Aaron Robert Steimel, DO
NPI 1659067874ActiveIndividual· Internal Medicine· O Fallon, MO
Internal Medicine (DO) in O Fallon, Missouri, trained at At Still University of Health Sciences, College of Osteo Med, Kirksville (class of 2023). Part D covered 430 prescriptions written in 2024, 82% of them generic. Lilly USA, LLC was the largest of 2 companies reporting payments in 2025, $81.67 in all, mostly food and beverage.
Overview
| NPI | 1659067874 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | Apr 12, 2023 |
| Last updated in NPPES | Jun 4, 2026 |
| Certified by provider | Jun 4, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 2024049983 | MO |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
| General Practice | 208D00000X | 2024049983 | MO |
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 - General Practice (MO) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 430 · 572 30-day fills |
|---|---|
| Patients | 67 |
| Total drug cost | $40,719 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | At Still University of Health Sciences, College of Osteo Med, Kirksville |
|---|---|
| Graduation year | 2023 |
| Medicare specialty | General Practice |
Hospital affiliation
- Mercy Hospital St LouisSaint Louis, MO
Industry payments (Open Payments)
- 2025$81.67 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $56.85 | 2 |
| Radius Health, Inc. | $24.82 | 1 |
What the 2025 payments were for
- Food and Beverage$81.67 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 internal medicine physicians in O Fallon · All internal medicine physicians in Missouri