§ 411.100 Basis and scope.

(a) Statutory basis. (1) Section 1862(b) of the Act provides in part that Medicare is secondary payer, under specified conditions, for services covered under any of the following:

(i) Group health plans of employers that employ at least 20 employees and that cover Medicare beneficiaries age 65 or older who are covered under the plan by virtue of the individual's current employment status with an employer or the current employment status of a spouse of any age. (Section 1862(b)(1)(A))

(ii) Group health plans (without regard to the number of individuals employed and irrespective of current employment status) that cover individuals who have ESRD. Except as provided in § 411.163, group health plans are always primary payers throughout the first 18 months of ESRD-based Medicare eligibility or entitlement. (Section 1862(b)(1)(C))