SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                   Under the Securities Exchange Act of 1934*

                         Magellan Health Services, Inc.
          ------------------------------------------------------------
                                (Name of Issuer)

                Ordinary Common Stock, par value $0.01 per share
          ------------------------------------------------------------
                         (Title of Class of Securities)

                                    559079207
          ------------------------------------------------------------
                      (CUSIP Number of Class of Securities)

                                 Daniel S. Loeb
                      Third Point Management Company L.L.C.
                         360 Madison Avenue, 24th Floor
                               New York, NY 10017
                                 (212) 224-7400
          ------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                   Copies to:
                              Jack H. Nusbaum, Esq.
                            Willkie Farr & Gallagher
                               787 Seventh Avenue
                             New York, NY 10019-6099
                                 (212) 728-8000

                                 January 6, 2004
          ------------------------------------------------------------
                          (Date of Event which Requires
                            Filing of this Schedule)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box: [ ]

NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 240.13d-7 for other
parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).





                                  SCHEDULE 13D

-------------------------------                   ------------------------------
CUSIP No.      559079207                          Page 2 of 10 Pages
-------------------------------                   ------------------------------

--------------------------------------------------------------------------------
   1    NAME OF REPORTING PERSON
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Daniel S. Loeb
--------------------------------------------------------------------------------
   2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                      (a) [ ]
                                                                      (b) [X]
--------------------------------------------------------------------------------
   3    SEC USE ONLY

--------------------------------------------------------------------------------
   4    SOURCE OF FUNDS*

        AF
--------------------------------------------------------------------------------
   5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO
        ITEMS 2(d) or 2(e) [ ]
--------------------------------------------------------------------------------
   6    CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
--------------------------------------------------------------------------------
                 7    SOLE VOTING POWER

                      0
               -----------------------------------------------------------------
NUMBER OF        8    SHARED VOTING POWER
SHARES
BENEFICIALLY          2,047,443
OWNED BY       -----------------------------------------------------------------
EACH             9    SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH           0
               -----------------------------------------------------------------
                 10   SHARED DISPOSITIVE POWER

                      2,047,443
--------------------------------------------------------------------------------
  11    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH PERSON

        2,047,443
--------------------------------------------------------------------------------
  12    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
        [ ]
--------------------------------------------------------------------------------
  13    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        7.6%
--------------------------------------------------------------------------------
  14    TYPE OF REPORTING PERSON*

        IN
--------------------------------------------------------------------------------





                                  SCHEDULE 13D

                                  SCHEDULE 13D

-------------------------------                   ------------------------------
CUSIP No.      559079207                          Page 3 of 10 Pages
-------------------------------                   ------------------------------

--------------------------------------------------------------------------------
   1    NAME OF REPORTING PERSON
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Third Point Management Company L.L.C.          I.D. #13-3922602
--------------------------------------------------------------------------------
   2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                      (a) [ ]
                                                                      (b) [X]
--------------------------------------------------------------------------------
   3    SEC USE ONLY

--------------------------------------------------------------------------------
   4    SOURCE OF FUNDS*

        AF
--------------------------------------------------------------------------------
   5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO
        ITEMS 2(d) or 2(e) [ ]
--------------------------------------------------------------------------------
   6    CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware
--------------------------------------------------------------------------------
                 7    SOLE VOTING POWER

                      0
               -----------------------------------------------------------------
NUMBER OF        8    SHARED VOTING POWER
SHARES
BENEFICIALLY          2,047,443
OWNED BY       -----------------------------------------------------------------
EACH             9    SOLE DISPOSITIVE POWER
REPORTING
PERSON WITH           0
               -----------------------------------------------------------------
                 10   SHARED DISPOSITIVE POWER

                      2,047,443
--------------------------------------------------------------------------------
  11    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH PERSON

        2,047,443
--------------------------------------------------------------------------------
  12    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
        [ ]
--------------------------------------------------------------------------------
  13    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        7.6%
--------------------------------------------------------------------------------
  14    TYPE OF REPORTING PERSON*

