Medicare Star Ratings are annual CMS ratings, on a 1-to-5 scale, for Medicare Advantage and Part D prescription drug plans. They summarize dozens of individual measures spanning clinical quality (many drawn from HEDIS), member experience (from CAHPS surveys), medication adherence, and customer service.

The ratings carry real money. Plans that reach 4 stars or higher qualify for quality bonus payments and can reinvest in richer benefits, and a higher public rating drives enrollment during the Annual Enrollment Period. A drop of half a star can move millions of dollars, so plans manage the underlying measures all year.

The measures that move stars are, at bottom, completed patient actions: closed screening gaps, controlled chronic conditions, and refilled prescriptions. Rivvi runs the outreach behind those, care-gap recalls, wellness-visit booking, and medication-adherence programs, as real conversations that book and confirm, then write the result back.