42 C.F.R. § 411.52 : Public Health — CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES — MEDICARE PROGRAM — EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT — LIMITATIONS ON MEDICARE PAYMENT FOR SERVICES COVERED UNDER LIABILITY OR NO-FAULT INSURANCE — Basis for conditional Medicare payment in liability cases

(a) A conditional Medicare payment may be made in liability cases under either of the following circumstances:
(1) The beneficiary has filed a proper claim for liability insurance benefits but the intermediary or carrier determines that the liability insurer will not pay promptly for any reason other than the circumstances described in §411.32(a)(1). This includes cases in which the liability insurance carrier has denied the claim.
(2) The beneficiary has not filed a claim for liability insurance benefits.
(b) Any conditional payment that CMS makes is conditioned on reimbursement to CMS in accordance with subpart B of this part.

42 C.F.R. §411.52

71 FR 9470, 2/24/2006