the rules of conciliation and arbitration of the
American Arbitration Association. The two arbitrators shall agree upon any issue
no later than thirty (30) days after the date the second arbitrator has been
engaged, and shall take into account the principles and objectives set forth in
paragraph (b) below. If the two arbitrators cannot agree on a determination,
then within five (5) days thereafter the two arbitrators shall select a third
arbitrator, who shall have the same qualifications required for the first two
arbitrators. No later than thirty (30) days after the date the third arbitrator
is engaged, he or she shall determine which of the two positions best satisfies

                                     - 9 -
<PAGE>

the provisions of the contract and the intent of the parties, taking into
account the principles and objectives set forth in paragraph (b) below. The
third arbitrator shall have no right to propose a middle ground between the two
or to make any modification of the proposals of either party. The third
arbitrator's determination shall be final and binding on all parties. The cost
and expense of the third arbitrator shall be shared equally between the parties.
If either party fails to engage an arbitrator as required hereunder, the
arbitrator selected by the other party shall conduct the arbitration and make
the final decision in accordance with this Section 3.4.

                  (b)      The arbitration shall be conducted at the offices of
MANAGEMENT SERVICES or such other mutually acceptable site. In conducting the
arbitration, the arbitrator(s) shall consider the following principles and
objectives of the parties in entering into this Agreement:

                           (i)      The parties contemplate that the PC shall
pay MANAGEMENT SERVICES a flat fee for the fair market value of MANAGEMENT
SERVICES' hereunder.

                           (ii)     The parties agree that MANAGEMENT SERVICES
shall in no way provide medical services to Patients.

                           (iii)    The parties contemplate an expansion of the
Practice by acquisition or purchase of other Offices and by expansion of the
variety of specialty medical services provided and/or ancillary services
provided.

                  IV. REPRESENTATIONS AND WARRANTIES; COVENANTS

         4.1.     Representations and Warranties and Covenants of the PC.

                  (a)      The PC hereby represents and warrants to MANAGEMENT
SERVICES as follows:

                           (i)      The PC is and shall remain during the term
of this Agreement a professional corporation duly organized, validly existing
and in good standing under the laws of the State of Maryland, actively engaged
in the practice of medicine, and possessing full corporate power and authority
to own its properties and to conduct the business in which it engages.

                           (ii)     The PC has full corporate power and
authority to execute and deliver this Agreement and to engage in the
transactions and obligations contemplated by this Agreement. Upon its execution,
this Agreement shall constitute a valid and binding obligation of the PC,
enforceable in accordance with its terms, except as limited by applicable
bankruptcy, insolvency, moratorium, or other similar laws affecting generally
the rights of creditors and by principles of equity. The party executing this
Agreement on behalf of the PC is duly authorized to do so.

                                     - 10 -
<PAGE>

                           (iii)    The consummation of the transactions
contemplated by this Agreement will not: result in a breach of the terms,
provisions, or conditions of or constitute a default under the Articles of
Incorporation, By-Laws or other enabling or governing instruments of the PC or
any agreement to which the PC is a party or by which it is bound; or, to the
best knowledge of the PC, constitute a violation of any applicable law or
regulation.

                  (b)      The PC hereby covenants to MANAGEMENT SERVICES that
it shall not, without the prior written consent of MANAGEMENT SERVICES, take any
action to terminate or nullify, or release any Employed Provider from, the terms
of any noncompetition covenant set forth in any employment agreement between the
PC and such Employed Provider.

         4.2.     Covenants and Warranties of MANAGEMENT SERVICES. MANAGEMENT
SERVICES hereby represents and warrants to the PC as follows:

                  (a)      MANAGEMENT SERVICES is and shall remain during the
term of this Agreement a corporation which is duly organized, validly existing
and in good standing under the laws of the State of Maryland, possessing full
corporate power and authority to own its properties and to conduct the business
in which it engages.

                  (b)      MANAGEMENT SERVICES has full corporate power and
authority to execute and deliver this Agreement and to engage in the
transactions and obligations contemplated by this Agreement. Upon its execution,
this Agreement shall constitute a valid and binding obligation of MANAGEMENT
SERVICES, enforceable in accordance with its terms, except as limited by
applicable bankruptcy, insolvency, moratorium, or other similar laws affecting
generally the rights of creditors and by principles of equity. The party
executing this Agreement on behalf of MANAGEMENT SERVICES is duly authorized to
do so.

                  (c)      The consummation of the transactions contemplated by
this Agreement will not: result in any breach of the terms, provisions or
conditions of or constitute a default under the Certificate of Incorporation,
Bylaws or other enabling or governing instruments of MANAGEMENT SERVICES or any
agreement to which MANAGEMENT SERVICES is a party or by which it is bound; or,
to the best knowledge of MANAGEMENT SERVICES, constitute a violation of any
applicable law or regulation.

