To find a Provider, select your state and plan below. Beginning January 1, 2021, the Provider Search and any provider network updates for the following plans will be moved: MeridianComplete (Michigan), MeridianComplete (Illinois), and Ambetter from Meridian (formerly MeridianChoice).. If you are looking for MeridianComplete of Michigan providers in 2021, you can find an up-to-date provider ....