Carolyn Sierra Rust, M.D.
NPI 1992097695ActiveIndividual· Emergency Medicine· Great Falls, MT
Emergency Medicine (M.D.) in Great Falls, Montana, trained at Albany Medical College of Union University (class of 2011). 312 Medicare patients in 2024, $41,038 paid; nearly all of their 62 Part D prescriptions were generic (98%).
Overview
| NPI | 1992097695 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 12, 2011 |
| Last updated in NPPES | Oct 6, 2025 |
| Certified by provider | Oct 6, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 55916 | MT |
| Emergency Medicine | 207P00000X | DR.0053676 | CO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Emergency Medicine (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 312 |
|---|---|
| Services billed | 544 across 16 procedure codes |
| Paid by Medicare | $41,038 |
Part D prescriptions in 2024
| Prescriptions (claims) | 62 · 64 30-day fills |
|---|---|
| Patients | 37 |
| Total drug cost | $444.00 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | Albany Medical College of Union University |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Emergency Medicine |
Medical group
- Benefis Hospitals IncGreat Falls, MT · 384 clinicians
Hospital affiliation
- Benefis Hospitals IncGreat Falls, MT
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 33 emergency medicine physicians in Great Falls · All emergency medicine physicians in Montana