‘‘(4) PAYMENTS UNDER NATIONAL HEALTH SERVICE CORPS LOAN REPAYMENT PROGRAM AND CERTAIN STATE LOAN REPAYMENT PROGRAMS.—In the case of an individual, gross income shall not include any amount received under section 338B(g) of the Public Health Service Act, under a State program described in section 338I of such Act, or under any other State loan repayment or loan forgiveness program that is intended to provide for the increased availability of health care services in underserved or health professional shortage areas (as determined by such State).’’