Thomas H. Oh, M.D.
NPI 1033275276ActiveIndividual· Emergency Medicine· Naperville, IL
Emergency Medicine (M.D.) in Naperville, Illinois, trained at Loma Linda University School of Medicine (class of 1999). 423 Medicare patients in 2024, $31,419 paid; nearly all of their 618 Part D prescriptions were generic (93%).
Overview
| NPI | 1033275276 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 30, 2006 |
| Last updated in NPPES | Dec 1, 2025 |
| Certified by provider | Dec 1, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 036-106421 | IL |
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 (CA); Practitioner - Emergency Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 423 |
|---|---|
| Services billed | 500 across 24 procedure codes |
| Paid by Medicare | $31,419 |
Part D prescriptions in 2024
| Prescriptions (claims) | 618 · 618 30-day fills |
|---|---|
| Patients | 453 |
| Total drug cost | $5,024 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Edward HospitalBolingbrook, IL · 96 clinicians
- Pacific Redwood Medical Group IncUkiah, CA · 58 clinicians
- Midwest Medical CenterGalena, IL · 36 clinicians
- Napa Valley Emergency Medical GroupSonoma, CA · 19 clinicians
Hospital affiliations
- Adventist Health St HelenaSaint Helena, CA
- Edward HospitalNaperville, IL
- Midwest Medical CenterGalena, IL
- Sonoma Valley HospitalSonoma, CA
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 60 emergency medicine physicians in Naperville · All emergency medicine physicians in Illinois