| Carrington-Hellier, Crystal OD | Billings Family Optical | (406) 245-2299 |
| Carson, Craig MD | Montana Arthritis Center, LLC | (406) 702-1327 |
| Carson, Craig MD | PURE Infusion Suites of MT LLC - Billings | (406) 702-1327 |
| Carson, Craig MD | PURE Infusion Suites of MT LLC - Great Falls | (406) 384-7002 |
| Cassidy, Cassandra LCPC | Cassandra Cassidy LCPC LLC | (406) 272-5090 |
| Cates, Cassandra LAC | Rimrock Foundation | (406) 248-3175 |
| Causey , Marlin MD | SVHC Heart & Vascular Center | (406) 238-6820 |
| Certain, Courtney DO | SVH Hospitalists | (406) 237-3850 |
| Certain, Courtney DO | Sound Physicians | (406) 237-7000 |
| Chaloux, Tiffany MD | SVHC Bozeman Clinic | (406) 556-5888 |
| Chamberlain, David MD | SJMG Cardiac Interpretations | |
| Chambers, Tammy FNP-C | Beartooth Billings Clinic | (406) 446-2345 |
| Chambers, Tammy FNP-C | Roundup Memorial Healthcare Clinic | (406) 323-3337 |
| Chambers, Tammy FNP-C | Roundup Memorial Healthcare Hospital | (406) 323-2301 |
| Champer, Veronica FNP | St James Boulder Clinic | (406) 225-4201 |
| Chase, Cal DPT | West Billings Physical Therapy | (406) 655-9060 |
| Chase, Jr., Douglas PT | West Billings Physical Therapy | (406) 655-9060 |
| Cherni-Smith, Rita MD | SVHC Billings Transitional Care | (406) 237-8282 |
| Chiappetta, Carolyn LCPC | Yellowstone Boys & Girls Ranch | (406) 655-2100 |
| Chorney, Collette MD | SJMG Rocky Mountain Clinic | (406) 496-3633 |
| Chouinard-Braden, Jean NP | The Children's Clinic of Billings - Outpatient | (406) 281-8700 |
| Chouinard-Braden, Jean NP | The Children's Clinic of Billings, PC | (406) 281-8700 |
| Chouinard-Braden, Jean NP | Ohana Providers, PLLC | (406) 272-4631 |
| Christensen, Anthony DPT | Beartooth Billings Clinic | (406) 446-2345 |
| Christenson, Brian MD | Eastern Radiological Associates | (406) 237-5490 |
