EXHIBIT B JOINT FILING AGREEMENT The undersigned hereby agree that Amendment No. 1 to the statement on Schedule 13D with respect to the shares of Common Stock of Northstar Health Services, Inc., dated February 6, 1997, and any further amendments...

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                                    EXHIBIT B


                            JOINT FILING AGREEMENT


                  The  undersigned  hereby  agree  that  Amendment  No. 1 to
the statement  on  Schedule  13D with  respect  to the  shares  of  Common
Stock of Northstar  Health  Services,  Inc.,  dated  February  6, 1997,  and
any  further amendments thereto signed by each of the undersigned shall be
filed on behalf of each of them pursuant to and in accordance  with the
provisions of Rule 13d-1(f) under the Securities Exchange Act of 1934.


Date:  February 6, 1997        XXXXXX X. XXXXXX



                               /s/ Xxxxxx X. Xxxxxx
                               Xxxxxx X. Xxxxxx



Date:  February 6, 1997        COMMONWEALTH ASSOCIATES, L.P.

                               By:  Commonwealth Associates Management
                                      Company, Inc., its general partner


                               By:  /s/ Xxxxx Xxxxxxxx
                                   Name:  Xxxxx Xxxxxxxx
                                   Title: Chief Operating Officer


                               By:  /s/ Xxxxxx Xxxxx
                                   Name:  Xxxxxx Xxxxx
                                   Title: Chief Financial Officer