REGISTRATION RIGHTS AGREEMENT

      This Registration Rights Agreement ("Agreement") is entered into as of
_______, 2003, between Hythiam, Inc., a New York corporation ("Company"), and
_______ ("Investor").

      WHEREAS, pursuant to a Stock Purchase Agreement of even date herewith,
Company is selling and issuing to Investor shares of [Series A Convertible
Preferred Stock ("Preferred Stock"), which are convertible into shares of]
Company's common stock, par value $.001 ("Common Stock");

      [WHEREAS, Company is concurrently issuing a Warrant to Investor to
purchase additional shares of Company's Common Stock;] and

      WHEREAS, the shares of Common Stock [and the rights to acquire the
preferred shares and the shares of Common Stock issuable upon conversion of the
Preferred Stock and the exercise of the Warrant] are being granted in a private
placement without registration under the Securities Act of 1933, as amended (the
"Act"), in reliance on one or more exemptions from the registration requirements
under the Act;

      NOW THEREFORE, in consideration of the foregoing recitals and the
respective covenants and representations contained herein, the parties hereto,
intending to be legally bound, agree as follows:

      1.    Demand Registration

            (a) If Company shall merge or consolidate with another entity, or
the shareholders of Company shall sell, transfer or otherwise dispose of all or
substantially all of the shares of the Company to a corporation whose securities
are publicly traded ("Successor") in exchange for shares of common stock or
other securities of the Successor ("Merger"), and Company receives written
notice from Investor requesting that Company file a registration statement under
the Act covering the registration of all of the shares Common Stock then owned
by Investor, whether issuable upon conversion of the Preferred Stock or the
exercise of the Warrant, ("Shares"), Company will use its best efforts to effect
the registration under the Act of all Shares which investor requests to be
registered, to the extent necessary to permit the legally permissible sale or
other disposition by Investor.

            (b) If Investor intends to distribute the Shares covered by its
request by means of an underwriting, it will so advise Company as a part of the
request made pursuant to this Section. In such event, the right of Investor to
include its Shares in the registration shall be conditioned upon Investor's
participation in such underwriting and the inclusion of the Shares in the
underwriting. Company will enter into (together with Investor and the other
shareholders distributing their securities through the underwriting) an
underwriting agreement with the underwriter or underwriters selected by Company
for the underwriting, provided that the underwriting agreement is in customary
form and is reasonably acceptable to Company.

            (c) Notwithstanding the foregoing, if Company furnishes to Investor
a certificate signed by the President of Company stating that in the good faith
judgment of the Board of Directors of Company, it would be detrimental to
Company and its shareholders for the registration statement to be filed and it

<PAGE>

is therefore essential to defer the filing of the registration statement,
Company will have the right to defer the filing for a period of not more than
ninety (90) days after receipt of the request of investor; provided, however,
that Company may not utilize this right more than once in any twelve-month
period.

            (d) Company will not be obligated to prepare, file or to take any
action to effect any registration pursuant to this Section:

                  (i) Prior to a Merger;

                  (ii) After Company has effected a prior registration pursuant
to this Agreement and such registration has been declared or ordered effective;
or

                  (iii) During the period starting with the date ninety (90)
days prior to Company's good faith estimate of the date of filing of, and ending
on a date one hundred eighty (180) days after the effective date of, a
registration subject to Section 2 hereof; provided that Company is using
reasonable efforts to cause such registration statement to become effective.

      2. Piggyback Registration

            (a) Unless a registration statement has already been filed and
remains effective with respect to the Shares, each time Company or a Successor
determines to file a registration statement under the Act (other than on Form
S-1 solely covering an employee benefit plan, S-4 or S-8) in connection with the
proposed offer and sale for money of any of its securities, either for its own
account or on behalf of any other security holder, Company will give written
notice of its determination to Investor. Upon the written request of Investor
within thirty (30) days after the receipt of the written notice, Company will
cause all Shares of Investor to be included in the registration statement, to
the extent necessary to permit the legally permissible sale or other disposition
by Investor.

