| Provider | Group Practice/Location | Office Phone |
| Sironi, Rindo MD | Billings OB/GYN Associates PC | (406) 248-3607 |
| Sise, Robert MD | Rimrock Foundation | (406) 248-3175 |
| Sizemore, Dorothy DO | Riverstone Health Clinic | (406) 697-0976 |
| Skarda, David MD | SVHC Fortin Pediatric Specialty Clinic | (406) 237-5300 |
| Slagsvold, Leigh FNP | RiverStone Health | (406) 247-3350 |
| Slone, Richard MD | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| Slone, Richard MD | NEMHS - Trinity Hospital | (406) 653-6500 |
| Slyngstad, Tyler MD | Intermountain Health Heart & Vascular - Cody Clinic | (406) 237-5001 |
| Slyngstad, Tyler MD | Intermountain Health Heart & Vascular - Downtown Cardiothoracic & Vascular Surgery | (406) 237-5001 |
| Slyngstad, Tyler MD | SJMG Heart Center | (406) 723-2420 |
| Slyngstad, Tyler MD | Intermountain Health Heart & Vascular - Butte Clinic | (406) 723-2951 |
| Slyngstad, Tyler MD | Cody Clinic - Cardiology Outreach | (406) 237-5001 |
| Small, Terry LAC | New Day, Inc | (406) 545-0486 |
| Smith, Erica MD | ||
| Smith, Erica MD | Butte Clinic - Maternal Fetal Medicine | (406) 237-8480 |
| Smith, Nicholas PA-C | St. James Emergency Physicians | (406) 723-2585 |
| Smith, Lyndsay LCSW | Sentinel Mental Health Inc - Helena | (406) 272-2511 |
| Smith, Nicholas J DC | Vitality A Professional Corporation DBA Billings Chiropractic Injury Clinic | (406) 969-3805 |
| Smith, Emily PA | Intermountain Health Connect Care - Urgent Care & Physical Therapy MT | 801-442-5502 |
| Smith, Patricia NP | Intermountain Health Connect Care - Urgent Care & Physical Therapy MT | 801-442-5502 |
| Smith, Brian DO | Cogent Healthcare of MT, PC dba Sound Physicians of MT | (406) 657-7000 |
| Smith, Brian DO | St. Vincent Regional Hospital - Adult Critical Care | (406) 237-7200 |
| Smith, Brian DO | St. Vincent Hospitalists | (406) 237-3850 |
| Smith, Brian DO | Cogent Healthcare of MT PC dba Sound Physicians of MT II | (855) 768-6363 |
| Smith, William PA-C | Ortho Montana PSC - Red Lodge | 406-237-5050 |