| Allen, Matthew MD | Eastern Radiological Associates | (406) 237-5490 |
| Alswang, Martin MD | Intermountain Health - Billings Pediatric Specialty Clinic | (406) 237-5300 |
| Alvord-Brown, Aimee PA-C | Billings OB/GYN Associates PC | (406) 248-3607 |
| Amato, Erin MD | Yellowstone Boys & Girls Ranch - Inpatient | (406) 655-2100 |
| Amato, Erin MD | Turnwell Mental Health of Montana - 24th Street | (406) 839-2985 |
| Amato, Erin MD | Turnwell Mental Health of Montana - Grand | (406) 839-2985 |
| Amato, Erin MD | Yellowstone Boys & Girls Ranch | (406) 655-2100 |
| Amato, Erin MD | Yellowstone Boys & Girls Ranch - Clinic | (406) 655-2100 |
| Amato, Erin MD | Turnwell Mental Health of Montana - Bozeman | (406) 839-2985 |
| Amen, Lynelle LCPC | Lynelle Amen MS, LCPC, PC | (406) 696-5134 |
| Ament, Joel MD | SVHC Pediatric Critical Care | (406) 237-7451 |
| Anderson, Carole NP | SVHC Neonatal Intensive Care | (406) 237-7076 |
| Anderson, Jason MD | Eastern Radiological Associates | (406) 237-5490 |
| Anderson, Ty MD | St. Vincent Regional Hospital - Emergency & Trauma Center | (406) 237-4116 |
| Anderson, John DO | Eastern Radiological Associates | (406) 237-5490 |
| Anderson, Jill LAC, LCPC | Healing Space | (406) 393-0097 |
| Anderson, Christina PHARM D | Planned Parenthood of Montana - Missoula | (406) 728-5490 |
| Anzalone, Nicholas MD | Cogent Healthcare of MT dba Sound Physicians | (406) 657-7000 |
| Anzalone, Christopher DO | Intermountain Health Heart & Vascular - Gallatin Cardiology & Electrophysiology Outreach | (406) 237-5001 |
| Anzalone, Nicholas MD | SVH Hospitalists | (406) 237-3850 |
| Anzalone, Christopher DO | Intermountain Health Heart & Vascular - Downtown Cardiac & Vascular Surgery | (406) 238-6820 |
| Apostol, Joseph MD | | |
| Apostol, Joseph MD | Intermountain Health Heart & Vascular - Downtown Cardiac & Vascular Surgery | (406) 238-6820 |
| Archer, Jeremy MD, MS | Wheatland Memorial Healthcare Clinic | (406) 632-4343 |
| Archer, Jeremy MD, MS | Wheatland Memorial Hospital | (406) 632-4351 |
