SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G
                                (RULE 13d - 102)

    INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO 13d-1(b), 
            (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d

                                (Amendment No.)*
Psychiatric Solutions, Inc.
------------------------------                        
(Name of Issuer)

Common Stock                                                    
------------------------------ 
(Title of Class of Securities)

         74439H108
------------------------------  
(CUSIP Number)

         May 13, 2005
------------------------------                        
(Date of Event which Requires Filing of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ ]      Rule 13d-1(b)
[x]      Rule 13d-1(c)
[ ]      Rule 13d-1(d)

*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).


                                               
1.       NAMES OF REPORTING PERSONS
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                  Amaranth LLC

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

         (a)      [x]
         (b)      [ ]

3.       SEC USE ONLY

4.       CITIZENSHIP OR PLACE OF ORGANIZATION

                  Cayman Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

5.       SOLE VOTING POWER

                  0

6.       SHARED VOTING POWER

                  1,046,884
         ----------------------                                  

7.       SOLE DISPOSITIVE POWER

                  0

8.       SHARED DISPOSITIVE POWER

                  1,046,884                                  
         ---------------------- 

9.       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                  See 6 and 8 above.

10.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
         EXCLUDES CERTAIN SHARES*   [ ]

11.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                  5.1%                               
         ---------------------- 

12.      TYPE OF REPORTING PERSON*

                  CO


1.       NAMES OF REPORTING PERSONS
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                  Amaranth Global Equities Master Fund Limited

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

         (a)      [x]
         (b)      [ ]

3.       SEC USE ONLY

4.       CITIZENSHIP OR PLACE OF ORGANIZATION

                  Cayman Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

5.       SOLE VOTING POWER

                  0

6.       SHARED VOTING POWER

                  1,046,884                                  
         ----------------------
 
7.       SOLE DISPOSITIVE POWER

                  0

8.       SHARED DISPOSITIVE POWER

                  1,046,884                                  
         ----------------------

9.       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                  See 6 and 8 above.

10.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
         EXCLUDES CERTAIN SHARES*   [ ]

11.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                  5.1%                               
         ----------------------

12.      TYPE OF REPORTING PERSON*

                  CO


1.       NAMES OF REPORTING PERSONS
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                  Amaranth Advisors L.L.C.

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

         (a)      [x]
         (b)      [ ]

3.       SEC USE ONLY

4.       CITIZENSHIP OR PLACE OF ORGANIZATION

                  Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

5.       SOLE VOTING POWER

                  0

6.       SHARED VOTING POWER

                  1,046,884                          
         ----------------------

7.       SOLE DISPOSITIVE POWER

                  0

8.       SHARED DISPOSITIVE POWER

                  1,046,884                           
         ----------------------

9.       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                  See 6 and 8 above.

10.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
         EXCLUDES CERTAIN SHARES*   [ ]

11.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                  5.1%                               
         ----------------------

12.      TYPE OF REPORTING PERSON*

                  IA


1.       NAMES OF REPORTING PERSONS
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                  Nicholas M. Maounis

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

         (a)      [x]
         (b)      [ ]

3.       SEC USE ONLY

4.       CITIZENSHIP OR PLACE OF ORGANIZATION

                  United States

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

5.       SOLE VOTING POWER

                  0

6.       SHARED VOTING POWER

                  1,046,884                                  
         ----------------------
7.       SOLE DISPOSITIVE POWER

                  0

8.       SHARED DISPOSITIVE POWER

                  1,046,884                                  
         ----------------------
9.       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                  See 6 and 8 above.

