CMS rates qualified health plans (QHPs) offered through the Marketplaces using the Quality Rating System (QRS), which is based on third-party validated clinical measure data and QHP Enrollee Survey response data. CMS calculates QRS ratings annually using a 5-star scale. QHP issuers contract with HHS-approved survey vendors that independently conduct the QHP Enrollee Survey each year. QRS ratings and QHP Enrollee Survey results may change from one year to the next. For more information, please see CMS’ Health Insurance Marketplace Quality Initiatives website at: http://www.cms.gov/Medicare/Quality-Initiatives-Patient-Assessment-Instruments/QualityInitiativesGenInfo/Health-Insurance-Marketplace-Quality-Initiatives.html.