| Department | Phone | Fax |
| Administration | 406-488-2364 | 488-2115 |
| Assisted Living | 406-488-4682 | 488-8069 |
| Audiology | 406-488-2510 | 488-2125 |
| Audiology & Hearing Aid Services | 406-488-2184 | 488-2568 |
| Cardiac Rehabilitation | 406-488-2124 | 488-2125 |
| Caregiver Support Group | 406-488-2327 | |
| Chaplain Services | 406-488-2596 | 488-2125 |
| Diabetes Education | 406-488-2305 | 488-2125 |
| Emergency Department | 406-488-2100 | 488-2125 |
| Emergency Medical Services | 406-488-2180 | 488-2125 |
| Extended Care | 406-488-2300 | 488-2260 |
| Fitness Center | 406-488-4631 | 488-2125 |
| G.E.T. Fit! | 406-488-4631 | 488-2125 |
| Home & Community Based Services | 406-488-2193 | 433-7866 |
| Home Health | 406-488-2138 | 488-2246 |
| Home Oxygen & Medical Supplies | 406-488-2566 | 488-2565 |
| Hospice | 406-488-2226 | 488-2246 |
| Laboratory | 406-488-2156 | 488-2155 |
| Laboratory Services | 406-488-2156 | 488-2155 |
| MedSpa Services | 406-488-2932 | 488-2580 |
| Metabolism Measurements | 406-488-2305 | |
| MonDak Family Clinic | 406-742-5261 | 742-5260 |
| Nutrition Services | 406-488-2178 | 488-2125 |
| Obstetrics | 406-488-2146 | 488-3902 |
| Outpatient Oncology | 406-488-2154 | 488-2125 |
| Pharmacy Services | 406-488-6563 | 488-2238 |
| Radiology Services | 406-488-2168 | 488-2172 |
| Rehabilitation Services | 406-488-2166 | 488-2220 |
| Respiratory Services | 406-488-2171 | 488-2125 |
| Sleep Lab | 406-488-2385 | 488-2125 |
| Smoking Cessation | 406-488-2195 | 488-2125 |
| Surgery | 406-488-2174 | 488-2125 |