EXHIBIT 10(BF)

                             INDENTURE SUPPLEMENT NO. 20

     THIS INDENTURE SUPPLEMENT NO. 20, dated as of January 26, 1998 (this 
"Supplemental Indenture"), by and between Magellan Health Services, Inc., a 
Delaware corporation ("Magellan"), the guarantors set forth on the signature 
pages hereto (the "Guarantors") and Marine Midland Bank, as trustee (the 
"Trustee"), under that certain Indenture described below.

                                 W I T N E S S E T H:

     WHEREAS, Magellan and the Guarantors have heretofore executed and 
delivered to the Trustee that certain Indenture, dated as of May 2, 1994 (the 
"Indenture"), setting forth the terms and provisions of $375,000,000 
aggregate principal amount of Magellan's 11-1/4% Series A Senior Subordinated 
Notes due 2004 (the "Notes"); and

     WHEREAS, in connection with Magellan's proposed acquisition of Merit 
Behavioral Care Corporation ("Merit") through a merger of Merit with a 
wholly-owned subsidiary of Magellan,  Magellan is making a cash tender offer 
(the "Offer") to purchase the Notes and is soliciting consents (the 
"Solicitation") to certain amendments to the Indenture (the "Amendments") 
(all as described in the Offer to Purchase and Consent Solicitation Statement 
dated January 12, 1998 (the "Offer to Purchase and Consent Solicitation")); 
and

     WHEREAS, Section 10.02 of the Indenture provides that Magellan, the 
Guarantors and the Trustee may amend or supplement the Indenture with the 
written consent of holders of at least 66-2/3% in aggregate principal amount 
of the Notes at the time outstanding; and

     WHEREAS, written consents to the Amendments have been delivered to the 
Trustee by holders of at least 66-2/3% in aggregate principal amount of the 
Notes outstanding;

     NOW, THEREFORE, KNOW ALL MEN BY THESE PRESENTS, THAT THIS SUPPLEMENTAL 
INDENTURE WITNESSETH:

     That Magellan, the Guarantors and the Trustee in consideration of the 
premises and of the sum of TEN DOLLARS ($10.00), lawful money of the United 
States of America, to the Trustee paid by Magellan and the Guarantors, at or 
before the execution and delivery of this Supplemental Indenture, and for 
other good and valuable consideration, the receipt and sufficiency of which 
are hereby acknowledged, and intending to be legally bound hereby, DO HEREBY 
AGREE AS FOLLOWS:

     Section One.  Definitions.  For purposes of this Supplemental Indenture, 
all capitalized terms not otherwise defined herein shall be defined as set 
forth in the Indenture, unless the context otherwise clearly requires.

     Section Two.  Amendment to Table of Contents.  The Table of Contents to 
the Indenture is hereby amended by deleting the following and inserting in 
lieu thereof the notation "[deleted]":




     (1)  the words "Compliance Certificates" appearing therein under the 
heading Article 5, Section 5.03;

     (2)  the words "Further Instruments and Acts" appearing therein under 
the heading Article 5, Section 5.04;

     (3)  the words "Limitation on Restricted Payments" appearing therein 
under the heading Article 5, Section 5.06;

     (4)  the words "Limitation on Additional Indebtedness" appearing therein 
under the heading Article 5, Section 5.08;

     (5)  the words "Limitation on Sale of Subsidiary Shares" appearing 
therein under the heading Article 5, Section 5.10;

     (6)  the words "Limitation on Liens" appearing therein under the heading 
Article 5, Section 5.11;

     (7)  the words "Limitation on Payment Restrictions Affecting Restricted 
Subsidiaries" appearing therein under the heading Article 5, Section 5.12;

     (8)  the words "Limitation on Transactions with Affiliates" appearing 
therein under the heading Article 5, Section 5.13;

     (9)  the words "Payment of Taxes and Other Claims" appearing therein 
under the heading Article 5, Section 5.16;

     (10) the words "Maintenance of Properties and Insurance" appearing 
therein under the heading Article 5, Section 5.18; and

     (11) the words "Covenant to Comply with Securities Laws Upon Purchase of 
Securities" appearing therein under the heading Article 5, Section 5.21.    