            (b) If the registration is for a public offering involving an
underwriting, Company will so advise Investor as a part of its written notice.
In such event, the right of Investor to registration pursuant to this Section is
conditioned upon Investor's participation in the underwriting and the inclusion
of Investor's Shares in the underwriting to the extent provided herein. Investor
will enter into (together with Company and the other shareholders distributing
their securities through the underwriting) an underwriting agreement with the
underwriter or underwriters selected by Company for the underwriting, provided
that the underwriting agreement is in customary form and is reasonably
acceptable to Investor.

            (c) Notwithstanding any other provision of this Section, if the
managing underwriter of an underwritten distribution advises Company and
Investor in writing that in its good faith judgment the number of Shares and the
other securities requested to be registered exceeds the number of Shares and
other securities which can be sold in the offering, then (i) the number of
Shares and other securities so requested to be included in the offering will be
reduced to that number of shares which in the good faith judgment of the
managing underwriter can be sold in the offering (except for shares to be issued
by Company in an offering initiated by Company, which will have priority over
the Shares), and (ii) the reduced number of shares will be allocated among all
participating holders of Common Stock and investor in proportion, as nearly as

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<PAGE>

practicable, to the respective number of Shares and other securities held by
Investor and other holders at the time of filing the registration statement in
relation to the total number of shares of Common Stock outstanding on a fully
diluted basis. All Shares and other securities which are excluded from the
underwriting by reason of the underwriter's marketing limitation and all other
Shares not originally requested to be so included will not be included in the
registration and will be withheld from the market by Investor for a period, not
to exceed one hundred eighty (180) days, which the managing underwriter
reasonably determines is necessary to effect the underwritten public offering.

      3. Registration Procedures. If and whenever Company is required by the
provisions of this Agreement to effect the registration of Shares under the Act,
Company, at its expense, will:

            (a) In accordance with the Act and all applicable rules and
regulations, prepare and file with the Securities and Exchange Commission
("SEC") a registration statement with respect to the Shares and use its
commercially reasonable efforts to cause the registration statement to become
effective, and prepare and file with the SEC such amendments and supplements to
the registration statement and the prospectus contained therein as may be
necessary to keep the registration statement effective and the registration
statement and prospectus accurate and complete until the Shares covered by such
registration statement have been sold;

            (b) If the offering is to be underwritten in whole or in part, enter
into a customary written underwriting agreement in form and substance reasonably
satisfactory to the managing underwriter of the public offering, Investor and
Company;

            (c) Furnish to Investor and the underwriters of the Shares being
registered such number of copies of the registration statement and each
amendment and supplement thereto, preliminary prospectus, final prospectus and
such other documents as the underwriters and Investor may reasonably request in
order to facilitate the public offering of the securities;

            (d) Use its commercially reasonable efforts to register or qualify
the securities covered by the registration statement under such state securities
or blue sky laws of such jurisdictions as Investor and the underwriters may
reasonably request within thirty (30) days prior to the original filing of the
registration statement, except that Company will not for any purpose be required
to execute a general consent to service of process or to qualify to do business
as a foreign corporation in any jurisdiction where it is not so qualified;

            (e) Notify Investor, promptly after it receives notice thereof, of
the date and time when the registration statement and each post-effective
amendment thereto has become effective or a supplement to any prospectus forming
a part of such registration statement has been filed;

            (f) Notify Investor of any request by the SEC for the amending or
supplementing of the registration statement or prospectus or for additional
information;

            (g) Prepare and file with the SEC, upon the request of Investor, any
amendments or supplements to the registration statement or prospectus which, in
the reasonable opinion of counsel for Investor, is required under the Act or the

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<PAGE>

rules and regulations of the SEC thereunder in connection with Investor's
distribution of the Shares;

            (h) Prepare and file with the SEC, and notify Investor of the filing
of, such amendments or supplements to the registration statement or prospectus
as may be necessary to correct any statements or omissions if, at the time when
a prospectus relating to the securities is required to be delivered under the
Act, any event has occurred as the result of which the prospectus or any other
prospectus as then in effect would include an untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary to make the statements therein not misleading;