                             V. TERM AND TERMINATION

         5.1      Initial and Renewal Term. The term of this Agreement will be
for an initial period of twenty-five (25) years after the Effective Date, and
shall be automatically renewed for successive five (5) year periods thereafter
(collectively, the "Term"), provided that neither MANAGEMENT SERVICES nor the PC
shall have given notice of termination of this Agreement at least one hundred
twenty (120) days before the end of the initial term or any renewal term, or
unless otherwise terminated as provided in Section 5.2 of this Agreement.

         5.2      Termination.

                                     - 11 -
<PAGE>

                  (a)      Termination by the PC. The PC may immediately
terminate this Agreement at its discretion, upon written notice as follows:

                           (i)      If MANAGEMENT SERVICES becomes insolvent by
reason of its inability to pay its debts as they mature; is adjudicated bankrupt
or insolvent; files a petition in bankruptcy, reorganization or similar
proceeding under the bankruptcy laws of the United States or shall have such a
petition filed against it which is not discharged within thirty (30) days; has a
receiver or other custodian, permanent or temporary, appointed for its business,
assets or property; makes a general assignment for the benefit of creditors; has
its bank accounts, property or accounts attached; has execution levied against
its business or property; or voluntarily dissolved or liquidates or has a
petition filed for corporate dissolution and such petition is not dismissed with
thirty (30) days;

                           (ii)     If the MANAGEMENT SERVICES fails to comply
with any material provision of this Agreement, or any other agreement with the
PC, and does not correct such failure within sixty (60) days after written
notice of such failure to comply is delivered by the PC specifying the nature of
the breach in reasonable detail.

                  (b)      Termination by MANAGEMENT SERVICES. MANAGEMENT
SERVICES may immediately terminate this Agreement at its discretion, upon
written notice as follows:

                           (i)      If the PC becomes insolvent by reason of its
inability to pay its debts as they mature; is adjudicated bankrupt or insolvent;
files a petition in bankruptcy, reorganization or similar proceeding under the
bankruptcy laws of the United States or shall have such a petition filed against
it which is not discharged within thirty (30) days; has a receiver or other
custodian, permanent or temporary, appointed for its business, assets or
property; makes a general assignment for the benefit of creditors; has its bank
accounts, property or accounts attached; has execution levied against its
business or property; or voluntarily dissolves or liquidates or has a petition
filed for corporate dissolution and such petition is not dismissed with thirty
(30) days; or

                           (ii)     If the PC fails to comply with any material
provision of this Agreement with MANAGEMENT SERVICES, and does not correct such
failure within sixty (60) days after written notice of such failure to comply is
delivered by MANAGEMENT SERVICES specifying the nature of the breach in
reasonable detail.

                  (c)      Termination by Agreement. In the event the PC and
MANAGEMENT SERVICES shall mutually agree in writing, this Agreement may be
terminated on the date specified in such written agreement.

                  (d)      Legislative. Regulatory or Administrative Change. In
the event there shall be a change in the Medicare or Medicaid statutes, federal
statutes, state statutes, case laws,

                                     - 12 -
<PAGE>

administrative interpretations, regulations or general instructions, the
adoption of new federal or state legislation, or a change in any third-party
reimbursement system, any of which are reasonably likely to materially and
adversely affect the manner in which either party may perform or be compensated
for its services under this Agreement or which shall make this Agreement or any
related agreements unlawful or unenforceable, or which would be reasonably
likely to subject either party to this Agreement, or any member, shareholder,
officer, director, employee, agent or affiliated organization to any civil or
criminal penalties or administrative sanctions, the parties shall immediately
use their best efforts to enter into a new service arrangement or basis for
compensation for the services furnished pursuant to this Agreement that complies
with the law, regulation, or policy, or which minimizes the possibility of such
penalties, sanctions or unenforceability, and that approximates as closely as
possible the economic position of the parties prior to the change. If the
parties are unable to reach a new agreement within a reasonable time, then
either party may submit the issue to arbitration pursuant to Section 3.3 for the
purpose of reaching an alternative arrangement that is equitable under the
circumstances.

