- 6 Degrees
- Align Networks
- Allegiance Provider Direct
- America’s Choice Provider Network
- BCBS – Federal
- BCBS – Healthy Montana Kids
- BCBS – Manage Care
- BCBS – Medicare
- BCBS – Traditional
- Community Health Network
- EBMS – City of Billings
- FedMed
- First Choice Health, Big Sky Region
- First Choice of the MidWest
- First Health/Coventry
- Fortified Provider Network
- Healthnet Federal Services
- Humana Commercial Choicecare – Alpine Air
- Humana Medicare Advantage
- InterWest EPO
- InterWest Health
- InterWest Work Comp
- Majoris – Montana Health Systems
- Montana Health Cooperative
- Moore Amish Church Group
- NaphCare
- Pacific Source
- Pacific Source Medicare
- Pacific Steel and Recycling
- PreferredOne
- Sibanye-Stillwater
- Three Rivers Provider Network
- TriWest VA
- United Healthcare
- United Healthcare – Medicare
