42 CFR § 411.400 - Payment for custodial care and services not reasonable and necessary.
(a) Conditions for payment. Notwithstanding the exclusions set forth in § 411.15 (g) and (k). Medicare pays for “custodial care” and “services not reasonable and necessary” if the following conditions are met:
(1) The services were funished by a provider or by a practitioner or supplier that had accepted assignment of benefits for those services.
(b) Time limits on payment -
(1) Basic rule. Except as provided in paragraph (b)(2) of this section, payment may not be made for inpatient hospital care, posthospital SNF care, or home health services furnished after the earlier of the following:
(2) Exception. Payment may be made for services furnished during the first day after the limit established in paragraph (b)(1) of this section, if the QIO or the intermediary determines that the additional period of one day is necessary for planning post-discharge care. It the QIO or the intermediary determines that yet another day is necessary for planning post-discharge care, payment may be made for services furnished during the second day after the limit established in paragraph (b)(1) of this section.
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