| South Central Montana Regional Mental Health Center, Outpatient Mental Health Facility | South Central Montana Regional Mental Health Center | (406) 252-5658 |
| Spire, William MD | SVHC Neuroscience Center | (406) 237-5577 |
| Spire, William MD | SVHC Neurosurgery - Billings | (406) 237-5577 |
| Spoja, Christoffer DO | Sound Physicians | (406) 237-7000 |
| Spoja, Christoffer DO | SVH Hospitalists | (406) 237-3850 |
| Spoja, Christoffer DO | Holy Rosary Healthcare | (406) 233-2600 |
| Spooner , Christopher MD | Holy Rosary Healthcare | (406) 233-2600 |
| Spuhler, Sheri PA-C | SVP Downtown Walk In | (406) 237-4141 |
| Spuhler, Sheri PA-C | SVHC Broadwater Walk-In Clinic | (406) 237-4116 |
| Spuhler, Sheri PA-C | SVHC Absarokee Clinic | (406) 328-4497 |
| St James Summit Laboratory | St James Summit Laboratory | (406) 496-2610 |
| St Vincent Healthcare Medical Supply and Mobility | St Vincent Healthcare Medical Supply & Mobility | (406) 237-8900 |
| St. Vincent Healthcare, Hospital | St Vincent Healthcare | (406) 238-7800 |
| Staebler, Kaitlin PA-C | Montana Psychiatry, PLLC | (406) 839-2985 |
| Staebler, Kaitlin PA-C | Yellowstone Boys & Girls Ranch | (406) 655-2100 |
| Staebler, Kaitlin PA-C | Yellowstone Boys & Girls Ranch - Inpatient | (406) 655-2100 |
| Staebler, Kaitlin PA-C | Yellowstone Boys & Girls Ranch - Clinic | (406) 655-2100 |
| Stahley, Susan LCPC | Stahley Counseling and Consulting PLLC | (406) 850-8992 |
| Standish, David MD | The Children's Clinic of Billings - Outpatient | (406) 281-8700 |
| Standish, David MD | The Children's Clinic of Billings, PC | (406) 281-8700 |
| Stapler, Dale MD | SVH Hospitalists | (406) 237-3850 |
| Stapler, Dale MD | Sound Physicians | (406) 237-7000 |
| Stark, Tawny LCPC | Reflections Counseling LLC | (406) 855-7255 |
| Steffes, Malissa LCSW | Yellowstone Boys & Girls Ranch | (406) 655-2100 |
| Stein, Kenneth DC | Stein Chiropractic & Sports Clinic | (406) 234-2964 |
