In September, the National Committee for Quality Assurance released its 2018 Health Insurance Plan Ratings showing how health insurance plans perform in the areas of consumer satisfaction, illness prevention and treatment. In the report, NCQA studied some 1,500 health plans and rated 1,040, including 445 private or commercial plans, 418 Medicare Advantage plans, and 177 Medicaid plans. NCQA’s rating system is similar to the star ratings system that the federal Centers for Medicare and Medicaid Services uses to rate Medicare Advantage plans. For information on how NCQA calculates its ratings, see this explanation of its methodology.