Medicare Part D Base Premium Projected at $41.33/Month in 2027, Up from $36 Average in 2026

CMS projects the 2027 Medicare Part D base beneficiary premium at $41.33 per month, up from 2026's $36 average stand-alone PDP premium. The jump reflects IRA-driven benefit redesign costs — including the $2,100 out-of-pocket cap — flowing through to plan bids. Per MarketWatch, spending on high-cost drugs like GLP-1s adds pressure. The 2026 premium dip appears transitional.