         5.3      Effects of Termination. Upon termination of this Agreement, as
provided in this Article V, neither party shall have any further obligations
hereunder except for (i) obligations accruing prior to the date of termination,
including, without limitation, payment of the Service Fee relating to services
provided prior to the termination of this Agreement, (ii) obligations, promises,
or covenants set forth herein that are expressly made to extend beyond the Term,
including, without limitation, insurance, indemnities and non-competition
provisions, which provisions shall survive the expiration or termination of this
Agreement. In effectuating the provisions of this Section 5.3, the PC
specifically acknowledges and agrees that if this Agreement terminates pursuant
to Sections 5.2(b) or (d), MANAGEMENT SERVICES shall continue for a period not
to exceed ninety (90) days to collect and receive on behalf of the PC on an
exclusive basis all cash collections from accounts receivable in existence at
the time this Agreement is terminated, it being understood that (a) such cash
collections may be used to compensate MANAGEMENT SERVICES for services rendered
prior to the termination of this Agreement, (b) MANAGEMENT SERVICES shall not be
entitled to collect accounts receivable after the termination date of this
Agreement is terminated pursuant to Section 5.2(a), and (c) the MANAGEMENT
SERVICES shall deduct for such cash collections any other amounts owed to
MANAGEMENT SERVICES under this Agreement, including, without limitation, any
reasonable costs incurred by MANAGEMENT SERVICES in carrying out the
post-termination procedures and transactions contemplated herein. MANAGEMENT
SERVICES shall remit remaining amounts from such collection activities, if any,
to the PC. Upon the expiration or termination of this Agreement for any reason
or cause whatsoever, MANAGEMENT SERVICES shall surrender to the PC all books and
records pertaining to the PC's Patient medical records and PC Records (as
defined in Section 7.2).

                                     - 13 -
<PAGE>

                            VI. RESTRICTIVE COVENANTS

         6.1.     Covenant Regarding Proprietary Information. In the course of
the relationship created pursuant to this Agreement, the PC will have access to
certain methods, trade secrets, processes, ideas, systems, procedures,
inventions, discoveries, concepts, software in various stages of development,
designs, drawings, specifications, models, data, documents, diagrams, flow
charts, research, economic and financial analysis, developments, procedures,
know-how, policy manuals, financial data, form contracts, marketing ad other
techniques, plans, materials, forms, copyrightable materials and trade
information regarding the operations of MANAGEMENT SERVICES and/or of its
Affiliates (collectively, the "Protected Parties"). The foregoing, together with
the existence and terms of this Agreement, are referred to in this Agreement as
"Proprietary Information". The PC shall maintain all such Proprietary
Information in strict secrecy and shall not divulge such information to any
third parties, except as may be necessary for the discharge of its obligations
under this Agreement. The PC shall take all necessary and proper precautions
against disclosure of any Proprietary Information to unauthorized persons by any
of its officers, directors, employees or agents. All officers, directors,
employees and agents of the PC who will have access to all or any part of the
Proprietary Information may be required to execute an agreement, at the
reasonable request of MANAGEMENT SERVICES, valid under the law of the
jurisdiction in which such agreement is executed, and in a form acceptable to
MANAGEMENT SERVICES and its counsel, committing themselves to maintain the
Proprietary Information in strict confidence and not to disclose it to any
unauthorized person or entity. The Protected Parties not party to this Agreement
are hereby specifically made third party beneficiaries of this Section 6.1, with
the power to enforce the provisions hereof. Upon termination of this Agreement
for any reason, the PC and each of its Employed Providers and Contracting
Providers shall cease all use of any of the Proprietary Information and, at the
request of MANAGEMENT SERVICES, shall execute such documents as may be necessary
to evidence the PC's abandonment of any claim thereto. The parties recognize
that a breach of this Section 6.1 cannot be adequately compensated in money
damages and therefore agree that injunctive relief shall be available to the
Protected Parties as their respective interests may appear.

         The obligations of the PC under this Section 6.1 shall not apply to
information: (i) which is a matter of public knowledge on or becomes a matter of
public knowledge after the Effective Date of this Agreement, other than as a
breach of the confidentiality terms of this Agreement or as a breach of the
confidentiality terms of any other agreement between the PC and MANAGEMENT
SERVICES or its Affiliates; or (ii) was lawfully obtained by the PC on a
nonconfidential basis other than in the course of performance under this
Agreement and from some entity other than MANAGEMENT SERVICES or its Affiliates
or from some person other than one employed or engaged by MANAGEMENT SERVICES or
its Affiliates, which entity or person has no obligation of confidentiality to
MANAGEMENT SERVICES or its Affiliates.

         6.2.     Covenants Not to Compete During the Term. The parties
recognize that the services to be provided by MANAGEMENT SERVICES shall be
feasible only if the PC operates an active medical practice to which the PC and
Employed Providers devote full time

                                     - 14 -
<PAGE>

 and attention. To that end:

                  (a)      Restrictive Covenants by the PC. During the term of
this Agreement, the PC shall not establish, operate or provide physician or
other health care services at any medical office, clinic or other health care
facility providing services substantially similar to those provided by the PC
pursuant to this Agreement anywhere other than at the Offices and as may be
approved in writing by MANAGEMENT SERVICES. The PC shall also not enter into any
management or administrative services agreement or arrangement with any person
or entity other than MANAGEMENT SERVICES without MANAGEMENT SERVICES's prior
written approval.

