The Centers for Medicare & Medicaid Services has awarded five-star quality ratings to 21 Medicare Advantage-Part D plans and 28 contracts in total when Part D plans and cost contracts are included, for a year-over-year increase of five contracts.

Kaiser Foundation and UnitedHealth Group led the quality ratings, with Kaiser Foundation having six health plans that received the high-performance indicator. Four UnitedHealth Group plans attained five stars, three of which never had received a five-star rating in the past.

The other 11 five-star health plans came from University of Wisconsin Hospitals and Clinics Authority — which had two high-scoring plans — Tufts Health Plan, Kelsey-Seybold Medical Group, Humana, Health Partners, Capital District Physicians’ Health Plan, Cigna, Anthem, Martin’s Point Health Care and HealthNow New York.