- Aetna
- Allegiance
- Amerigroup
- APWU
- Blue Cross Blue Shield
- Bravo Health
- Cigna
- Cigna HealthSpring
- CoreSource
- Evercare
- GEHA
- Humana
- Johns Hopkins EHP
- Maryland Physicians Care
- Medical Assistance
- Medicare
- Medicare Advantage
- MedStar
- MHBP
- Multiplan PHCS
- Mutual of Omaha
- Priority Partners
- Riverside
- UHC Community Plan
- UMR
- United Health Care