     Section Three.  Amendment to Article 5.  Article 5 is hereby amended as 
follows:

     (1)  Section 5.02 is amended by deleting the section following the 
caption "SECTION 5.02", except for the last sentence of Section 5.02(1), and 
inserting in lieu thereof the notation "[intentionally omitted]";

     (2)  Section 5.03 is amended by deleting the section following the 
caption "SECTION 5.03" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";


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     (3)  Section 5.04 is amended by deleting the section following the 
caption "SECTION 5.04" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";

     (4)  Section 5.06 is amended by deleting the section following the 
caption "SECTION 5.06" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";

     (5)  Section 5.08 is amended by deleting the section following the 
caption "SECTION 5.08" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";

     (6)  Section 5.10 is amended by deleting the section following the 
caption "SECTION 5.10" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";

     (7)  Section 5.11 is amended by deleting the paragraph following the 
caption "SECTION 5.11" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";

     (8)  Section 5.12 is amended by deleting the paragraph following the 
caption "SECTION 5.12" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";

     (9)  Section 5.13 is amended by deleting the paragraph following the 
caption "SECTION 5.13" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";

     (10) Section 5.16 is amended by deleting the paragraph following the 
caption "SECTION 5.16" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]";

     (11) Section 5.18 is amended by deleting the section following the 
caption "SECTION 5.18" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]"; and

     (12) Section 5.21 is amended by deleting the section following the 
caption "SECTION 5.21" in its entirety and inserting in lieu thereof the 
notation "[intentionally omitted]".

     Section Four.  Amendment to Article 6.  Article 6 is hereby amended by 
deleting subsections 6.01(iii) and 6.01(iv) and Section 6.02 in their 
entirety and inserting in lieu thereof the notation "[intentionally omitted]";

     Section Five.  Amendment to Section 7.01.  Section 7.01 is hereby 
amended by deleting subsections 7.01(iii) and 7.01(vi) in their entirety and 
inserting in lieu thereof the notation "[intentionally omitted]";

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     Section Six.  Definitions.  

     (a)    Section 1.01 is hereby amended by deleting any defined terms that 
are no longer used in the Indenture pursuant to this Supplemental Indenture.

     (b)  Section 1.01 is hereby further amended by deleting the definition 
of "New Credit Agreement" in its entirety and in its place inserting the 
following new defined term and accompanying definition:

               "New Credit Agreement" means collectively (a) the Credit
          Agreement dated on or about the date of acceptance for purchase of the
          Securities pursuant to the Offer to Purchase and Consent Solicitation
          Statement of Magellan Health Services, Inc. dated January 12, 1998,
          among the Company, certain Subsidiaries of the Company, The Chase
          Manhattan Bank, as Administrative Agent, and the "Lenders" that are
          parties thereto, and (b) each note, guaranty, pledge agreement,
          mortgage, security agreement and other instrument and document from
          time to time entered into pursuant to or in respect of such Credit
          Agreement or any guaranty, as each such Credit Agreement and other
          document may be amended, restated, supplemented, extended, renewed and
          otherwise modified from time to time.

     (c)  The definition of "Senior Indebtedness," set forth as the second 
paragraph of Section 11.01, is hereby deleted in its entirety and in its 
place is inserted the following:

          For purposes of this Indenture, including without limitation this 
Section 11.01, "Senior Indebtedness"  means the principal of and premium, if 
any, and interest on (such interest on Senior Indebtedness, wherever referred 
to in this Indenture, being deemed to include interest accruing after the 
filing of a petition initiating any proceeding pursuant to any bankruptcy law 
in accordance with and at the rate (including any rate applicable upon any 
default or event of default, to the extent lawful) specified in any document 
evidencing the Senior Indebtedness, whether or not the claim for such 
interest is allowed as a claim after such filing in any proceeding under such 
bankruptcy law) and other amounts (including, but not limited to, fees, 
expenses, reimbursement obligations in respect of letters of credit and 
indemnities) due or payable from time to time on or in connection with any 
Indebtedness of the Company or any of its Restricted Subsidiaries which is 
incurred (i) under the New Credit Agreement or any replacement or substitute 
facility or facilities thereof (provided that Indebtedness under the New 
Credit Agreement or any replacement or substitute facility or facilities, 
including unused commitments, shall not at any time exceed $900,000,000 in 
aggregate outstanding principal amount (including the available undrawn 
amount of any letters of credit issued under the New Credit Agreement or any 
replacement or substitute facility or facilities thereof)); (ii) Indebtedness 
of the Company and its Restricted Subsidiaries which Indebtedness was in 
existence on the Closing Date; (iii) Indebtedness created, incurred, issued, 
assumed or guaranteed in exchange for or the proceeds of which are used to 
extend, refinance, renew, replace, substitute or refund Indebtedness 
permitted 

