Amends 10 U.S.C. 1074g by (1) adding a new subparagraph (D) to subsection (a)(9) permitting eligible covered beneficiaries beginning October 1, 2026 to elect to receive non-generic prescription maintenance medications through any means described in paragraph (2)(E); (2) redesignating existing subsections (i) and (j) as (j) and (k); and (3) inserting a new subsection (i) establishing PBM reimbursement standards, prohibiting contractor-imposed fees on TRICARE retail pharmacies, and requiring annual Comptroller General audits and contractor cooperation.