CMS WISeR Model – AI-Assisted Medicare Prior Authorization

Current understanding

The Centers for Medicare & Medicaid Services’ Wasteful and Inappropriate Services Reduction (WISeR) Model requires third-party contractors to use AI or enhanced technology to perform prior authorization review for selected traditional Medicare services in six pilot states, with contractor compensation tied to savings. A Senate joint resolution of disapproval under the Congressional Review Act (chapter 8 of title 5) sought to nullify the rule but was rejected 46–50, allowing the model to proceed. The episode is one of the first congressional CRA votes specifically targeting a federal use of AI in a benefits-adjudication context.

Evidence log

• 2026-05-19 — Providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Centers for Medicare & Medicaid Services of the Department of Health and Human Services relating to “Medicare Program; Implementation of Prior Authorization for Select Services for the Wasteful and Inappropriate Services Reduction (WISeR) Model”.: 2025 — Senate joint resolution introduced under the Congressional Review Act (chapter 8 of title 5) to disapprove the CMS WISeR Model rule, which requires third-party contractors using AI/enhanced technology to perform prior authorization on select Medicare services in six states under a shared-savings payment structure. (novelty: 3)
• 2026-07-16 — A joint resolution providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Centers for Medicare & Medicaid Services of the Department of Health and Human Services relating to “Medicare Program; Implementation of Prior Authorization for Select Services for the Wasteful and Inappropriate Services Reduction (WISeR) Model”.: cross-connection with right-to-override-act: Both address AI in healthcare decision-making: WISeR embeds AI in Medicare coverage prior authorization, while the Right to Override Act would guarantee clinicians statutory authority to override AI clinical decision support — complementary payer-side and clinician-side governance of medical AI. (novelty: 3)

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