Marvin L. Warren, M.D.
NPI 1386733327ActiveIndividual· Anesthesiology· Billings, MT
Anesthesiology (M.D.) in Billings, Montana, trained at University of Kansas School of Med (Kc/Wich/Sal) (class of 1980). Medicare paid $28,297 for services to 214 patients in 2024.
Overview
| NPI | 1386733327 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 11, 2006 |
| Last updated in NPPES | Jan 29, 2020 |
| Certified by provider | Jan 29, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Anesthesiology Primary | 207L00000X | 5217 | MT |
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 - Anesthesiology (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 214 |
|---|---|
| Services billed | 246 across 21 procedure codes |
| Paid by Medicare | $28,297 |
Education and affiliations
| Medical school | University of Kansas School of Med (Kc/Wich/Sal) |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Anesthesiology |
Medical group
- Billings Clinic Specialty Supplies and Services, LLCBillings, MT · 824 clinicians
Hospital affiliation
- Billings Clinic HospitalBillings, 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 76 anesthesiologists in Billings · All anesthesiologists in Montana