| Provider | Group Practice/Location | Office Phone |
| Mcclure, Jeffrey MD | NEMHS - Trinity Hospital | (406) 653-6500 |
| Mccord, Laura CNM | ||
| McCord, Mark MD | SJMG Radiation Oncology | (406) 723-2621 |
| McCormick, Mary PA-C | Broadwater Clinic - Walk-in | (406) 237-8550 |
| McCormick, Mary PA-C | Heights Clinic - Walk-in | (406) 237-8400 |
| McCormick, Mary PA-C | Intermountain Health West End Clinic - Walk In | (406) 901-2580 |
| McCormick, Mary PA-C | Laurel Clinic - Walk-in | (406) 237-3160 |
| McCormick, Mary PA-C | N. 27th Walk-in Clinic | (406) 237-5110 |
| Mccorvey, Barbara MD | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| Mccorvey, Barbara MD | NEMHS - Trinity Hospital | (406) 653-6500 |
| McCotter, Trevor MD | SVHC Emergency & Trauma Center | (406) 237-4116 |
| McCoy, Kendy LCPC, LAC | Rimrock Foundation | (406) 248-3175 |
| McCoy, Kendy LCPC, LAC | ||
| Mcculloch, Madison MD | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| Mcculloch, Madison MD | NEMHS - Trinity Hospital | (406) 653-6500 |
| McCullough, Shane PA-C | Riverstone Health Clinic | (406) 697-0976 |
| McDalasair, Andrew LCPC | Yellowstone Boys & Girls Ranch | (406) 656-3112 |
| McDalasair, Andrew LCPC | Handlebar Therapy Group PLLC | (406) 647-7530 |
| McDonagh, Caeley LCSW | BVHC DBA One Health - Greybull | (307) 765-1450 |
| McDonagh, Caeley LCSW | BVHC DBA One Health - Lovell | (307) 548-9123 |
| McDonagh, Caeley LCSW | BVHC DBA One Health - Powell | (307) 764-4107 |
| McDonagh, Caeley LCSW | BVHC DBA One Health - Sheridan | (307) 674-6995 |
| McDonagh, Caeley LCSW | BVHC DBA One Health - Whitney Building | (307) 674-6995 |
| McDonagh, Caeley LCSW | BVHC DBA One Health - Cody | 307-291-0447 |
| McDowell, Gregory MD | Ortho Montana PSC | (406) 237-5050 |