            (i) In case Investor or any underwriter for Investor is required to
deliver a prospectus at a time when the prospectus then in circulation is not in
compliance with the Act or the rules and regulations of the SEC, prepare upon
request such amendments or supplements to such registration statement and such
prospectus as may be necessary in order for the prospectus to comply with the
requirements of the Act and such rules and regulations;

            (j) Advise Investor, after it receives notice or obtains knowledge
thereof, of the issuance of any stop order by the SEC suspending the
effectiveness of the registration statement or the initiation or threatening of
any proceeding for that purpose and promptly use its commercially reasonable
efforts to prevent the issuance of any stop order or to obtain its withdrawal if
a stop order should be issued;

            (k) Not file any registration statement or prospectus or any
amendment or supplement to a registration statement or prospectus to which
Investor has, at least five (5) business days prior to filing, reasonably
objected on the grounds that the registration statement or prospectus or
amendment or supplement thereto does not comply in all material respects with
the requirements of the Act or the rules and regulations thereunder. The failure
of Investor or its counsel to review or object to any registration statement or
prospectus or any amendment or supplement to a registration statement or
prospectus will not affect the indemnification rights of Investor or its
respective officers, directors, partners, legal counsel, accountants or
controlling persons or any underwriter or any controlling person of such
underwriter under Section 5 hereof;

            (l) Make available for inspection upon request by Investor, a
managing underwriter of a distribution to be effected pursuant to a registration
statement under this Agreement, and any attorney, accountant or other agent
retained by Investor or its underwriter, all pertinent corporate, financial and
other documents and records of Company, and cause Company's officers, directors
and employees to supply all information reasonably requested by Investor,
underwriter, attorney, accountant or agent in connection with the registration
statement; and

            (m) At the request of Investor, furnish to Investor on the effective
date of the registration statement or, if the registration includes an
underwritten public offering, at the closing provided for in the underwriting
agreement, (i) an opinion dated such date of the counsel representing Company
for the purposes of the registration, addressed to the underwriters, if any, and
to investor, covering such matters with respect to the registration statement,
the prospectus and each amendment or supplement thereto, proceedings under state
and federal securities laws, other matters relating to Company, the securities

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<PAGE>

being registered and the offer and sale of such securities as are customarily
the subject of opinions of issuer's counsel provided to underwriters in
underwritten public offerings, and such opinion of counsel will additionally
cover such legal and factual matters with respect to the registration as
Investor may reasonably request, and (ii) letters dated each of such effective
date and such closing date, from the independent certified public accountants of
Company, addressed to the underwriters, if any, and to Investor, stating that
they are independent certified public accountants within the meaning of the Act
and dealing with such matters as the underwriters may request, or, if the
offering is not underwritten, that in the opinion of such accountants the
financial statements and other financial data of Company included in the
registration statement or the prospectus or any amendment or supplement thereto
comply in all material respects with the applicable accounting requirements of
the Act, and additionally covering such other accounting and financial matters,
including information as to the period ending not more than five (5) business
days prior to the date of such letter with respect to the registration statement
and prospectus, as Investor may reasonably request.

      4. Expenses

            (a) With respect to each inclusion of Shares in a registration
statement pursuant to this Agreement, Company will bear all fees, costs and
expenses of and incidental to the registration and the public offering in
connection therewith; provided, however, that Investor will bear its pro rata
share of the underwriting discount and commissions.

            (b) The fees, costs and expenses of registration to be borne as
provided in this Section, include, without limitation, all registration, filing
and NASD fees, printing expenses, fees and disbursements of counsel and
accountants for Company, fees and disbursements of counsel for the underwriter
or underwriters of such securities (if Company and/or selling security
shareholders are otherwise required to bear such fees and disbursements),
reasonable fees and disbursements of counsel for Investor (up to $50,000), and
all legal fees and disbursements and other expenses of complying with state
securities or blue sky laws of any jurisdictions in which the securities to be
offered are to be registered or qualified.

