| Provider | Group Practice/Location | Office Phone |
| Nguyen, Trinh DO | Pioneer Medical Center | (406) 932-4603 |
| Nguyen, Trinh DO | Roundup Memorial Healthcare | (406) 323-2301 |
| Nguyen, Trinh DO | Roundup Memorial Healthcare Clinic | (406) 323-3337 |
| Nguyen, Trinh DO | South Big Horn County Hospital District DBA Three Rivers Health | (307) 568-3311 |
| Nguyen, Marie MD | Diversified Radiology | (303) 914-8800 |
| Nguyen, James OD | Bauer & Clausen PC | (406) 656-8886 |
| Nichols, Patricia LCPC | Positive Solutions | (406) 670-3956 |
| Nicola, Marcus FNP | Intermountain Health Heart & Vascular - Cody Clinic | (406) 237-5001 |
| Nicola, Marcus FNP | Intermountain Health Heart & Vascular - Downtown Cardiothoracic & Vascular Surgery | (406) 237-5001 |
| Nicola, Marcus FNP | Cody Clinic - Cardiology Outreach | (406) 237-5001 |
| Nicola, Marcus FNP | Cody Clinic - Vascular Outreach | (406) 238-6820 |
| Niles, DeAnna PA-C | Riverstone Health Clinic | (406) 697-0976 |
| Niles, DeAnna PA-C | RiverStone Health Clinic - Bridger | (406) 662-3740 |
| Niles, DeAnna PA-C | RiverStone Health Clinic - Joliet | (406) 962-9062 |
| Niles, DeAnna PA-C | RiverStone Health Clinic - Worden | (406) 967-2255 |
| Niles, DeAnna PA-C | Riverstone Health Lil Anderson Center | (406) 247-3350 |
| Noel, Michelle OTD | Hearing and Speech Connection- Billings | (406) 969-2770 |
| Noel, Michelle OTD | Montana Independent OT Advantage LLC | (406) 325-7037 |
| Norman, Eric MD | Intermountain Health - Billings Pediatric Specialty Clinic | (406) 237-5300 |
| Novakovich, Ashley LCSW | Moxy Counseling LLC | (406) 272-7098 |
| Oakes, Michael MD | Diversified Radiology | (303) 914-8800 |
| Oakes, Michael MD | SJMG Radiology | (406) 723-2500 |
| Oberg, Karen OTR/L | Aspen Grove Therapy and Wellness Center, LLC | (406) 541-2776 |
| Offerdahl, Daniel CRNA | Butte Clinic - Anesthesia | (406) 723-2472 |
| Ogger, Kelly LCSW | Big Sky Behavioral Health PLLC | (406) 672-8411 |