Derek Cheung, MD
NPI 1336671981ActiveIndividual· Internal Medicine· San Marino, CA
Internal Medicine (MD) in San Marino, California, licensed in CA, with an NPI issued in April 2017. Part D covered 728 prescriptions written in 2024, 77% of them generic. Glaxosmithkline, LLC. was the largest of 2 companies reporting payments in 2024, $48.29 in all, mostly food and beverage.
Overview
| NPI | 1336671981 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 3, 2017 |
| Last updated in NPPES | Jan 22, 2022 |
| Certified by provider | Jan 22, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A158438 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 728 · 1,475 30-day fills |
|---|---|
| Patients | 111 |
| Total drug cost | $103,935 |
| Generic share | 77% of claims |
Industry payments (Open Payments)
- 2024$48.29 · 2 payments from 2 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $27.37 | 1 |
| Mallinckrodt Hospital Products Inc. | $20.92 | 1 |
What the 2024 payments were for
- Food and Beverage$48.29 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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