      5.    Indemnification

            (a) Company will indemnify and hold harmless pursuant to the
provisions of this Agreement Investor and each of Investor's officers,
directors, partners, legal counsel and accountants, and each person who controls
Investor within the meaning of the Act and any underwriter (as defined in the
Act) for Investor, and any person who controls such underwriter within the
meaning of the Act, from and against, and to reimburse Investor, its officers,
directors, partners, legal counsel, accountants and controlling persons and each
underwriter and controlling person of such underwriter with respect to, any and
all claims, actions (actual or threatened), demands, losses, damages,
liabilities, costs and expenses to which Investor, its officers, directors,
partners, legal counsel, accountants or controlling persons or any such
underwriter or controlling person of such underwriter may become subject under
the Act or otherwise, insofar as such claims, actions, demands, losses, damages,
liabilities, costs or expenses arise out of or are based upon any untrue
statement or alleged untrue statement of any material fact contained in such
registration statement, any prospectus contained therein, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or

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<PAGE>

necessary to make the statements therein not misleading, in light of the
circumstances in which they were made; provided, however, that Company will not
be liable in any such case to the extent that any claim, action, demand, loss,
damage, liability, cost or expense is caused by an untrue statement or alleged
untrue statement or omission or alleged omission so made in conformity with
written information furnished by Investor, such underwriter or such controlling
person specifically for use in the preparation thereof.

            (b) Investor will indemnify and hold harmless Company, its officers,
directors, legal counsel and accountants, any underwriter and each person who
controls Company or any underwriter within the meaning of the Act, from and
against, and agrees to reimburse Company, its officers, directors, legal
counsel, accountants and controlling persons, any underwriter with respect to,
any and all claims, actions, demands, losses, damages, liabilities, costs or
expenses to which Company, its officers, directors, legal counsel, accountants,
such controlling persons, or any underwriter may become subject under the Act or
otherwise, insofar as such claims, actions, demands, losses, damages,
liabilities, costs or expenses are caused by any untrue or alleged untrue
statement of any material fact contained in such registration statement, any
prospectus contained therein or any amendment or supplement thereto, or are
caused by the omission or the alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances in which they were made, not misleading, in each
case, to the extent, but only to the extent, that such untrue statement or
alleged untrue statement or omission or alleged omission was so made in reliance
upon and in conformity with written information furnished by Investor
specifically for use in the preparation thereof. Notwithstanding the foregoing,
Investor will not be obligated hereunder to pay more than the net proceeds
realized by it upon its sale of Shares included in such registration statement.

            (c) Promptly after receipt by a party indemnified pursuant to the
provisions of this Section of notice of the commencement of any action involving
the subject matter of the foregoing indemnity provisions, the indemnified party
will, if a claim therefor is to be made against the indemnifying party pursuant
to the provisions of this Section, notify the indemnifying party of the
commencement thereof; but the omission so to notify the indemnifying party will
not relieve it from any liability which it may have to an indemnified party
otherwise than under this Section and will not relieve the indemnifying party
from liability under this Section unless the indemnifying party is prejudiced by
such omission. In case any action is brought against any indemnified party, and
it notifies the indemnifying party of the commencement thereof, the indemnifying
party will be entitled to participate therein and, to the extent that it may
wish, jointly with any other indemnifying parties similarly notified, to assume
the defense thereof, with counsel satisfactory to the indemnified party;
provided, however, that if the defendants in any action include both the
indemnified party and the indemnifying party and the indemnified party
reasonably concludes that there may be legal defenses available to it and/or
other indemnified parties which are different from or additional to those
available to the indemnifying party, the indemnified party or parties will have
the right to select separate counsel (in which case the indemnifying party will
not have the right to direct the defense of such action on behalf of the
indemnified party or parties). Upon the permitted assumption by the indemnifying
party of the defense of an action, and approval by the indemnified party of
counsel, the indemnifying party will not be liable to the indemnified party
under this Section for any legal or other expenses subsequently incurred by the

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<PAGE>

indemnified party in connection with the defense thereof (other than reasonable
costs of investigation) unless (i) the indemnified party has employed separate
counsel in connection with the assertion of legal defenses in accordance with
the proviso to the next preceding sentence, (ii) the indemnifying party has
employed counsel satisfactory to the indemnified party to represent the
indemnified party within a reasonable time, (iii) the indemnifying party and its
counsel fail actively and vigorously to pursue the defense of the action or (iv)
the indemnifying party authorizes the employment of counsel for the indemnified
party at the expense of the indemnifying party. No indemnifying party will be
liable to an indemnified party for any settlement of any action or claim without
the consent of the indemnifying party, and no indemnifying party may
unreasonably withhold its consent to any such settlement. No indemnifying party
will consent to entry of any judgment or enter into any settlement which does
not include as an unconditional term thereof the giving by the claimant or
plaintiff to the indemnified party of a release from all liability with respect
to the claim or litigation.