                  (b)      Restrictive Covenants by Employed Providers. All
employment contracts between the PC and its Employed Providers shall name
MANAGEMENT SERVICES as a third-party beneficiary to the contract and shall not
be revised without the prior written consent of MANAGEMENT SERVICES. The
contracts shall include noncompetition agreements with its Employed Providers
who are physicians, the substance and form of which is set forth as Exhibit A
hereto, and which the PC will enforce.

         6.3.     Covenant Not to Compete Following Termination. For three (3)
years following the termination of this Agreement by MANAGEMENT SERVICES
pursuant to Section 5.2, the PC shall not enter into any management or
administrative services agreement or any similar arrangement with any person or
entity for the provision of the same or similar services as MANAGEMENT SERVICES
provides to the PC under this Agreement.

         6.4.     Covenant Not to Solicit. During the term of this Agreement and
for three (3) years following the termination of this Agreement, the PC shall
not:

                  (a)      Directly or indirectly solicit, recruit or hire, or
induce any party to solicit, recruit or hire any person who is an employee of,
or who has entered into an independent contractor arrangement with, MANAGEMENT
SERVICES or any Affiliate of MANAGEMENT SERVICES (excluding any person who
performs patient services);

                  (b)      Directly or indirectly, whether for itself or for any
other person or entity, call upon, solicit, divert or take away, or attempt to
solicit, call upon, divert or take away any of MANAGEMENT SERVICES's customers,
business, or clients; or

                  (c)      Disrupt, damage, impair or interfere with the
business of MANAGEMENT SERVICES.

         6.5.     Enforcement. MANAGEMENT SERVICES and the PC acknowledge and
agree that since a remedy at law for any breach or attempted breach of the
provisions of this Article VI or of Article VII shall be inadequate, either
party shall be entitled to specific performance and injunctive or other
equitable relief in case of any such breach or attempted breach, in addition to
whatever other remedies may exist by law. All parties hereto also waive

                                     - 15 -
<PAGE>

any requirement for the securing or posting of any bond in connection with the
obtaining of any such injunctive or other equitable relief. If any provision of
Article VI or Article VII relating to the restrictive period, scope of activity
restricted and/or other provisions described therein shall be declared by a
court of competent jurisdiction to exceed the maximum time period, scope of
activity restricted or geographical area such court deems reasonable and
enforceable under applicable law, the time period, scope of activity restricted
and/or area of restriction held reasonable and enforceable by the court shall
thereafter be the restrictive period, scope of activity restricted and/or the
territory applicable to the restrictive covenant provisions in this Article VI
or Article VII. The invalidity or non-enforceability of this Article VI or
Article VII in any respect shall not affect the validity or enforceability of
the remainder of this Article VI or Article VII or of any other provisions of
this Agreement.

                          VII. INFORMATION AND RECORDS

         7.1.     Ownership of Records. At all times during and after the term
of this Agreement, including any extensions or renewals hereof, all business
records, including but not limited to, business agreements, books of account,
general administrative records and all information generated under or contained
in the management information system pertaining to MANAGEMENT SERVICES's
obligations hereunder, and other business information of any kind or nature,
except for Patient medical records and the PC's Records (as defined in Section
7.2), shall be and remain the sole property of MANAGEMENT SERVICES; provided
that after termination of this Agreement the PC shall be entitled to reasonable
access to such records and information, including the right to obtain copies
thereof, for any purpose related to patient care or the defense of any claim
relating to patient care or the business of MANAGEMENT SERVICES or the PC.

         7.2.     The PC's Business and Financial Records. At all times during
and after the term of this Agreement, the financial, corporate and personnel
records and information relating exclusively to the business and activities of
the PC, as distinguished from the business and activity of MANAGEMENT SERVICES,
hereinafter referred to as "the PC's Records," shall be and remain the sole
property of the PC.

         7.3.     Access to Records. Each party shall be entitled, upon request
and with reasonable advance notice, to obtain access to all records of the other
party directly related to the performance of such party's obligations pursuant
to this Agreement; provided, however, that such right shall not allow for access
to records that must necessarily be kept confidential. Either party, at its
expense, shall have the right to make copies of any records to which it has
access pursuant to this Section.

         7.4.     Confidentiality of Records. MANAGEMENT SERVICES and the PC
shall adopt procedures for maintaining the confidentiality of the records
relating to the operations of MANAGEMENT SERVICES and the PC which do not
constitute Proprietary Information, which information is not otherwise available
to third parties publicly or by law, and shall comply with all applicable
federal and state statutes and regulations relating to such records. Patient

                                     - 16 -
<PAGE>

medical records and other privileged Patient information shall not be disclosed
or utilized by the PC or MANAGEMENT SERVICES or their agents or employees except
as required or permitted by applicable laws and regulations.

