Compare the prices (monthly premium average cost) for prescription drug coverage through Medicare (medicare.gov) and see which plans have higher ratings. Uses a 5-star quality rating system that includes member satisfaction survey reports. Part D plans.
USnews.com lists Best Medicare Part D (drug) health plan rankings for 2020. Just 12 companies had plans that earned on average, 4.5 or 5 stars from Medicare for Part D (drug) coverage. Eleven companies are some form of Blue Cross drug plan, the other is WPS Health Insurance in Wisconsin. Uses the CMS Star Ratings.
Theoretically, consumers should be able to compare the star ratings for nearly 700 health insurance plans that are part of the Medicare Part D Prescription Drug program at this site. But the files linked here are darn near impossible to use, even if you know Excel. Best bet is to review the overall summary file at the bottom of the zipped file download. Other files show performance scores including member ratings. But you will have to phone a friend with a PhD to help. From CMS, updated spring 2019