            (d) If the indemnification provided for in this Section is held by a
court of competent jurisdiction to be unavailable to a party to be indemnified
with respect to any claims, actions, demands, losses, damages, liabilities,
costs or expenses referred to therein, then each indemnifying party under any
such section, in lieu of indemnifying the indemnified party thereunder, agrees
to contribute to the amount paid or payable by the indemnified party as a result
of the claims, actions, demands, losses, damages, liabilities, costs or expenses
in such proportion as is appropriate to reflect the relative fault of the
indemnifying party on the one hand and of the indemnified party on the other in
connection with the statements or omissions which resulted in the claims,
actions, demands, losses, damages, liabilities, costs or expenses, as well as
any other relevant equitable considerations. The relative fault of the
indemnifying party and of the indemnified party will be determined by reference
to, among other things, whether the untrue or alleged untrue statement of a
material fact or the omission or alleged omission to state a material fact
relates to information supplied by the indemnifying party or by the indemnified
party and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. Notwithstanding
the foregoing, the amount Investor will be obligated to contribute pursuant to
this section will be limited to an amount equal to the per share public offering
price (less any underwriting discount and commissions) multiplied by the number
of Shares sold by Investor pursuant to the registration statement which gives
rise to such obligation to contribute (less the aggregate amount of any damages
which Investor has otherwise been required to pay in respect of such claim,
action, demand, loss, damage, liability, cost or expense or any substantially
similar claim, action, demand, loss, damage, liability, cost or expense arising
from the sale of such Shares). No person guilty of fraudulent misrepresentation
(within the meaning of Section 11(f) of the Act) will be entitled to
contribution hereunder from any person who was not guilty of such fraudulent
misrepresentation.

            (e) In addition to its other obligations under this Section, Company
agrees to reimburse any underwriter and Investor pursuant to this Agreement (and
each of the underwriter's and Investor's controlling persons, officers,
directors, parties, legal counsel, accountants and underwriters, and controlling
persons of the underwriters) on a monthly basis for all reasonable legal fees
and other expenses incurred in connection with investigating or defending any
claim, action, investigation, inquiry or other proceeding arising out of or
based upon any statement or omission, or any alleged statement or admission,
described in Section 5(a), notwithstanding the possibility that such payments

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might later be held to be improper. To the extent that any payment is ultimately
held to be improper, each person receiving such payment will promptly refund it.

      6. Restrictions. Shares will only be treated as registrable securities if
and so long as they have not been (a) sold to or through a broker or dealer or
underwriter in a public distribution or a public securities transaction, or (b)
sold in a transaction exempt from the registration and prospectus delivery
requirements of the Act under Section 4(1) thereof so that all transfer
restrictions and restrictive legends with respect to such Shares are removed
upon the consummation of such sale and the seller and Investor receive an
opinion of counsel for Company, in form and content reasonably satisfactory to
the seller and buyer and their respective counsel, to the effect that the Shares
in the hands of investor are freely transferable without restriction or
registration under the Act in any public or private transaction.

      7. Information. Investor will furnish Company with such information with
respect to Investor and the Shares as Company may from time to time reasonably
request in writing and as may be required by law or by the SEC.

      8. Forms. All references in this Agreement to particular forms of
registration statements under the Act are intended to include, and will be
deemed to include, references to all successor forms which are intended to
replace, or to apply to similar transactions as, the forms herein referenced.

