UnitedHealthcare to expand ACA exchange offerings to 7 new states September 3, 2021 Auto Bot ACA, Enrollment, Expansion, Health Plans, Marketplaces, News, Obamacare, Payers, UnitedHealthcare 0 UnitedHealthcare is planning to participate in the ACA insurance exchanges in Alabama, Florida, Georgia, Illinois, Louisiana, Michigan and Texas. This will bring its total ACA marketplace footprint to 18 states.