Medicare in 2026 will see significant changes: Part B premiums and deductibles will rise sharply, and Part D deductibles will increase. A $2,100 annual out-of-pocket drug cost cap will provide relief. Negotiated prices for 10 high-cost drugs will begin, but Medicare Advantage plans will shrink, with fewer supplemental benefits. Network and formulary changes may affect providers and medications. New prior authorization rules will be tested in six states.