                               VIII. MISCELLANEOUS

         8.1.     Independent Contractor Status of Parties. In the performance
of the work, duties and obligations under this Agreement, it is mutually
understood and agreed that each party is at all times acting and performing as
an independent contractor with respect to the other and that no relationship of
partnership joint venture or employment is created by this Agreement. Neither
party, nor any other person performing services on behalf of such party pursuant
to this Agreement, shall have any right or claim against the other party for
Social Security benefits, workers' compensation benefits, disability benefits,
unemployment insurance benefits, health benefits, vacation pay, sick leave or
any other employee benefits of any kind.

         8.2.     No Waiver. The waiver by any party to this Agreement of any
breach of any term or condition of this Agreement shall not constitute a waiver
of subsequent breaches. No waiver by any party of any provision of this
Agreement shall be deemed to constitute a waiver of any other provision.

         8.3.     Notices. If, at any time after the execution of this
Agreement, it shall become necessary or convenient for one of the parties to
serve any notice, demand or communication upon the other party, such notice,
demand, or communication shall be in writing and shall be served personally, by
nationally recognized overnight courier which provides confirmation of delivery,
or by depositing the same in the United States mail, registered or certified,
return receipt requested, postage prepaid and to such address as either party
may have furnished to the other party in writing as the place for the service of
notice. Any notice so mailed shall be deemed to have been given three (3) days
after the same has been deposited in the United States mall; when delivered if
the same has been given personally; or the next business day if the same has
been delivered to a nationally recognized overnight courier service.

         8.4.     Assignment. Neither party may sell, transfer, assign, or
otherwise convey its rights or obligations under this Agreement without the
prior written consent of the other, which consent shall not be unreasonably
withheld. Notwithstanding the foregoing, MANAGEMENT SERVICES shall have the
right to (a) assign its rights and/or delegate all or any of its obligations to
any of its Affiliates; and/or (b) subcontract some portion of its obligations
hereunder to a third party which is not an Affiliate of MANAGEMENT SERVICES, in
each case without the consent of the PC.

         8.5.     Successors and Assigns. Subject to the provisions of this
Agreement respecting assignment, the terms, covenants and conditions contained
herein shall be binding upon and inure to the benefit of the successors and
permitted assigns of the parties hereto.

         8.6.     Severability. Nothing contained in this Agreement shall be
construed to require

                                     - 17 -
<PAGE>

the commission of an act contrary to law, and whenever there is any conflict
between any provision of this Agreement and any statute, law, ordinance or
regulation, the latter shall prevail. In such event, and in any case in which
any provision of this Agreement is determined to be in violation of a statute,
law, ordinance or regulation, the affected provision(s) shall be limited only to
the extent necessary to bring it within the requirements of the law and, insofar
as possible under the circumstances, to carry out the purposes of this
Agreement. The other provisions of this Agreement shall remain in full force and
effect, and the invalidity or unenforceability of any provision hereof shall not
affect the validity and enforceability of the other provisions of this
Agreement, nor the availability of all remedies in law or equity to the parties
with respect to such other provisions.

         8.7.     Third Parties. Except as provided in Article VII, nothing in
this Agreement shall be construed to create any duty to, any standard of care
with reference to or any liability to anyone not a party to this Agreement.

         8.8.     Headings. The headings used in this Agreement are for
convenience of reference only and shall have no force or effect in the
construction or interpretation of the provisions of this Agreement.

         8.9.     Time of the Essence. Time is of the very essence of each and
all of the agreements, covenants and conditions of this Agreement.

         8.10.    Governing Law. This Agreement shall be deemed made, executed
and entered into and shall be governed by and construed in accordance with the
internal laws of the State of Florida.

         8.11.    Language Construction. The language in all parts of this
Agreement shall be construed, in all cases, according to its fair meaning, and
not for or against either party hereto. The parties acknowledge that each party
and its counsel have reviewed and revised this Agreement and that the normal
rule of construction to the effect that any ambiguities are to be resolved
against the drafting party shall not be employed in the interpretation of this
Agreement.

         8.12.    Indemnification. The PC shall indemnify, hold harmless and
defend MANAGEMENT SERVICES, its officers, directors, shareholders, employees,
agents and independent contractors (the "MANAGEMENT SERVICES Group") from and
against any and all liabilities, losses, damages, claims, causes of action, and
expenses (including reasonable attorneys' fees and disbursements (a "MANAGEMENT
SERVICES Loss")), caused or asserted to have been caused, directly or
indirectly, by or as a result of the performance of medical services or any
other acts or omissions by MANAGEMENT SERVICES and/or its partners, agents,
employees and/or subcontractors (other than MANAGEMENT SERVICES) during the term
hereof except with respect to any MANAGEMENT SERVICES Loss which is the result
of any gross negligence or willful misconduct by a member of the MANAGEMENT
SERVICES Group. MANAGEMENT SERVICES shall indemnify, hold harmless and defend
the PC, its

                                     - 18 -
<PAGE>

officers, directors, partners employees, agents and independent contractors (the
"the PC Group") from and against any and all liabilities, losses, damages,
claims, causes of action, and expenses (including reasonable judgment attorneys'
fees and disbursements) (a "the PC Loss"), caused or asserted to have been
caused, directly or indirectly, by or as a result of the performance of any acts
of omissions by MANAGEMENT SERVICES and/or its shareholders, agents, employees
and/or subcontractors during the term hereof except with respect to any the PC
Loss which is the result of any gross negligence or willful misconduct by a
member of the PC Group.

