The MHA recently updated its analysis of Medicaid and Medicare enrollment based on December 2025 data. The analysis includes program enrollment as a percentage of each county’s total population and the split between fee-for-service (FFS) and managed care organization (MCO). Just over 25% of Michigan’s total population is enrolled in Medicaid and 23% is enrolled in Medicare.
Roughly two-thirds of Michigan’s 2.5 million Medicaid beneficiaries are enrolled in one of nine managed care plans.
Total Medicare enrollment is 2.3 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 47% to 79%, with 71 counties having 55% or more of their Medicare population enrolled in an MA plan, as highlighted below.
December enrollment is spread across 45 MA plans, with up to 29 covering beneficiaries in several Michigan counties and a minimum of five plans available in each county.
Members with enrollment questions should contact the MHA health finance team.