Alex Leung, M.D
NPI 1669414512ActiveIndividual· Internal Medicine· Fullerton, CA
Internal Medicine (M.D) in Fullerton, California, trained at Medical College of Wisconsin (class of 2003). In 2024 Medicare paid $39,297 for 226 patients, and Part D covered 451 of their prescriptions, 83% of them generic. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 8 companies reporting payments in 2025, $1,146 in all, mostly food and beverage.
Overview
| NPI | 1669414512 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | Yes |
| NPI issued | Jun 12, 2006 |
| Last updated in NPPES | Nov 23, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A88871 | CA |
| Family Medicine | 207Q00000X | A88871 | 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 | 226 |
|---|---|
| Services billed | 498 across 10 procedure codes |
| Paid by Medicare | $39,297 |
Part D prescriptions in 2024
| Prescriptions (claims) | 451 · 513 30-day fills |
|---|---|
| Patients | 152 |
| Total drug cost | $38,185 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Internal Medicine |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Providence St. Jude Medical CenterFullerton, CA
Industry payments (Open Payments)
- 2025$1,146 · 20 payments from 8 companies
- 2024$352.44 · 11 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $366.26 | 3 |
| Lemaitre Vascular, Inc. | $348.81 | 8 |
| Globus Medical, Inc. | $164.47 | 1 |
| Abbott Laboratories | $107.27 | 2 |
| Pfizer Inc. | $61.07 | 3 |
What the 2025 payments were for
- Food and Beverage$1,146 · 20 payments
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