As required by the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023 NDAA-23 this document proposes to reduce financial harm to civilians who are not covered beneficiaries of the Military Health System MHS and who receive healthcare services at DoD military medical treatment facilities MTF. The rulemaking once finalized will implement the MHS Modified Payment and Waiver Program MPWP through which the DoD will apply a sliding fee scale andor a catastrophic fee waiver to medical invoices of certain non-beneficiaries and will accept payments from health insurers of non-beneficiaries as full payment except for copays coinsurance deductibles nominal fees and non-covered services.