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by clause (ii) above (the "Refinancing Indebtedness"); provided, however, 
that (A) the principal amount of such Refinancing Indebtedness shall not 
exceed the principal amount of Indebtedness (including unused commitments) so 
extended, refinanced, renewed, replaced, substituted or refunded (plus costs 
of issuance), (B) such Refinancing Indebtedness ranks, relative to the 
Securities, no more senior than the Indebtedness being refinanced thereby, 
(C) such Refinancing Indebtedness bears interest at a market rate, and (D) 
such Refinancing Indebtedness (1) shall have an Average Life equal to or 
greater than the Average Life of the Indebtedness being extended, refinanced, 
renewed, replaced, substituted or refunded or (2) shall not have a scheduled 
maturity, principal repayment, sinking fund payment or mandatory redemption 
on or prior to the maturity of the Securities; (iv) Indebtedness arising from 
guarantees, letters of credit, and bid or performance bonds securing any 
obligations of the Company or any Restricted Subsidiary incurred in the 
ordinary course of business; (v) Indebtedness for borrowed money denominated 
in foreign currencies not to exceed an aggregate principal amount at any time 
equal to the equivalent in such foreign currencies of $5,000,000 in U.S. 
dollars; (vi) Capital Lease Obligations in an aggregate amount outstanding at 
any time not to exceed 5% of the Company's Consolidated Net Assets; (vii) 
Guarantees of any Senior Indebtedness; (viii) Indebtedness other than, and in 
addition to, that permitted pursuant to the foregoing clauses (i) through 
(vii) provided that the aggregate outstanding amount of such other additional 
Indebtedness pursuant to this clause (viii) does not at any time exceed 
$50,000,000, all or any portion of which Indebtedness, notwithstanding clause 
(i) above, may be incurred pursuant to the New Credit Agreement or any 
replacement or substitute facility or facilities thereof; and (ix) directly 
or indirectly, any Indebtedness other than, and in addition to, that 
permitted pursuant to the foregoing clauses (i) through (viii) where, after 
giving pro forma effect to the incurrence of such other additional 
Indebtedness pursuant to this clause (ix) and the application of any of the 
proceeds therefrom to repay Indebtedness, the Consolidated Interest Coverage 
Ratio of the Company for the four fiscal quarters ending immediately prior to 
the date such additional Indebtedness is created, incurred, issued, assumed 
or guaranteed will be at least 2.25, provided that such calculation shall 
give pro forma effect to the acquisition of any Person, business, property or 
assets made since the first day of such four fiscal quarter period as if such 
acquisition had occurred at the beginning of such four quarter period; in 
each case that are outstanding on the Closing Date or thereafter created, 
incurred or assumed, unless, in the case of any particular Indebtedness, the 
instrument creating or evidencing the same or pursuant to which the same is 
outstanding expressly provides that such Indebtedness shall not be senior in 
right of payment to the Securities. Notwithstanding anything to the contrary 
in the foregoing, Senior Indebtedness shall not include (a) any Indebtedness 
of the Company to any of its Subsidiaries or other Affiliates, (b) any 
Indebtedness incurred after the Closing Date that is contractually 
subordinated in right of payment to any Senior Indebtedness, and (c) amounts 
owed (except to banks and other financial institutions) for goods, materials 
or services purchased in the ordinary course of business or for compensation 
to employees.


     Section Seven.  Trust Indenture Act.  Notwithstanding the provisions of 
this Supplemental Indenture, Magellan agrees to comply with the provisions of 
the Trust Indenture 

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Act of 1939 (the "TIA"), including Section 314(a) of the TIA which requires 
Magellan, among other things, to provide to the Trustee (i) copies of the 
annual reports and other information which Magellan is required to provide to 
the Commission pursuant to Section 13 or Section 15(d) of the Securities 
Exchange Act of 1934 and (ii) to provide to the Trustee annual compliance 
certificates as to Magellan's compliance with all conditions and covenants 
contained in the Indenture. 

