26 CFR § 54.9801-4 - Rules relating to creditable coverage.
(a) General rules -
(1) Creditable coverage. For purposes of this section, except as provided in paragraph (a)(2) of this section, the term creditable coverage means coverage of an individual under any of the following:
(i) A group health plan as defined in § 54.9831-1(a).
(ii) Health insurance coverage as defined in § 54.9801-2 (whether or not the entity offering the coverage is subject to Chapter 100 of Subtitle K, and without regard to whether the coverage is offered in the group market, the individual market, or otherwise).
(iii) Part A or B of title XVIII of the Social Security Act (Medicare).
(iv) Title XIX of the Social Security Act (Medicaid), other than coverage consisting solely of benefits under section 1928 of the Social Security Act (the program for distribution of pediatric vaccines).
(v) Title 10 U.S.C. Chapter 55 (medical and dental care for members and certain former members of the uniformed services, and for their dependents; for purposes of title 10 U.S.C. Chapter 55, uniformed services means the armed forces and the Commissioned Corps of the National Oceanic and Atmospheric Administration and of the Public Health Service).
(vi) A medical care program of the Indian Health Service or of a tribal organization.
(vii) A State health benefits risk pool. For purposes of this section, a State health benefits risk pool means -
(A) An organization qualifying under section 501(c)(26);
(B) A qualified high risk pool described in section 2744(c)(2) of the PHS Act; or
(C) Any other arrangement sponsored by a State, the membership composition of which is specified by the State and which is established and maintained primarily to provide health coverage for individuals who are residents of such State and who, by reason of the existence or history of a medical condition -
(2) Are able to acquire such coverage only at a rate which is substantially in excess of the rate for such coverage through the membership organization.
(ix) A public health plan. For purposes of this section, a public health plan means any plan established or maintained by a State, the U.S. government, a foreign country, or any political subdivision of a State, the U.S. government, or a foreign country that provides health coverage to individuals who are enrolled in the plan.
(xi) Title XXI of the Social Security Act (State Children's Health Insurance Program).
(b) Counting creditable coverage rules superseded by prohibition on preexisting condition exclusion.See section 2704 of the Public Health Service Act, incorporated into section 9815 of the Code, and its implementing regulations for rules prohibiting the imposition of a preexisting condition exclusion.