42 CFR § 447.271
Upper limits based on customary charges
June 11, 2020
(a) Except as provided in paragraph (b) of this section, the agency may not pay a provider more for inpatient hospital services under Medicaid than the provider's customary charges to the general public for the services.
(b) The agency may pay a public provider that provides services free or at a nominal charge at the same rate that would be used if the provider charges were equal to or greater than its costs.
[75 FR 73975, Nov. 30, 2010]