Medicare Mental Health Modernization Act of 2003

Medicare Mental Health Modernization Act of 2003 - Amends title XVIII (Medicare) of the Social Security Act (SSA) to provide for: (1) elimination of the lifetime limit on inpatient mental health services; (2) parity in treatment for outpatient mental health services; (3) coverage of intensive residential services under Medicare part A (Hospital Insurance) and of intensive outpatient services under Medicare part B (Supplementary Medical Insurance); (4) exclusion of clinical social worker services from coverage under the Medicare skilled nursing facility prospective payment system; and (5) coverage of marriage and family therapist services and mental health counselor services under Medicare.