February 22, 1996



Magellan Health Services, Inc.
3414 Peachtree Road, N.E.
Suite 1400
Atlanta, Georgia  30326

     Re: Form S-3 Registration  Statement relating to 4,000,000 shares of Common
         Stock, par value $.25 per share, of Magellan Health Services, Inc.

Ladies and Gentlemen:

         I have acted as counsel for Magellan Health Services,  Inc., a Delaware
corporation  (the  "Company"),   in  connection  with  the  preparation  of  the
Registration Statement on Form S-3 (the "Registration Statement") filed with the
Securities and Exchange Commission under the Securities Act of 1933, as amended,
relating  to the  offering  from  time to time of up to  4,000,000  shares  (the
"Shares")  of Common  Stock,  par  value  $.25 per  share,  of the  Company,  by
Rainwater-Magellan Holdings, L.P.

         As  such  counsel,  I have  examined  and  relied  upon  such  records,
documents, certificates and other instruments as in my judgment are necessary or
appropriate  to form the basis for the opinions  hereinafter  set forth.  In all
such  examinations,  I have assumed the  genuineness  of  signatures on original
documents and the conformity to such original  documents of all copies submitted
to me as certified,  conformed or photographic copies, and as to certificates of
public officials,  I have assumed the same to have been properly given and to be
accurate.

         Based upon the foregoing, I am of the opinion that the Shares have been
duly authorized and validly issued and are fully paid and nonassessable.

         I  consent  to  the  filing  of  this  opinion  as an  exhibit  to  the
Registration  Statement  and to the  reference  to me under the  caption  "Legal
Matters" in the Prospectus that forms a part of the Registration Statement.

                                        Very truly yours,


                                        /s/ Steve J. Davis
                                        ----------------------------------------
                                        Steve J. Davis
                                        Executive Vice President, Administrative
                                        Services and General Counsel