| Provider | Group Practice/Location | Office Phone |
| Tomlinson, Daniel MD | Holy Rosary Healthcare Clinic | (406) 233-2500 |
| Toqeer, Qaiser MD | St. Vincent Neurosurgery | (406) 237-5577 |
| Toqeer, Qaiser MD | St. Vincent Regional Hospital Neurology Service | (406) 237-3850 |
| Toth, Dustan LCPC | Discovery Therapy LLC | (406) 839-5815 |
| Toyne Jr, George DC | Northern Chiropractic PC - Colstrip | (406) 748-4004 |
| Toyne Jr, George DC | Northern Chiropractic PC - Hardin | (406) 665-1555 |
| Treemarcki, Erin DO | SVHC Fortin Pediatric Specialty Clinic | (406) 237-5300 |
| Trickey, David MD | SVHC Emergency & Trauma Center | (406) 237-4116 |
| Troop, Thomas MD | Cogent Healthcare of MT dba Sound Physicians | (406) 657-7000 |
| Troop, Thomas MD | SVH Hospitalists | (406) 237-3850 |
| Trost, Gustav PT | Boulder Clinic - Physical Therapy | (406) 225-4201 |
| Trost, Gustav PT | SJMG Therapy - Whitehall | (406) 287-3717 |
| Trost, Michelle FNP | Broadwater Clinic - Family Medicine | (406) 237-5200 |
| Trost, Michelle FNP | Lockwood Clinic - Family Medicine | (406) 237-5444 |
| Trost, Michelle FNP | North Shiloh Clinic - Family Medicine | (406) 237-8989 |
| Trost, Michelle FNP | West Grand Clinic - Family Medicine | (406) 237-5353 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Ashland | (406) 784-2346 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Chinook | (406) 357-2294 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Dawson | 406-377-9410 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Glendive | (406) 815-5831 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Greybull | (307) 765-1450 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Hardin | (406) 665-4103 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Hardin Campus | (406) 665-4103 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Hardin School | 406-665-4103 |
| Tryder, Jennifer FNP | BVHC DBA One Health - Harlem Sweet | (406) 353-4861 |