Primary Care Promotion Act of 1997 - Amends title XVIII (Medicare) of the Social Security Act with respect to direct graduate medical education for residents enrolled in combined approved primary care medical residency training programs. Provides for full-time-equivalent resident reimbursement for an additional year beyond the minimum number of years of formal training required to satisfy the requirements for initial board eligibility in the longest of the individual programs. Declares that a resident enrolled in a combined medical residency training program that includes an obstetrics and gynecology program qualifies for the period of board eligibility under this Act if the other programs such resident combines with such obstetrics and gynecology program are for training a primary care resident.