The Secretary of the Department of Health and Human Services (HHS) hereby issues this final rule with comment period to implement a methodology and payment rates for the Indian Health Service (IHS) Purchased/Referred Care (PRC), formerly known as the Contract Health Services (CHS), to apply Medicare payment methodologies to all physician and other health care professional services and non-hospital-based services. Specifically, it will allow the health programs operated by IHS, Tribes, Tribal organizations, and urban Indian organizations (collectively, I/T/U programs) to negotiate or pay non-I/T/U providers based on the applicable Medicare fee schedule, prospective payment system, Medicare Rate, or in the event of a Medicare waiver, the payment amount will be calculated in accordance with such waiver; the amount negotiated by a repricing agent, if applicable; or the provider or supplier's most favored customer (MFC) rate. This final rule will establish payment rates that are consistent across Federal health care programs, align payment with inpatient services, and enable the I/T/U to expand beneficiary access to medical care. A comment period is included, in part, to address Tribal stakeholder concerns about the opportunity for meaningful consultation on the rule's impact on Tribal health programs.