2025 Medicare Advantage and Part D Star Ratings | CMS CMS publishes the Medicare Advantage (Medicare Part C) and Medicare Part D Star Ratings each year to measure the quality of health and prescription drug services received by consumers enrolled in MA and Part D prescription drug plans (PDPs or Part D plans)
Star Ratings 201 - The Calculation - Baltimore Health Analytics The first task is to collect scores for each of the measures from each of the plans and convert the numeric scores into 1, 2, 3, 4 or 5 Stars The second task is to take the individual measure stars and calculate the weighted average and round to get a final Star Rating
Medicare Star Ratings Explained: How to Compare Plans Learn how Medicare Star Ratings help you evaluate Medicare Advantage and Part D plans, understand quality scores, and use special enrollment periods to switch plans
Medicare Advantage Star Ratings Explained (2026 Guide) CMS rates every Medicare Advantage plan 1–5 stars Here's what the ratings actually measure, why they matter for your coverage, and how to use them to compare plans
eCFR :: 42 CFR 423. 186 -- Calculation of Star Ratings. The rating-specific HEI will then be calculated as the weighted sum of points across all measures included in the index using the Star Ratings measure weight for each measure divided by the weighted sum of the number of eligible measures for the given contract
Health Outcomes Survey (HOS) and Medicare Star Ratings CMS rates the relative quality of service and care provided by Medicare Advantage Organizations (MAOs) based upon a five-star rating scale that utilizes the contract level HOS measures combined with other measurement results
MY2026 Star measures and weights Updated: November 2025 The information supplied here represents anticipated MY 2026 measures and weights based on Plan Preview, September 2025
Medicare Advantage Star Ratings Explained - AARP Medicare Advantage (MA) — the private plan alternative to traditional Medicare — uses a star-based rating system to describe the quality of Medicare’s private plans MA Star Ratings were originally intended to help Medicare enrollees compare and choose between available MA plans