How did Medicare Part D enrollment and premiums change in 2026?

In 2026, Medicare Part D enrollment reached 56 million, split between 24.9 million in stand‑alone PDPs and 31.4 million in MA‑PDs. PDP premiums fell slightly from $39 to $36, while MA‑PD premiums rose from $7 to $8, reflecting growing cost‑sharing and widening gaps between plan types.