        OO
--------------------------------------------------------------------------------





     This Schedule 13D is being filed on behalf of Third Point Management
Company L.L.C., a Delaware limited liability company (the "Management Company"),
and Daniel S. Loeb, an individual ("Mr. Loeb" and, together with the Management
Company, the "Reporting Persons"). This Schedule 13D relates to the Ordinary
Common Stock, par value $0.01 per share, of Magellan Health Services, Inc., a
Delaware corporation (the "Company"). Unless the context otherwise requires,
references herein to the "Common Stock" are to such Ordinary Common Stock of the
Company. The Management Company is the investment manager or adviser to a
variety of hedge funds and managed accounts (such funds and accounts,
collectively, the "Funds"). The Funds directly own the Common Stock to which
this Schedule 13D relates, and the Reporting Persons may be deemed to have
beneficial ownership over such Common Stock by virtue of the authority granted
to them by the Funds to vote and to dispose of the securities held by the Funds,
including the Common Stock.

Item 1. Security and Issuer.

     This statement on Schedule 13D relates to the Common Stock of the Company,
and is being filed pursuant to Rules 13d-1 and 13d-5 under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"). The address of the
principal executive offices of the Company is 6950 Columbia Gateway Drive, Suite
400, Columbia, Maryland 21046.

Item 2. Identity and Background.

     (a) This statement is filed by the Reporting Persons. Daniel S. Loeb is the
managing member of the Management Company and controls the Management Company's
business activities. The Management Company is organized as a limited liability
company under the laws of the State of Delaware.

     (b) The address of the principal business and principal office of the
Management Company and Mr. Loeb is 360 Madison Avenue, 24th Floor, New York, NY
10017.


                                       4



     (c) The principal business of the Management Company is to serve as
investment manager or adviser to the Funds, and to control the investing and
trading in securities of the Funds. The principal business of Mr. Loeb is to act
as the managing member of the Management Company.

     (d) None of the Reporting Persons, nor, to the best of their knowledge, any
of their directors, executive officers, general partners or members has, during
the last five years, been convicted in a criminal proceeding (excluding traffic
violations or similar misdemeanors).

     (e) None of the Reporting Persons, nor, to the best of their knowledge, any
of their directors, executive officers, general partners or members has, during
the last five years, been a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such proceeding
was or is subject to a judgment, decree or final order enjoining future
violations of, or prohibiting or mandating activities subject to, federal or
state securities laws or finding any violation with respect to such laws.

     (f) Mr. Loeb is a United States citizen.

Item 3. Source and Amount of Funds or Other
        Consideration.

     The Funds expended an aggregate of approximately $36,031,963.94 of their
own investment capital to acquire the 2,047,443 shares of Common Stock held by
them (the "Shares"). The Shares were acquired in exchange for certain bonds and
rights held by the Funds in connection with the Company's reorganization under
Chapter 11 of Title 11 of the United States Code.

     The Funds effect purchases of securities primarily through margin accounts
maintained for them with Bear, Stearns Securities Corp. which may extend margin
credit to the Funds as and when required to open or carry positions in the
margin accounts, subject to applicable Federal margin regulations, stock
exchange rules and the firm's credit policies. In such instances, the positions
held in the margin accounts are pledged as collateral security for the repayment
of debit balances in the accounts.


                                       5



Item 4. Purpose of Transaction.

     The purpose of the acquisition of the Shares by the Funds is for
investment. The Reporting Persons may cause the Funds to make further
acquisitions of Common Stock from time to time or to dispose of any or all of
the shares of Common Stock held by the Funds at any time.

     As further detailed in a letter, dated January 13, 2004, from Mr. Loeb as
managing member of the Management Company, to Mr. Steven J. Shulman, the Chief
Executive Officer of the Company, a copy of which is attached hereto as Exhibit
2, the Reporting Persons are optimistic about the Company's future business
prospects.

     The Reporting Persons are engaged in the investment business. In pursuing
this business, the Reporting Persons analyze the operations, capital structure
and markets of companies, including the Company, on a continuous basis through
analysis of documentation and discussions with knowledgeable industry and market
observers and with representatives of such companies (often at the invitation of
management). From time to time, one or more of the Reporting Persons may hold
discussions with third parties or with management of such companies in which the
Reporting Person may suggest or take a position with respect to potential
changes in the operations, management or capital structure of such companies as
a means of enhancing shareholder value. Such suggestions or positions may relate
to one or more of the transactions specified in clauses (a) through (j) of Item
4 of Schedule 13D of the Exchange Act, including, without limitation, such
matters as disposing of or selling all or a portion of the company or acquiring
another company or business, changing operating or marketing strategies,
adopting or not adopting certain types of anti-takeover measures and
restructuring the company's capitalization or dividend policy.