         8.13.    Entire Agreement. This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all prior and contemporaneous agreements, understandings,
negotiations and discussions, whether written or oral, between or among parties
regarding the subject matter of this Agreement.

         8.14.    Incorporation by Reference. All exhibits and other attachments
to this Agreement are incorporated by reference into this Agreement by such
reference.

         8.15.    Amendments Only in Writing. This Agreement may not be amended
or modified in any respect whatsoever, except by an instrument in writing signed
by the parties hereto.

         8.16.    Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be considered an original and all of which
shall constitute one and the same agreement. This Agreement shall not become
effective until it has been executed by all of the parties hereto.

         8.17.    Commercial Impracticability. No party to this Agreement shall
be liable for any failure to perform its obligations hereunder where such
failure results from any cause beyond that party's reasonable control,
including, for example, an act of God, labor disturbance such as a strike or
walkout, war, riot, fire, storm, accident, government regulation or
interference, or mechanical, electronic or communications failure.

         8.18.    Election of Remedies. The respective rights of the parties to
this Agreement shall be cumulative. Each party shall have all other rights and
remedies consistent with this Agreement as law and equity may provide. No
exercise by any party of one right or remedy shall be deemed to be an exclusive
election of rights or remedies.

         8.19.    Survival. The provisions of Articles III, IV, V, VI, VII and
VIII shall survive any termination of this Agreement.

         8.20.    Third Party Beneficiaries. Except with respect to Affiliates
of MANAGEMENT SERVICES, nothing in this Agreement shall be construed to create
any duty to, any standard of care with reference to, or any liability to any
Person not a party to this Agreement. The Affiliates of MANAGEMENT SERVICES are
intended third party beneficiaries of this Agreement.

                                     - 19 -
<PAGE>

         8.21     Affiliate. An "Affiliate" of an entity means (i) any person or
entity directly or indirectly controlled by such entity; (ii) any person or
entity directly or indirectly controlling such entity; (iii) any subsidiary of
such entity if the entity has a fifty percent (50%) or greater ownership
interest in the subsidiary; or (iv) such entity's parent entity if the parent
has a fifty percent (50%) or greater ownership interest in the entity. For
purposes of this Agreement, the PC is not an Affiliate of MANAGEMENT SERVICES.

         IN WITNESS WHEREOF, MANAGEMENT SERVICES and the PC have caused this
Agreement to be executed by their duly authorized respective officers as of the
Effective Date.

Signed and sealed in
the presence of:

                                              MARYLAND RADIATION THERAPY
                                              MANAGEMENT SERVICES, INC.
/s/ G DAVID SCHIERING
---------------------------------------
Printed name: G DAVID SCHIERING
(Witness 1)

                                              By: /s/ Daniel E. Dosoretz
                                                 -------------------------------
                                                 Daniel E. Dosoretz, M.D.
/s/ HERBERT ORT                                  President
---------------------------------------
Printed name: HERBERT ORT
(witness 2)

                                     - 20 -
<PAGE>

/s/ G DAVID SCHIERING                         KATIN RADIATION THERAPY, P.A.
---------------------------------------
Printed name: G DAVID SCHIERING
(witness 1)                                   By: /s/ Michael J. Katin
                                                  ------------------------------
                                                  Michael J. Katin, M.D.
/s/ HERBERT ORT                                   President
---------------------------------------
Printed name: HERBERT ORT
(witness 2)

STATE OF FLORIDA )
                           )
COUNTY OF LEE              )

         The foregoing instrument was acknowledged before me this 13 day of
April, 1999, by Daniel E. Dosoretz, M.D., the President of Maryland Radiation
Therapy Management Services, Inc., a Maryland corporation organized under the
laws of the State of Maryland, on behalf of the corporation.

[SEAL]                     MARIA MARGARITA SUAREZ
[STATE OF FLORIDA]         My Comm Exp. 2/26/00
[NOTARY PUBLIC]            Bonded By Service Ins
                               No. CC535363

                                       Signature: /s/ MARIA MARGARITA SUAREZ
                                                  ------------------------------
                                       Printed name: MARIA MARGARITA SUAREZ
                                       Notary Public

STATE OF FLORIDA )
                           )
COUNTY OF LEE              )

         The foregoing instrument was acknowledged before me this 13th day of
April, 1999, by Michael J. Katin, M.D., the President of Katin Radiation
Therapy, P. A., a Maryland professional corporation organized under the laws of
the State of Maryland, on behalf of the corporation.

