42 C.F.R. § 411.30 Effect of primary payment on benefit utilization and deductibles.
Title 42 - Public Health
(a) Benefit utilization. Inpatient psychiatric hospital and SNF care that is paid for by a primary payer is not counted against the number of inpatient care days available to the beneficiary under Medicare Part A. (b) Deductibles. Expenses for Medicare covered services that are paid for by primary payers are credited toward the Medicare Part A and Part B deductibles.
Title 42: Public Health
PART 411—EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT
Subpart B—Insurance Coverage That Limits Medicare Payment: General Provisions
§ 411.30 Effect of primary payment on benefit utilization and deductibles.