EXHIBIT 3.104

                                     BYLAWS

                                       OF

                  MESILLA VALLEY MENTAL HEALTH ASSOCIATES, INC.

         1.       Annual Meeting of the Shareholders. The annual meeting of
shareholders for the election of directors and such other purposes as may be set
forth in the notice of meeting shall be held at the time and place, within or
outside the State of New Mexico, fixed by the Board of Directors in a manner
consistent with the general corporation statute of the State New Mexico.

         2.       Special Meetings of the Shareholders. Special meetings of the
shareholders may be held at any place within or outside the State of New Mexico
upon call of the Board of Directors, the Chairman of the Board of Directors, if
any, the President, or the holders often percent (10%) of the issued and
outstanding shares of capital stock entitled to vote.

         3.       Transfer of Stock. The capital stock of the Corporation shall
be transferred on the books of the Corporation by surrender of properly endorsed
certificates therefore by the holders thereof or their duly authorized
attorneys-in-fact.

         4.       Directors. The business of the Corporation shall be managed by
a Board of Directors consisting of not less than two nor more than seven
members, such number of directors within such range to be fixed by action of the
board of directors. The range of size for the board may be increased or
decreased by the shareholders. Directors may be removed for or without cause by
the shareholders. Vacancies in the board of directors, whether resulting from an
increase in the number of directors, the removal of directors for or without
cause or otherwise, may be filled by a vote of a majority of the directors then
in office, although less than a quorum. Directors may be removed for or without
cause by the shareholders.

         5.       Meetings of the Board of Directors. Regular meetings of the
board of directors may be held without notice of the date, time, place or
purpose of the meeting (a) at the location of the annual meeting of shareholders
immediately after the meeting in each year and (b) at such times and at such
places within or outside the State of New Mexico as shall be fixed by the board
of directors, in a manner consistent with the general corporation statute of the
State New Mexico. Special meetings of the board of directors may be held at any
place within or outside the State of New Mexico upon call of the chairman of the
board of directors, if any, the president or a majority of the directors then in
office, which call shall set forth the date, time and place of meeting and, if
required by law, the purpose of the meeting. Written, oral, or any other mode of
notice of the date, time and place of meeting shall be given for special
meetings in sufficient time, which need not exceed the minimum time allowed by
the general corporation statute of the State New Mexico, for the convenient
assembly of the directors. A majority of the number of directors of the
Corporation then in office, but in no event less than 51% of the number of
directors the Corporation would have if there were no vacancies in the board of
directors, shall constitute a quorum, and the vote of a majority of the
directors present at the time of the vote, if a quorum is present, shall be the
act of the board of directors.



         6.       Officers. The Board of Directors shall elect a President and a
Secretary, such other officers required by the general corporation statute of
the State New Mexico and such other officers as it may deem appropriate. The
President, Secretary and any other officer so appointed by the Board of
Directors are authorized to execute certificates representing shares of the
Corporation's capital stock. Persons may hold more than one office, except that
no person may serve as both President and Secretary. If the Corporation has only
one shareholder, such shareholder may hold the offices of President and
Secretary. Officers shall have the authority and responsibilities given them by
the Board of Directors, and each officer shall hold office until his or her
successor is elected and qualified, unless a different term is specified by the
Board of Directors.

         7.       Committees. By resolution adopted by the greater of (i) a
majority of the directors of the Corporation then in office when the action is
taken or (ii) the number of directors required by the Articles of Incorporation
or bylaws to take action, the directors may designate from among their number
one or more directors to constitute an executive committee and other committees,
each of which, to the extent permitted by law, shall have the authority granted
it by the board of directors.

         8.       Amendment of Bylaws. The Bylaws of the Corporation may be
amended or repealed, and additional Bylaws may be adopted, by action of the
Board of Directors or of the shareholders, but any Bylaws adopted by the Board
of Directors may be amended or repealed by the shareholders.

Adopted: January 1,2003