     Except as set forth above, and in the letter attached hereto as Exhibit 2,
the Reporting Persons do not have any present plans or proposals that relate to
or would result in any of the actions required to be described in Item 4 of
Schedule 13D. Each of the Reporting Persons may, at any time, review or
reconsider its position with respect to the Company and formulate plans or
proposals with respect to any of such matters, but has no present intention of
doing so.


                                       6



Item 5. Interest in Securities of the Issuer.

     (a) As of the date of this Schedule 13D, the Management Company
beneficially owns 2,047,443 shares of Common Stock. The Management Company
shares voting and dispositive power over such holdings with Mr. Loeb and with
the Funds. The Shares represent 7.6% of the approximate total of 26.9 million
shares of Common Stock outstanding as reported in Exhibit 2.1 of the Company's
current report on Form 8-K, filed on January 6, 2004. None of the individual
Funds owns a number of shares of Common Stock equal to or greater than 5% of
such total Common Stock outstanding.

     (b) The Management Company and Mr. Loeb share voting and dispositive power
over the 2,047,443 shares of Common Stock held directly by the Funds.

     (c) Schedule A hereto sets forth certain information with respect to
transactions by the Funds, at the direction of the Reporting Persons, in the
Common Stock during the past sixty days.

     All of the transactions set forth on Schedule A were effected directly with
the Company as part of the Company's reorganization.

     Except as set forth above, during the last sixty days there were no
transactions in the Common Stock effected by the Reporting Persons, nor, to the
best of their knowledge, any of their directors, executive officers, general
partners or members.

     (d) Other than the Funds which directly hold the Shares, and except as set
forth in this Item 5, no person is known to have the right to receive or the
power to direct the receipt of dividends from, or the proceeds from the sale of,
the Shares.

     (e) Not applicable.

Item 6. Contracts, Arrangements, Understandings or
        Relationships With Respect to Securities of the
        Issuer.

     Pursuant to Rule 13d-1(k) promulgated under the Exchange Act, the Reporting
Persons have entered into an agreement with respect to the joint filing of this
statement, and any amendment or amendments hereto.


                                       7



     By virtue of the relationships among the Reporting Persons and the Funds,
as described in Item 2, the Reporting Persons and the Funds may be deemed to be
a "group" under the Federal securities laws. Except as otherwise set forth in
this Schedule 13D, each Reporting Person expressly disclaims beneficial
ownership of any of the shares of Common Stock beneficially owned by any other
Reporting Person or the Funds and the filing of this Statement shall not be
construed as an admission, for the purposes of Sections 13(d) and 13(g) or under
any provision of the Exchange Act or the rules promulgated thereunder or for any
other purpose, that any Reporting Person is a beneficial owner of any such
shares.

     Except as set forth herein, there are no contracts, arrangements,
understandings or relationships among the persons named in Item 2 or between
such persons and any other person with respect to any securities of the Company.

Item 7. Material to be Filed as Exhibits.

     1. Joint Filing Agreement, dated as of January 13, 2004, by and between the
Reporting Persons.

     2. Letter from the Management Company to Mr. Steven J. Shulman, Chief
Executive Officer of the Company, dated January 13, 2004.


                                       8



                                   Schedule A
                                   ----------

                   (Transactions by the Funds in Common Stock
                           during the past sixty days)


                                                                 Effective
                                                                 ---------
                                                                 Price Per
                                                                 ---------
Date           Shares Received                                   Share
----           ---------------                                   -----

01/06/04       2,019,217 - equity distribution from bonds        $17.6713
01/06/04       28,226 - equity distribution from rights          $12.3900





                                   SIGNATURES

     After reasonable inquiry and to the best of our knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated: January 13, 2004

                                        THIRD POINT MANAGEMENT
                                        COMPANY L.L.C.



                                        By:  /s/ Daniel S. Loeb
                                             ---------------------------
                                             Name:  Daniel S. Loeb
                                             Title: Managing Member



                                        /s/ Daniel S. Loeb
                                        --------------------------------
                                        Daniel S. Loeb





                         [SIGNATURE PAGE TO SCHEDULE 13D
                                 WITH RESPECT TO
                         MAGELLAN HEALTH SERVICES, INC.]