The MHA recently updated its analysis of Medicaid and Medicare enrollment based on September 2025 data. The analysis includes program enrollment as a percentage of each county’s total population and the split between fee-for-service and managed care organizations. Just over 26% of Michigan’s total population is enrolled in Medicaid and 23% is enrolled in Medicare.
Roughly two-thirds of Michigan’s 2.6 million Medicaid beneficiaries are enrolled in one of nine managed care plans.
Total Medicare enrollment is 2.28 million with 63% of beneficiaries enrolled in a Medicaid Advantage (MA) plan with only two counties having less than 50% of total Medicare enrollment in MA plans. MA enrollment by county ranges from 46% to 79%, with 73 counties having 55% or more of their Medicare population enrolled in an MA plan as highlighted below.
September enrollment is spread across 45 MA plans with up to 29 plans covering beneficiaries in several Michigan counties, with a minimum of five plans available in each county.
Members with enrollment questions should contact the health finance team at the MHA.