Meridian | 17,530 followers on LinkedIn. Improving the quality of care in a low-resource environment. | Meridian in Michigan’s (Meridian) mission is to continuously improve the quality of care in a low-resource environment. Meridian is Michigan’s largest Medicaid HMO, providing health care to Medicaid beneficiaries through a contract with the Michigan Department of Health and Human Services. Meridian's affiliates include MeridianComplete a Medicare-Medicaid health plan, Ambetter from Meridian a commercial plan available through the Health Insurance Marketplace, and Wellcare a Medicare Advantage plan.