(c) "Creditable coverage" means, with respect to an individual, coverage of the individual after June 30, 1996, under any of the following, other than coverage consisting solely of excepted benefits:
- (1) A group health plan;
- (2) A health benefit plan;
- (3) Medicare Part A or Part B, 42 U. S. C. §1395 et seq.; Medicaid, 42 U. S. C. §1396a et seq. (other than coverage consisting solely of benefits under Section 1928 of the Social Security Act); Civilian Health and Medical Program of the Uniformed Services (CHAMPUS), 10 U. S. C., Chapter 55; and a medical care program of the Indian Health Service or of a tribal organization;
- (4) A health benefits risk pool sponsored by any state of the United States or by the District of Columbia; a health plan offered under 5 U. S. C., chapter 89; a public health plan as defined in regulations promulgated by the federal secretary of health and human services; or a health benefit plan as defined in the Peace Corps Act, 22 U. S. C. §2504(e).