| Provider | Group Practice/Location | Office Phone |
| Walker, Madison OTD | Alpenglow Physical Therapy - West | 406-534-1026 |
| Wallace, John DNP | Beartooth Billings Clinic | (406) 446-2345 |
| Wallace, John DNP | Beartooth Billings Clinic - Clinic | (406) 446-2345 |
| Wallen, Kenny CRNA | Butte Clinic - Anesthesia | (406) 723-2472 |
| Wallis, Michael MD | Intermountain Health - Billings Pediatric Specialty Clinic | (406) 237-5300 |
| Walton, Sarah FNP-C | Pioneer Medical Center | (406) 932-4603 |
| Walton-Shirley, Melissa MD | Intermountain Health Heart & Vascular - Downtown Cardiothoracic & Vascular Surgery | (406) 237-5001 |
| Wang, Chia-Lien MD | Butte Clinic - OB-GYN | (406) 496-3627 |
| Wannebo, Elizabeth MD | St. Vincent Regional Hospital - Adult Critical Care | (406) 237-7200 |
| Wannebo, Elizabeth MD | Cogent Healthcare of MT, PC dba Sound Physicians of MT | (406) 657-7000 |
| Wannebo, Elizabeth MD | SVH Hospitalists | (406) 237-3850 |
| Ward, Arvin PA-C | McCone County Health Center | (406) 485-2063 |
| Ward, Samuel DO | Heights Clinic - Family Medicine | (406) 237-8300 |
| Ward, Catherine LCSW | Yellowstone Boys & Girls Ranch | (406) 656-3112 |
| Warner, Britt PA | Intermountain Health St. James Hospital | 406-723-2500 |
| Warner, Rachel OD | Bauer & Clausen PC | (406) 656-8886 |
| Warner, Christopher MD | Diversified Radiology | (303) 914-8800 |
| Waters, Maria DO | Yellowstone Pathologists PC - Billings | (406) 238-6360 |
| Waters, Maria DO | Yellowstone Pathology Institute Inc - Billings | (406) 238-6360 |
| Watson, Rishay LCPC | Rishay Watson LCPC PLLC | 406-672-3499 |
| Watson, Rishay LCPC | Yellowstone Boys & Girls Ranch | (406) 656-3112 |
| Waweru, Eric NP | Beartooth Billings Clinic | (406) 446-2345 |
| Waweru, Eric NP | Beartooth Billings Clinic - Clinic | (406) 446-2345 |
| Wear, Kyanne LCSW | Sentinel Mental Health Inc | (406) 272-2511 |
| Wear, Kyanne LCSW | Sentinel Mental Health Inc - Helena | (406) 272-2511 |