     Section Eight.  Effective Date. This Supplemental Indenture is dated as 
of the 26th day of January, 1998 but the Amendments set forth herein shall be 
operative only upon, and simultaneously with, and shall have no force and 
effect prior to, the acceptance for purchase and payment of the Notes 
tendered pursuant to the Offer.

     Section Nine.  Other Provisions.

     (a)  Trust Indenture Act Controls.  If any provision of this 
Supplemental Indenture limits, qualifies or conflicts with the duties imposed 
by TIA Section 318(c), the imposed duties shall control.

     (b)  Acceptance by Trustee.  The Trustee hereby accepts the trusts in 
this Supplemental Indenture declared and provided upon the terms and 
conditions set forth in the Indenture.  The Trustee shall not be responsible 
in any manner whatsoever for the validity or sufficiency of this Supplemental 
Indenture or the due execution hereof by the Company or for or in respect of 
the recitals and statements contained herein, all of which recitals and 
statements are made solely by the Company.

     (c)  Notice to Securityholders.  After the Amendments become effective, 
the Company shall mail to the holders of the Notes a notice briefly 
describing such Amendments.

     (d)  Governing Law.  This Supplemental Indenture shall be governed by 
and construed in accordance with the laws of the State of New York.

     (e)  Successors.  All agreements of the Company in this Supplemental 
Indenture shall bind its successors.  All agreements of the Trustee in this 
Supplemental Indenture shall bind its successors.

     (f)  Duplicate Originals.  The parties may sign any number of copies of 
this Supplemental Indenture.  Each signed copy shall be an original, but all 
of them together represent the same agreement.

     (g)  Separability.  In case any provision in this Supplemental Indenture 
shall be invalid, illegal or unenforceable, the validity, legality and 
enforceability of the remaining provisions shall not in any way be affected 
or impaired thereby.

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     (h)  Headings, Etc.  The Article and Section headings of this 
Supplemental Indenture have been inserted for convenience of reference only, 
are not to be considered a part hereof, and shall not in any way modify or 
restrict any of the terms and provisions hereof.  Except as expressly 
provided herein and notwithstanding the elimination of certain Sections of 
this Indenture as set forth herein, all references to Sections in the 
Indenture shall remain unchanged.

     (i)  Benefits of Supplemental Indenture.  Nothing in this Supplemental 
Indenture, express or implied, shall give to any Person, other than the 
parties hereto and their successors hereunder, any Paying Agent and the 
holders of the Notes, any benefit or any legal or equitable right, remedy or 
claim under this Supplemental Indenture.

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     IN WITNESS WHEREOF, Magellan has caused this Supplemental Indenture to 
be executed in its corporate name and attested by its authorized officer, 
each Guarantor has caused this Supplemental Indenture to be executed in its 
corporate name and attested by its authorized officer and the Trustee has 
caused this Supplemental Indenture to be executed in its corporate name and 
attested by its authorized officer, as of this 26th day of January, 1998.

                              MAGELLAN HEALTH SERVICES, INC.


                              By: /s/ James R. Bedenbaugh
                                  -----------------------------
                                  James R. Bedenbaugh
                                  Vice President and Treasurer
Attest:

/s/ Charlotte A. Sanford
- ------------------------------
Charlotte A. Sanford
Assistant Treasurer


                              THE GUARANTORS LISTED ON EXHIBIT A
                    ATTACHED HERETO


                              By: /s/ Charlotte A. Sanford
                                  ------------------------------
                                  Charlotte A. Sanford
                                  Treasurer or as Director
                                     for each of the Guarantors

Attest:

- ------------------------------
Name:
Title: 


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                              THE GUARANTORS LISTED ON EXHIBIT B
                    ATTACHED HERETO


                              By: /s/ James R. Bedenbaugh
                                  ------------------------------
                                  James R. Bedenbaugh 
                                  Treasurer 
                                      for each of the Guarantors

Attest:

- ------------------------------
Name:
Title: 


Attest:

- ------------------------------
Name:
Title: 


                              MARINE MIDLAND BANK, as Trustee


                              By: /s/ Frank J. Godino
                                  ------------------------------
                                  Frank J. Godino
                                  Assistant Corporate Trust Officer

Attest:

- ------------------------------
Name:
Title:


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