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1 National Committee for Quality Assurance (NCQA)'s Medicare Health Insurance Plan Ratings 2015-2016. Blue Cross Blue Shield of Massachusetts' Medicare Advantage PPO Plan and Medicare Advantage HMO Plan are rated 4.5 out of 5 overall nationally. NCQA is not affiliated with Blue Cross Blue Shield of Massachusetts or CMS, nor is the award given or endorsed by Medicare. Our official CMS Star Ratings can be found at www.medicare.gov. Membership numbers based on Centers for Medicare and Medicaid Services' (CMS) and Division of Insurance (DOI) data. Medicare evaluates plans based on a 5-Star rating system. Star Ratings are calculated each year and may change from one year to the next. Star Ratings can be found at www.medicare.gov. Methodology for the 2015 Best Medicare Advantage Plans: U.S. News used data from the Centers for Medicare & Medicaid Services, including its rating of each Medicare Advantage plan. For an insurer to make the U.S. News list, its Medicare Advantage plans available in a given state had to earn an average rating of at least 4.5 out of 5 stars, and all its plans in the state had to earn at least 3 stars. U.S. News is not affiliated with CMS, nor is the award given by Medicare. Methodology for the 2015 Best Medicare Part D Plans: U.S. News used data from the Centers for Medicare & Medicaid Services, including its rating of each Medicare Part D plan. For an insurer to make the U.S. News list, its Medicare Part D plans available in a given state had to earn an average rating of at least 4.5 out of 5 Stars, and all its plans in the state had to earn at least 3 Stars. U.S. News is not affiliated with CMS, nor is the award given by Medicare.