| Provider | Group Practice/Location | Office Phone |
| 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 |
| Cox, Joeleen DC | Ottun Chiropractic PC | (406) 259-9383 |
| Craddock, Mike MS, LCPC | Highland Mountains Counseling | (406) 299-2812 |
| Crane, Alicia DNP, FNP | Holy Rosary Hospital - Primary Care Clinic | (406) 233-2500 |
| Crellin, Katie ACNP | Eastern Radiological Associates | (406) 237-5490 |
| Crnkovich, Francis MD | Diversified Radiology | (303) 914-8800 |
| Cross, Lynette FNP | Downtown Clinic - Internal Medicine | (406) 238-6900 |
| Cross, Gregory MD | Wheatland Memorial Healthcare Clinic | (406) 632-4343 |
| Cross, Gregory MD | Wheatland Memorial Hospital | (406) 632-4351 |
| Cross, Gregory MD | South Big Horn Hospital District dba Three Rivers Health | (307) 568-3311 |
| Cross, Gregory MD | Pioneer Medical Center | (406) 932-4603 |
| Cross, Gregory MD | Midway Clinic DBA Three Rivers Health | (307) 568-3311 |
| Cunningham, Kristopher MD | Cogent Healthcare of MT dba Sound Physicians | (406) 657-7000 |
| Cunningham, Kristopher MD | SVH Hospitalists | (406) 237-3850 |
| Cunningham, Kristopher MD | St. Vincent Regional Hospital - Adult Critical Care | (406) 237-7200 |
| Curry, Edward MD | SJMG Ortho Now | (406) 496-3400 |
| Dahl, Dona MD | Billings OB/GYN Associates PC | (406) 248-3607 |
| Daines, Turner DO | Eastern Radiological Associates | (406) 237-5490 |
| Daley, Douglas DC | W Bar Chiropractic, LLC Glendive | (406) 377-2543 |
| Dalton, Abigail PA-C | RiverStone Health | (406) 247-3350 |