[SEAL]                     MARIA MARGARITA SUAREZ
[STATE OF FLORIDA]         My Comm Exp. 2/26/00
[NOTARY PUBLIC]            Bonded By Service Ins
                               No. CC535363

                                       Signature: /s/ MARIA MARGARITA SUAREZ
                                                  ------------------------------
                                       Printed name: MARIA MARGARITA SUAREZ
                                       Notary Public

                                     - 21 -
<PAGE>

                                    EXHIBIT A

                            NONCOMPETITION AGREEMENT

                   NON-COMPETITIVE AND RESTRICTIVE AGREEMENTS.

                  A.       During the term of this Agreement and any renewal
period, Physician shall not undertake any professional service except as
directed and authorized by [Employer] and shall not engage in any profession
other than the rendition of the professional services as directed by [Employer].

                  B.       In the event of the termination of this Agreement for
any reason, Physician agrees not to directly or indirectly engage in the
practice of radiation therapy or oncology, or otherwise compete with [Employer],
or any of its physician providers, by practicing as a radiation therapist or
oncologist (i) at any hospital in which physician providers of [Employer]
regularly admit patients, or (ii) within any county in which [Employer] or any
of its Affiliates operate an Office for a period of two (2) years after the date
of such actual termination of this Agreement. The purpose of this covenant is to
protect [Employer] from the irreparable harm it will suffer if Physician
competes with [Employer] after having been introduced to [Employer]'s personnel
and patients and after learning special medical procedures used by [Employer]'s
physician providers, [Employer]'s business procedures, office and practice
policies, and the special and confidential professional procedures developed by
[Employer].

                  C.       The parties agree that in the event of any breach or
attempted breach of any of the covenants set out in section B (the "Covenant Not
to Compete"), [Employer] will be entitled to equitable relief by way of
injunction or otherwise, in addition to any remedy at law which may be
available. The parties agree that any violation or threatened violation by
Physician of the Covenant Not to Compete will cause [Employer] to suffer
irreparable harm. The parties agree that [Employer]'s remedy of an injunction is
not the exclusive remedy for breach of the Covenant Not to Compete and that a
court may grant such additional relief as is reasonable.

                  D.       In the event Physician breaches the Covenant Not to
Compete, in addition to the injunctive relief to which [Employer] shall be
entitled under the law, Physician shall immediately repay to [Employer] any
amounts paid by [Employer] pursuant to section 3.B hereof after the termination
of this Agreement, and all severance or termination pay, if any, paid pursuant
to this Agreement. [Employer] may offset against any amounts owed Physician
pursuant to this Agreement any amounts Physician owes [Employer] pursuant to
paragraph E below for breach of the Covenant Not to Compete.

                  E.       In addition to the injunctive relief to which
[Employer] is entitled under the law and in addition to the payments provided
for in paragraph D above and in order to compensate [Employer] for the damages
it will incur in recruiting and compensating a

                                     - 22 -
<PAGE>

replacement radiation oncologist and for the lost business it will suffer, in
the event of a breach by Physician of the Covenant Not to Compete, Physician
shall also pay to [Employer], as liquidated damages, a sum equal to a percentage
of the gross billings of [Employer] for the twelve month period immediately
preceding the termination of this Agreement. The percentage shall be that formed
by dividing the number one by the number equal to the total number of physician
providers of [Employer], including Physician, on the date of termination of this
Agreement. The parties agree that, in the event of the breach by Physician of
the Covenant Not to Compete, the actual amount of damages which would be
incurred by [Employer] would be difficult to ascertain and prove, and that
therefore the liquidated damages sum set forth herein would be reasonable and
appropriate.

                  F.       In the event the Covenant Not to Compete shall be
determined by a court of competent jurisdiction to be unenforceable by reason of
its geographic or temporal restrictions being too great, or by reason that the
range of activities covered is too great, or for any other reason, section B
shall be interpreted to extend over the maximum geographic area, period of time,
range of activities or other restrictions as to which it may be enforceable.

                                     - 23 -
<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                   "Maryland"

         This Addendum (the "Addendum") is entered into as of January 1, 2000,
by and among MARYLAND RADIATION THERAPY MANAGEMENT SERVICES, INCORPORATED, a
Maryland corporation ("MANAGEMENT SERVICES") and KATIN RADIATION THERAPY, P.A.,
a Maryland professional corporation (the "PC"). This Addendum amends Section 3.1
of the Administrative Services Agreement, dated October 31, 1998, between the
parties (the "Agreement").

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1. Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PC shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $100,000. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

 Accepted:                 MARYLAND RADIATION THERAPY
                           MANAGEMENT SERVICES, INCORPORATED

                           By:/s/  Daniel E. Dosoretz,
                              --------------------------------------------------
                              Daniel E. Dosoretz, M.D.
                              President

Accepted:                  KATIN RADIATION THERAPY, P.A.

