| Medical Group | Region | State |
| Advanced Healthcare | Wisconsin | WI |
| Affinity Health System | Wisconsin | WI |
| All Saints Healthcare | Wisconsin | WI |
| Avera McKennan | Midwest | SD |
| CORE Physicians Group | Northern | NH |
| Carilion | Southern | VA |
| Caritas Health Services | Southern | KY |
| Carle Clinic | Midwest | IL |
| Colorado Springs Health Partners | Midwest | CO |
| Columbia Medical Associates | Pacific NW | WA |
| Community Physicians of IN | Midwest | IN |
| Cornerstone Health Care | Southern | NC |
| Covenant Iowa | Midwest | IA |
| Covenant Medical Group | Wisconsin | WI |
| Creighton Medical Associates | Midwest | NE |
| Dean Medical Center | Wisconsin | WI |
| Dreyer Medical Clinic | Midwest | IL |
| East Tennessee Medical Group | Southern | TN |
| Everett Clinic | Pacific NW | WA |
| Fletcher Allen Healthcare | Northern | VT |
| Florida Medical Clinic | Southern | FL |
| Foundation Medical Partners | Northern | NH |
| Genesis Physicians Group | Southwest | TX |
| Greater Lafayette Health Services - Sigma | Midwest | IN |
| Greater Lafayette Health Services - Womens Clinic | Midwest | IN |
| Group Health Cooperative | Wisconsin | WI |
| Guthrie Clinic | Northern | PA |
| Health First | Ohio | OH |
| Holzer Clinic | Ohio | OH |
| IHA | Northern | MI |
| InterMountain Medical Group | Northern | PA |
| Iowa Clinic | Midwest | IA |
| Jackson Clinic | Southern | TN |
| Joslin Diabetes Center | Northern | MA |
| Kelsey-Seybold | Southwest | TX |
| Lahey Clinic | Northern | MA |
| Lakeshore Clinic | Pacific NW | WA |
| Lexington Clinic | Southern | KY |
| Loma Linda University Health Care | California | CA |
| Madrona Medical | Pacific NW | WA |
| Marianjoy Medical Group | Midwest | IL |
| McFarland Clinic | Midwest | IA |
| Medical Associates Healthcare | Midwest | IA |
| Medical College of Wisconsin | Wisconsin | WI |
| Mercy Health System | Wisconsin | WI |
| Methodist Physicians Clinic | Northern | NE |
| Midwest Community Health Associates | Ohio | OH |
| Ministry Medical Group | Wisconsin | WI |
| Minor and James | Pacific NW | WA |
| Mt. Kisco Medical Group | Northern | NY |
| North Shore Physicians Group | Northern | MA |
| North Texas SpineCare | Southwest | TX |
| Novant Health | Southern | NC |
| Oncology Alliance | Wisconsin | WI |
| PacMed Clinics | Pacific NW | WA |
| Pacific Medical Group | Pacific NW | OR |
| Physicians Clinic of Iowa | Midwest | IA |
| Poly Clinic | Pacific NW | WA |
| PriMed | Ohio | OH |
| Puget Sound Family Physicians | Pacific NW | WA |
| Red Cedar Medical Center | Wisconsin | WI |
| RiverBend Medical Group | Northern | MA |
| Riverside Medical Clinic | California | CA |
| Rockwood Clinic | Pacific NW | WA |
| Seattle Primary Physicians - Poly Clinic | Pacific NW | WA |
| Skagit Valley Medical Center | Pacific NW | WA |
| Springfield Clinic | Midwest | IL |
| St Marys Dean Venture | Wisconsin | WI |
| St. John's Mercy Medical Group | Midwest | MO |
| Summit Medical Group | Northern | NJ |
| Swedish Medical Center | Pacific NW | WA |
| Swedish Physician Division | Pacific NW | WA |
| Thedacare | Wisconsin | WI |
| UW Health | Wisconsin | WI |
| United Medical Associates | Northern | NY |
| United Medical Associates - Chenango Memorial Hospital | Northern | NY |
| United Medical Associates - United Health Services | Northern | NY |
| United States Coast Aviation Training | Southern | AL |
| UnitedHEALTH NETWORK | Pacific NW | OR |
| University of North Texas | Southwest | TX |
| University of Utah | Midwest | UT |
| University of Utah Hospitals and Clinics | Midwest | UT |
| University of Wisconsin Family Practice | Wisconsin | WI |
| Vancouver Clinic | Pacific NW | WA |
| Walla Walla Clinic | Pacific NW | WA |
| Wenatchee Valley | Pacific NW | WA |
| Westchester Medical Group | Northern | NY |
| Western Washington Medical Group | Pacific NW | WA |
| White-Wilson Medical Center | Southern | FL |
| Wichita Clinic | Midwest | KS |