42 CFR §412.422

1. (a)Method of Payment.
   1. (1)Under the inpatient psychiatric facility prospective payment system, inpatient psychiatric facilities receive a predetermined Federal per diem base rate for inpatient hospital services furnished to Medicare Part A fee-for-service beneficiaries.
   2. (2)The Federal per diem payment amount is based on the Federal per diem base rate plus applicable adjustments as specified in § 412.424.
   3. (3)During the transition period, payment is based on a blend of the Federal per diem payment amount as specified in § 412.424, and the facility-specific payment rate as specified in § 412.426.
2. (b)Payment in full.
   1. (1)The payment made under this subpart represents payment in full (subject to applicable deductibles and coinsurance as specified in subpart G of part 409 of this chapter) for inpatient operating and capital-related costs associated with furnishing Medicare covered services in an inpatient psychiatric facility, but not the cost of an approved medical education program as specified in § 413.75 through § 413.85 of this chapter.
   2. (2)In addition to the Federal per diem payment amounts, inpatient psychiatric facilities receive payment for bad debts of Medicare beneficiaries, as specified in § 413.89 of this chapter.