The Centers for Medicare & Medicaid Services (CMS) provides monthly data on Medicare Advantage (MA) enrollment in the United States, by County. This tip sheet from the Administration for Community Living (ACL) provides an overview on how to conduct a market analysis to determine the top Medicare Advantage plans, by enrollment in a specific county.
This enrollment data provides insight into which MA plan has the largest market share in a particular county. This data can help a community-based organization (CBO) develop a contracting strategy for their particular market.
View the resource: ACL Tip Sheet: Medicare Advantage Plan Market Share Analysis