                           By: /s/  Michael J. Katin,
                              --------------------------------------------------
                              Michael J. Katin, M.D.
                              President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                   "Maryland"

         This Addendum (the "Addendum") is entered into as of January 1, 2001,
by and among MARYLAND RADIATION THERAPY MANAGEMENT SERVICES, INC., a Maryland
corporation ("MANAGEMENT SERVICES") and KATIN RADIATION THERAPY, P.A., a
Maryland professional corporation (the "PA"). This Addendum amends Section 3.1
of the Administrative Services Agreement dated October 31, 1998 between the
parties (the "Agreement") and replaces the Addendum of that same Section dated
January 1, 2000.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1. Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PA shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $114,166.67. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

Accepted:                  MARYLAND RADIATION THERAPY
                           MANAGEMENT SERVICES, INC.

                           By:/s/   David Koeninger
                              --------------------------------------------------
                              David Koeninger
                              Chief Financial Officer

Accepted:                  KATIN RADIATION THERAPY, P.A.

                           By: /s/  Michael J. Katin,
                              --------------------------------------------------
                              Michael J. Katin, M.D.
                              President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                   "Maryland"

          This Addendum (the "Addendum") is entered into as of January 1, 2002,
by and among MARYLAND RADIATION THERAPY MANAGEMENT SERVICES, INC., a Maryland
corporation ("MANAGEMENT SERVICES") and KATIN RADIATION THERAPY, P.A., a
Maryland professional corporation (the "PA"). This Addendum amends Section 3.1
of the Administrative Services Agreement dated October 31,1998 between the
parties (the "Agreement") and replaces the Addendum of that same Section dated
January 1, 2001.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1. Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PA shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $113,333.33. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

Accepted:                  MARYLAND RADIATION THERAPY
                           MANAGEMENT SERVICES, INC.

                           By:/s/ David Koeninger
                              --------------------------------------------------
                              David Koeninger
                              Chief Financial Officer

Accepted:                  KATIN RADIATION THERAPY, P.A.

                           By:__________________________________________________
                              Michael J. Katin, M.D.
                              President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT
                                   "Maryland"

         This Addendum (the "Addendum") is entered into as of January 1, 2003,
by and among MARYLAND RADIATION THERAPY MANAGEMENT SERVICES, INC., a Maryland
corporation ("MANAGEMENT SERVICES") and KATIN RADIATION THERAPY, P.A., a
Maryland professional corporation (the "PA"). This Addendum amends Section 3.1
of the Administrative Services Agreement dated October 31, 1998 between the
parties (the "Agreement") and replaces the Addendum of that same Section dated
January 1, 2002.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1. Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PA shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $113,333.33. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

Accepted:                  MARYLAND RADIATION THERAPY
                           MANAGEMENT SERVICES, INC.

                           By:/s/   David Koeninger
                              --------------------------------------------------
                               David Koeninger
                               Chief Financial Officer

Accepted:                  KATIN RADIATION THERAPY, P.A.

                           By: /s/  Michael J. Katin,
                              --------------------------------------------------
                               Michael J. Katin, M.D.
                               President

<PAGE>

                  ADDENDUM TO ADMINISTRATIVE SERVICES AGREEMENT

         This Addendum (the "Addendum") is entered into as of January 1, 2004,
by and among MARYLAND RADIATION THERAPY MANAGEMENT SERVICES, INC., a Maryland
corporation ("MANAGEMENT SERVICES") and KATIN RADIATION THERAPY. P.A., a
Maryland professional corporation (the "PA"). This Addendum amends Section 3.1
of the Administrative Services Agreement dated October 31, 1998 between the
parties (the "Agreement") and replaces the Addendum of that same Section dated
January 1, 2003.

         From and after the date hereof, Section 3.1 shall read as follows:

                           3.1. Service Fee. For the services to be provided
                  hereunder by MANAGEMENT SERVICES, the PA shall pay to
                  MANAGEMENT SERVICES a monthly Service Fee of $150,000.00. The
                  parties agree that the Service Fee represents the fair market
                  value of the services provided by MANAGEMENT SERVICES
                  hereunder and that the parties shall meet annually to
                  reevaluate the value of services provided by MANAGEMENT
                  SERVICES and shall establish the fair market value thereof for
                  purposes of this Section 3.1.

                  Accepted:                   MARYLAND RADIATION THERAPY
                                              MANAGEMENT SERVICES, INC.

                                              By: /s/ David Koeninger
                                                 -------------------------------
                                                 David Koeninger
                                                 Vice President & CFO

                  Accepted:                   KATIN RADIATION THERAPY. P.A.

                                              By: /s/ Daniel E. Dosoretz
                                                 -------------------------------
                                                 Daniel E. Dosoretz, M.D.
                                                 Vice President

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00065-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00065-of-00352.parquet"}]]