
| Provider | Group Practice/Location | Office Phone |
| Cook, Frances ARNP | NEMHS - Faith Lutheran Home | (406) 653-6421 |
| Cook, Frances ARNP | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| Cook, Frances ARNP | NEMHS - Trinity Hospital | (406) 653-6500 |
| Cook, Frances ARNP | NEMHS - Riverside Family Clinic | (406) 768-5171 |
| Cooper, Benjamin MD | Diversified Radiology | (303) 914-8800 |
| Cooper, Benjamin MD | Butte Clinic- Radiology | (406) 723-2500 |
| Copps, Katie PA-C | Holy Rosary Healthcare | (406) 233-2600 |
| Copps, Katie PA-C | Holy Rosary Healthcare Clinic | (406) 233-2500 |
| Cordina, Steve MD | St. Vincent Neurosurgery | (406) 237-5577 |
| Corey, Shawn MD PHD | Diversified Radiology | (303) 914-8800 |
| Corey, Shawn MD PHD | SJMG Radiology | (406) 723-2500 |
| Corley, Teresa PA | Intermountain Montana Virtual Care Clinic | (406) 237-5110 |
| Cotnoir, Malary PA-C | ||
| Cotton, Casey DO | Eastern Radiological Associates | (406) 237-5490 |
| Cotton , Nichole LCPC | Something Beautiful Counseling | (406) 672-2056 |
| Couturier, Spencer MD | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| Couturier, Spencer MD | NEMHS - Trinity Hospital | (406) 653-6500 |
| Cox, Joeleen DC | Ottun Chiropractic PC | (406) 259-9383 |
| Cox, Andrew MD | Beartooth Billings Clinic | (406) 446-2345 |
| Cox, Andrew MD | Beartooth Billings Clinic - Clinic | (406) 446-2345 |
| Cox, Andrew MD | Big Horn Hospital | (406) 665-2310 |
| Cox, Andrew MD | Midway Clinic DBA Three Rivers Health | (307) 568-3311 |
| Cox, Andrew MD | Pioneer Medical Center | (406) 932-4603 |
| Cox, Andrew MD | South Big Horn County Hospital District DBA Three Rivers Health | (307) 568-3311 |
| Craddock, Mike MS, LCPC | Highland Mountains Counseling | (406) 299-2812 |