Diem Chieu Chang, D.D.S.
NPI 1730335951ActiveIndividual· Dentist, General Practice· Lake Forest, CA
Dentist, General Practice (D.D.S.) in Lake Forest, California, licensed in CA, with an NPI issued in August 2008. Part D covered 24 prescriptions written in 2024, 79% of them generic. Amgen Inc. was the largest of 5 companies reporting payments in 2025, $583.82 in all, mostly food and beverage.
Overview
| NPI | 1730335951 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.D.S. |
| Sole proprietor | Yes |
| NPI issued | Aug 8, 2008 |
| Last updated in NPPES | Aug 8, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dentist, General Practice Primary | 1223G0001X | 51323 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 24 · 34 30-day fills |
|---|---|
| Total drug cost | $88.13 |
| Generic share | 79% of claims |
Industry payments (Open Payments)
- 2025$583.82 · 10 payments from 5 companies
- 2024$891.35 · 19 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $337.54 | 4 |
| Kyowa Kirin, Inc. | $150.96 | 2 |
| Novo Nordisk Inc | $57.27 | 2 |
| Pfizer Inc. | $21.03 | 1 |
| Calliditas Therapeutics US Inc. | $17.02 | 1 |
What the 2025 payments were for
- Food and Beverage$583.82 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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