| Provider | Group Practice/Location | Office Phone |
| Ibrahim, Jill APRN | NEMHS - Listerud Rural Health Clinic | (406) 653-2501 |
| Iglehart, Demarcus MS, LCPC | Deep Roots Counseling | (406) 299-3768 |
| Ingram-Hegenbart, Richard LCPC | Yellowstone Boys & Girls Ranch | (406) 656-3112 |
| Ingvalson, Abbey PA | Holy Rosary Hospital - Primary Care Clinic | (406) 233-2500 |
| Ingvalson, Abbey PA | Holy Rosary Hospital - General Surgery Clinic | (406) 233-2500 |
| Irene, Garrett DC | Heights Family Chiropractic PLLC | (406) 702-1041 |
| Itkin, Alan MD | Eastern Radiological Associates | (406) 237-5490 |
| Ituarte, Felipe MD | Ortho Montana PSC | (406) 237-5050 |
| Ivankovich, Susan PA-C | Broadwater Clinic - Walk-in | (406) 237-8550 |
| Ivankovich, Susan PA-C | Heights Clinic - Walk-in | (406) 237-8400 |
| Ivankovich, Susan PA-C | Laurel Clinic - Walk-in | (406) 237-3160 |
| Ivankovich, Susan PA-C | N. 27th Walk-in Clinic | (406) 237-5110 |
| Ivankovich, Susan PA-C | West End Clinic - Walk-In | (406) 901-2580 |
| Ivey, Lynn MD | NEMHS - Poplar Community Hospital | (406) 768-6100 |
| Ivey, Lynn MD | NEMHS - Trinity Hospital | (406) 653-6500 |
| Jack, Jeremy LCPC | CrossWay Incorporated | (406) 969-5183 |
| Jackson, Kristina DO | West End Clinic - Walk In | (406) 901-2580 |
| Jackson, Sandra LAC | Mental Health Center - Billings | (406) 252-5658 |
| Jackson, Sandra LAC | Rimrock Foundation | (406) 248-3175 |
| Jackson, Chad LCPC | Silver Spark PC | (406) 794-8951 |
| Jackson, Stacey FNP | Yellowstone Boys & Girls Ranch | (406) 656-3112 |
| Jackson, Stacey FNP | Yellowstone Boys & Girls Ranch - Clinic | (406) 655-2100 |
| Jagodzinski, Tanya MD | Children\'s Clinic of Billings - Outpatient | (406) 281-8700 |
| Jagodzinski, Tanya MD | Children\'s Clinic of Billings - Westend | (406) 281-8700 |
| James, Thomas MD | RiverStone Health | (406) 247-3350 |