| Provider | Group Practice/Location | Office Phone |
| Maagard, Dixon OD | Yellowstone Eye Care - Red Lodge | (406) 656-7605 |
| Mabey, Erin PA | ||
| Mabey, Erin PA | Broadwater Clinic - Walk-in | (406) 237-8550 |
| Mabey, Erin PA | Heights Clinic - Walk-in | (406) 237-8400 |
| Mabey, Erin PA | N. 27th Walk-in Clinic | (406) 237-5110 |
| Mabey, Erin PA | West End Clinic - Walk-In | (406) 901-2580 |
| MacAdam, Brett MD | Eastern Radiological Associates | (406) 237-5490 |
| Macdonald, Andrea APRN | Integrative Mental Health Services PLLC | (406) 702-1466 |
| Maher, Monica FNP | St. Vincent Regional Hospital - Emergency & Trauma Center | (406) 237-4116 |
| Mahoney, Chloe DPT | West Billings Physical Therapy | (406) 655-9060 |
| Maier, Dennis MD | Downtown Clinic - Wound Healing Center | (406) 237-8270 |
| Maier, Dennis MD | St. Vincent Wound Care & Infectioud Disease PB | (406) 237-8270 |
| Maier, Stacy LCSW | Yellowstone Boys & Girls Ranch | (406) 656-3112 |
| Maisch, Allison LCSW | RiverStone Health | (406) 247-3350 |
| Maisch, Allison LCSW | RiverStone Health - Medicine Crow School | (406) 247-3210 |
| Maisch, Allison LCSW | RiverStone Health - Orchard School | (406) 247-3210 |
| Maisch, Allison LCSW | RiverStone Health - Senior High School | (406) 247-3350 |
| Malik, Noman MD | Eastern Radiological Associates | (406) 237-5490 |
| Malli, Sarah APRN | Roundup Memorial Healthcare | (406) 323-2301 |
| Malli, Sarah APRN | Roundup Memorial Healthcare Clinic | (406) 323-3337 |
| Malody, Lisa MD | Downtown Clinic - Internal Medicine | (406) 238-6900 |
| Malters, Edward MD | Downtown Clinic - Internal Medicine | (406) 238-6900 |
| Malters, Edward MD | Intermountain Health West End Clinic - Internal Medicine | (406) 238-6900 |
| Malters, Deborah MD | Turnwell Mental Health of Montana - 24th Street | (406) 839-2985 |
| Malters, Deborah MD | Turnwell Mental Health of Montana - Bozeman | (406) 839-2985 |