John Kwanghyuk Lee, MD
NPI 1598721284ActiveIndividual· Internal Medicine· Fullerton, CA
Internal Medicine (MD) in Fullerton, California, licensed in CA, with an NPI issued in April 2006. Their prescriptions cost Medicare Part D more than their services did: $2,261,201 for 21,350 claims, against $186,350 paid for services in 2024. Amgen Inc. reported $27.06 in payments in 2025, mostly food and beverage. Lists Providence St. Jude Medical Center as a hospital affiliation.
Overview
| NPI | 1598721284 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 22, 2006 |
| Last updated in NPPES | Oct 29, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A66137 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 338 |
|---|---|
| Services billed | 2,901 across 28 procedure codes |
| Paid by Medicare | $186,350 |
Part D prescriptions in 2024
| Prescriptions (claims) | 21,350 · 44,225 30-day fills |
|---|---|
| Patients | 1,274 |
| Total drug cost | $2,261,201 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Geriatric Medicine |
| Telehealth | Offers telehealth |
Hospital affiliation
- Providence St. Jude Medical CenterFullerton, CA
Other facilities
- Ace Home Health, Inc.Home health agency · Los Angeles, CA
- Western Home Care, IncHome health agency · Buena Park, CA
Industry payments (Open Payments)
- 2025$27.06 · 1 payment from 1 company
- 2024$156.27 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $27.06 | 1 |
What the 2025 payments were for
- Food and Beverage$27.06 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 56 internal medicine physicians in Fullerton · All internal medicine physicians in California