      9. Miscellaneous

            (a) Waivers and Amendments. Neither this Agreement nor any provision
hereof may be changed, waived, discharged or terminated orally or by course of
dealing, but only by a statement in writing signed by the party against which
enforcement of the change, waiver, discharge or termination is sought.
Specifically, but without limiting the generality of the foregoing, the failure
of one party at any time or times to require performance of any provision hereof
by the other party will not affect the right at a later time to enforce the
same. No waiver by any party of the breach of any term or provision contained in
this Agreement, in any one or more instances, will be deemed to be, or construed
as, a further or continuing waiver of any such breach, or a waiver of the breach
of any other term or covenant contained in this Agreement.

            (b) Successors and Assigns. The provisions of this Agreement will
inure to the benefit of and be binding upon the successors and assigns of each
of the parties hereto. Notwithstanding the foregoing, Investor will not assign
or delegate any of its rights or obligations under this Agreement. In the event
of a Merger, all rights of Company under this Agreement will be assigned to
Successor, Successor will assume all duties and obligations of Company under
this Agreement, and Company shall have no further liability therefor.

            (c) No Third-Party Beneficiaries. No person or entity not a party to
this Agreement will be deemed to be a third-party beneficiary hereunder or
entitled to any rights hereunder.

            (d) Interpretation. The words "include," "includes," and "including"
when used herein will be deemed in each case to be followed by the words
"without limitation." This Agreement has been negotiated by the respective

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parties hereto and their attorneys and the language hereof will not be construed
for or against any party. The words "hereof," "herein," "herewith," "hereby" and
"hereunder" and words of similar import will, unless otherwise stated, be
construed to refer to this Agreement as a whole and not to any particular
provision of this Agreement.

            (e) Severability. If any provision of this Agreement is held to be
illegal, invalid or unenforceable under present or future laws, then, if
possible, such illegal, invalid or unenforceable provision will be modified to
such extent as is necessary to comply with such present or future laws and such
modification will not affect any other provision hereof; provided that if such
provision may not be so modified, such illegality, invalidity or
unenforceability will not affect any other provision, but this Agreement will be
reformed, construed and enforced as if such invalid, illegal or unenforceable
provision had never been contained herein.

            (f) Descriptive Headings. The descriptive headings used in this
Agreement are inserted for convenience of reference and are not intended to be
part of or to affect the meaning or interpretation of this Agreement.

            (g) Expenses. Each party will pay all costs and expenses incurred by
it in connection with the execution and delivery of this Agreement and the
transactions contemplated hereby, including fees of legal counsel.

            (h) Further Assurances. Each party to this Agreement will do and
perform or cause to be done and performed all such further acts and things and
will execute and deliver all such agreements, certificates, instruments and
documents as the other party hereto may reasonably request in order to carry out
the intent and accomplish the purposes of this Agreement and the consummation of
the transactions contemplated hereby.

            (i) Arbitration. Any controversy, dispute or claim of any nature
whatsoever arising out of, in connection with or in relation to this Agreement,
or otherwise involving the parties hereto, including the issue of arbitrability
of any such disputes, will be resolved by binding arbitration before a retired
judge at JAMS in Los Angeles, California. The prevailing party in any dispute
will be awarded all attorney's fees, costs and expenses in addition to other
allowable costs.

            (j) Governing Law. This Agreement and all acts and transactions
pursuant hereto and the rights and obligations of the parties hereto will be
governed by, and construed in accordance with, the internal law of the State of
California, without regard to conflicts of laws.

            (k) Counterparts. This Agreement may be executed in counterparts,
each of which will be an original and all of which together will constitute one
and the same instrument.

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            (l) Entire Agreement. This Agreement, together with the related
written agreements entered into on the same date, constitutes the entire
agreement between the parties. No representations, agreements or promises have
been made except as expressly set forth herein. This Agreement supersedes any
prior negotiations, understandings or agreements, whether written or oral, and
any contemporaneous oral understandings or agreements.

            IN WITNESS WHEREOF, the parties have executed this Agreement as of
the date first set forth above.

                              COMPANY:

                              HYTHIAM, INC.


                              By:
                                    --------------------------------
                                    Terren S. Peizer,
                                    Chairman & CEO


                              INVESTOR:


                              By:
                                    --------------------------------


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