10.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
         EXCLUDES CERTAIN SHARES*   [ ]

11.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                  5.1%                               
         ----------------------
12.      TYPE OF REPORTING PERSON*

                  IN, HC



ITEM 1(a).        Name of Issuer:

         Psychiatric Solutions, Inc.                                   
         ---------------------------

Item 1(b).        Address of Issuer's Principal Executive Offices:

840 Crescent Drive
--------------------
Suite 460
--------------------
Franklin, TN 37067
--------------------
            
Item 2(a).        Name of Persons Filing:
Item 2(b).        Address of Principal Business Office or, if None, Residence:
Item 2(c).        Citizenship:

         Amaranth LLC
         c/o Amaranth Advisors L.L.C.
         One American Lane
         Greenwich, Connecticut 06831
         Cayman Islands company

         Amaranth Global Equities Master Fund Limited
         c/o Amaranth Advisors L.L.C.
         One American Lane
         Greenwich, Connecticut 06831
         Cayman Islands company

         Amaranth Advisors L.L.C.
         One American Lane
         Greenwich, Connecticut 06831
         Delaware limited liability company

         Nicholas M. Maounis
         c/o Amaranth Advisors L.L.C.
         One American Lane
         Greenwich, Connecticut 06831
         U.S. Citizen

Amaranth  Advisors  L.L.C.  is the  trading  advisor  for each of  Amaranth  LLC
("Amaranth") and Amaranth Global Equities Master Fund Limited ("Global") and has
been granted  investment  discretion over portfolio  investments,  including the
Common Stock (as defined below),  held by each of them.  Maounis is the managing
member of  Amaranth  Advisors  L.L.C.  and may,  by virtue  of his  position  as
managing  member,  be deemed to have power to direct the vote and disposition of
the Common Stock held for each of Amaranth and Global.


Item 2(d).        Title of Class of Securities

                  Common Stock, $.01 Par Value ("Common Stock")
                  ---------------------------------------------


Item 2(e).        CUSIP Number:     74439H108                 
                                --------------------

Item 3. If This  Statement is Filed  Pursuant to Rule  13d-1(b),  or 13d-2(b) or
       (c), Check Whether the Person Filing is a:

          (a) [ ] Broker or dealer  registered  under Section 15 of the Exchange
                  Act.

          (b) [ ] Bank as defined in Section 3(a)(6) of the Exchange Act.

          (c) [ ] Insurance  company defined in Section 3(a)(19) of the Exchange
                  Act.

          (d) [ ] Investment  company  registered  under  Section  8  of  the
                  Investment Company Act.

          (e) [ ] An   investment   adviser   in   accordance   with   Rule
                  13d-1(b)(1)(ii)(E).

          (f) [ ] An employee  benefit plan or endowment fund in accordance with
                  Rule 13d-1(b)(1)(ii)(F).

          (g) [ ] A parent holding  company or control person in accordance with
                  Rule 13d-1(b)(1)(ii)(G).

          (h) [ ] A  savings  association  as  defined  in  Section  3(b) of the
                  Federal Deposit Insurance Act.

          (i) [ ] A church  plan  that is  excluded  from the  definition  of an
                  investment  company under Section  3(c)(14) of the Investment
                  Company Act;

          (j) [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

If this statement is filed pursuant to Rule 13d-1(c), check this box [x]

Item 4.   Ownership.

          Provide the following  information  regarding the aggregate number and
     percentage of the class of securities of the issuer identified in Item 1.

(a)       Amount beneficially owned:

          The  Reporting  Persons  beneficially  own  1,046,884  shares  of  the
     Issuer's  Common Stock,  which are  comprised of (i) 895,784  shares Common
     Stock, and (ii) listed options that can be exercised into 151,100 shares of
     Common Stock.


(b)       Percent of class:

                  5.1%
             ----------------              



(c)       Number of shares as to which such person has:

                   (i)  Sole power to vote or direct the vote

                           0

                  (ii)  Shared power to vote or to direct the vote

                           See Item 4(a).

                  (iii)  Sole power to dispose or to direct the disposition of

                           0

                  (iv)  Shared power to dispose or to direct the disposition of

                        See Item 4(a).


Item 5.   Ownership of Five Percent or Less of a Class.

