| Amerigroup MD | Kaiser – Kaiser Medicare |
| AmeriHealth Caritas DC | Kaiser – Medicare Advantage |
| AmeriHealth Caritas NC | Kaiser – Virginia Premier |
| Anthem HealthKeepers | Maryland Physician Care |
| Anthem of Virginia | MedCost |
| Blue Cross Blue Shield MA | Medicaid – DC, MD, MA (MassHealth), ME, NC, SC, TX, & WV |
| Blue Cross Blue Shield NC | Medicare |
| Blue Cross Blue Shield SC | Medstar Family Choice DC |
| CareFirst Community Plan DC | Medstar Family Choice MD |
| CareFirst Community Plan MD | Neighborhood Health |
| CareFirst DMV | Northwoods |
| Cigna | Optum Health Community |
| Dept of Labor | Prime Health |
| Harvard Pilgrim | Riverside Health of MD |
| Harvard Pilgrim Stride | Senior Whole Health |
| Healthy Blue | Tufts |
| HSCSN | Tufts HP Senior Care |
| Humana | Tufts Together |
| Humana Military – Tricare | UMR |
| John Hopkins EHP | United Healthcare VA |
| John Hopkins Priority Partners | VA Contracting |
| John Hopkins US FHP | Virginia Premier |
| Kaiser |