Maryland Gov. Larry Hogan (R) last week said...

...UnitedHealthcare will join Kaiser Permanente and CareFirst BlueCross BlueShield in the state's 2021 ACA exchange market. United's presence in the individual markets has dropped dramatically since its high of 34 states in 2016, with the insurer now enrolling about 153,000 exchange members in just three states. Gov. Hogan said about 29,000 people have newly enrolled in Maryland's exchange throughout the state's special coronavirus open enrollment period, which will run through June 15.

From AIS’s Directory of Health Plans