| Provider | Group Practice/Location | Office Phone |
| Overvold, Kimberly LCSW | Omni Counseling Service, LLC | (406) 855-3501 |
| Owen, Thomas MD | Ortho Montana PSC | (406) 237-5050 |
| Owen, Thomas MD | Ortho Montana PSC - Westend | (406) 237-5050 |
| Owen, Thomas MD | Ortho Montana PSC - Bozeman | 406-237-5050 |
| Oza, Palak MD | Butte Clinic - OB-GYN | (406) 496-3627 |
| Ozguler, Bora MD | Butte Clinic - OB-GYN | (406) 496-3627 |
| O\'Neil, Cheryl LAC | Yellowstone Boys & Girls Ranch | (406) 656-3112 |
| O\'neil, Julie CNM | NEMHS - Listerud Rural Health Clinic | (406) 653-2501 |
| O\'neil, Julie CNM | NEMHS - Faith Lutheran Home | (406) 653-6421 |
| O\'neil, Julie CNM | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| O\'neil, Julie CNM | NEMHS - Trinity Hospital | (406) 653-6500 |
| O\'neil, Julie CNM | NEMHS - Riverside Family Clinic | (406) 768-5171 |
| P, Craig Cook | ||
| Pace, William MD | Eastern Radiological Associates | (406) 237-5490 |
| Paczkowski, Samuel MD | Holy Rosary Healthcare | (406) 233-2600 |
| Paczkowski, Samuel MD | SVHC Emergency & Trauma Center | (406) 237-4116 |
| Palos, Miguel MD | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| Palos, Miguel MD | NEMHS - Trinity Hospital | (406) 653-6500 |
| Pan, Lawrence MD | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| Pan, Lawrence MD | NEMHS - Trinity Hospital | (406) 653-6500 |
| Papez, Julianna DO | Billings OB/GYN Associates PC | (406) 248-3607 |
| Parada, Andrea MD | Diversified Radiology | (303) 914-8800 |
| Parada, Andrea MD | SJMG Radiology | (406) 723-2500 |
| Parada, Andrea MD | Butte Clinic- Radiology | (406) 723-2500 |
| Paris, Riley PA-C | St. Vincent Neurosurgery | (406) 237-5577 |