Eugene Byun, MD
NPI 1104812643ActiveIndividual· Internal Medicine, Interventional Cardiology· Fullerton, CA
Internal Medicine, Interventional Cardiology (MD) in Fullerton, California, trained at Indiana University School of Medicine (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $1,158,811 for 7,496 claims, against $184,612 paid for services in 2024. Pfizer Inc. was the largest of 11 companies reporting payments in 2025, $982.35 in all, mostly food and beverage.
Overview
| NPI | 1104812643 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 20, 2005 |
| Last updated in NPPES | Mar 6, 2026 |
| Certified by provider | Mar 6, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Interventional Cardiology Primary | 207RI0011X | G82180 | CA |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | G82180 | CA |
| Internal Medicine | 207R00000X | G82180 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,303 |
|---|---|
| Services billed | 3,370 across 64 procedure codes |
| Paid by Medicare | $184,612 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,496 · 20,296 30-day fills |
|---|---|
| Patients | 904 |
| Total drug cost | $1,158,811 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Interventional Cardiology |
| Telehealth | Offers telehealth |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Providence St. Jude Medical CenterFullerton, CA
Industry payments (Open Payments)
- 2025$982.35 · 31 payments from 11 companies
- 2024$1,139 · 58 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $227.98 | 9 |
| Abiomed | $173.71 | 2 |
| Boston Scientific Corporation | $101.27 | 3 |
| Novartis Pharmaceuticals Corporation | $97.60 | 5 |
| Kestra Medical Technology Services, Inc. | $93.34 | 1 |
What the 2025 payments were for
- Food and Beverage$982.35 · 31 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Interventional Cardiology providers in Fullerton
- 1407679970
- 1205396496
- 1669976585
- 1194711184
- 1033370358
All Internal Medicine, Interventional Cardiology providers in California →