Derek E. Chen, DDS
NPI 1104248582ActiveIndividual· Dentist, General Practice· Walnut, CA
Dentist, General Practice (DDS) in Walnut, California, licensed in CA, with an NPI issued in January 2014. Part D covered 33 prescriptions written in 2024, 100% of them generic. Colgate Oral Pharmaceuticals, Inc. reported $30.59 in payments in 2025, mostly education.
Overview
| NPI | 1104248582 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DDS |
| Sole proprietor | Yes |
| NPI issued | Jan 20, 2014 |
| Last updated in NPPES | Sep 3, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dentist, General Practice Primary | 1223G0001X | 63076 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 33 · 33 30-day fills |
|---|---|
| Patients | 18 |
| Total drug cost | $153.14 |
| Generic share | 100% of claims |
Industry payments (Open Payments)
- 2025$30.59 · 1 payment from 1 company
- 2024$61.18 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Colgate Oral Pharmaceuticals, Inc. | $30.59 | 1 |
What the 2025 payments were for
- Education$30.59 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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