          If this  statement  is being  filed to report  the fact that as of the
          date hereof the  Reporting  Persons  have ceased to be the  beneficial
          owner of more than five percent of the class of securities,  check the
          following [ ]. Not applicable.

Item 6.   Ownership of More than Five Percent on Behalf of Another Person.

          Shareholders  of Amaranth  and Global  indirectly  participate  in the
          receipt of dividends  from,  and proceeds from the sale of, the Common
          Stock held for the account of Amaranth and Global.

Item 7.   Identification  and Classification of the Subsidiary Which Acquired 
          the Security Being Reported on by the Parent Holding Company.

          See Exhibit B.

Item 8.   Identification and Classification of Members of the Group.

          See Item 2 in lieu of an Exhibit.

Item 9.   Notice of Dissolution of Group.

          Not applicable.



Item 10.  Certification.

     By  signing  below  the  undersigned  certifies  that,  to the  best of its
     knowledge and belief,  the  securities  referred to above were not acquired
     and are not held for the  purpose  of or with the  effect  of  changing  or
     influencing  the  control  of the  issuer  of the  securities  and were not
     acquired and are not held in  connection  with or as a  participant  in any
     transaction having that purpose or effect.



                                   SIGNATURES

          After reasonable  inquiry and to the best of its knowledge and belief,
     each of the undersigned  certifies that the information  with respect to it
     set forth in this statement is true, complete, and correct.


Dated:   May 23, 2005
        --------------------               

          AMARANTH LLC,
                   by Amaranth Advisors L.L.C., as Trading Advisor

                   By:  /s/Nicholas M. Maounis
                        -----------------------
                        Nicholas M. Maounis,
                        Managing Member
         
          AMARANTH GLOBAL EQUITIES MASTER FUND LIMITED,
                   by Amaranth Advisors L.L.C., as Trading Advisor

                   By:  /s/Nicholas M. Maounis
                        ----------------------- 
                        Nicholas M. Maounis,
                        Managing Member

          AMARANTH ADVISORS L.L.C.,

                   By:  /s/Nicholas M. Maounis
                        ----------------------- 
                        Nicholas M. Maounis,
                        Managing Member

          NICHOLAS M. MAOUNIS

                        /s/Nicholas M. Maounis
                        -----------------------
                        Nicholas M. Maounis


                                    EXHIBIT A
                             JOINT FILING AGREEMENT

          The undersigned hereby agree that the statement on Schedule 13G signed
     by each  of the  undersigned  shall  be,  filed  on  behalf  of each of the
     undersigned  pursuant  to and in  accordance  with the  provisions  of Rule
     13d-1(k) under the Securities Exchange Act of 1934, as amended.

Dated:    May 23, 2005              

          AMARANTH LLC,
                   by Amaranth Advisors L.L.C., as Trading Advisor

                   By:  /s/Nicholas M. Maounis
                        -----------------------
                        Nicholas M. Maounis,
                        Managing Member

          AMARANTH GLOBAL EQUITIES MASTER FUND LIMITED,
                   by Amaranth Advisors L.L.C., as Trading Advisor

                   By:  /s/Nicholas M. Maounis
                        -----------------------
                        Nicholas M. Maounis,
                        Managing Member

          AMARANTH ADVISORS L.L.C.,

                   By:  /s/Nicholas M. Maounis
                        ----------------------- 
                        Nicholas M. Maounis,
                        Managing Member


          NICHOLAS M. MAOUNIS

                        /s/Nicholas M. Maounis
                        ----------------------- 
                        Nicholas M. Maounis




                                    EXHIBIT B
                                  SUBSIDIARIES



     Amaranth  LLC  and  Amaranth  Global  Equities  Master  Fund  Limited  hold
1,036,100 shares of Common Stock  beneficially owned by them through their joint
subsidiary, Amaranth Helix Limited, a Cayman Islands company.