Charles Chiang, M.D
NPI 1780889519ActiveIndividual· Dermatology· Fremont, CA
Dermatology (M.D) in Fremont, California, trained at University of California, San Diego School of Medicine (class of 2007). In 2024 Medicare paid $116,269 for 200 patients, and Part D covered 503 of their prescriptions, 89% of them generic. Leo Pharma Inc. was the largest of 19 companies reporting payments in 2025, $3,389 in all, mostly food and beverage.
Overview
| NPI | 1780889519 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Jun 20, 2007 |
| Last updated in NPPES | Nov 26, 2024 |
| Certified by provider | Nov 26, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | A104751 | 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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 200 |
|---|---|
| Services billed | 1,843 across 32 procedure codes |
| Paid by Medicare | $116,269 |
Part D prescriptions in 2024
| Prescriptions (claims) | 503 · 552 30-day fills |
|---|---|
| Patients | 157 |
| Total drug cost | $171,661 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Dermatology |
Medical group
- Berman Skin Institute Medical Group IncWalnut Creek, CA · 22 clinicians
Industry payments (Open Payments)
- 2025$3,389 · 183 payments from 19 companies
- 2024$2,395 · 131 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Leo Pharma Inc. | $503.46 | 37 |
| Abbvie Inc. | $400.08 | 20 |
| Lilly USA, LLC | $357.14 | 18 |
| Ucb, Inc. | $344.55 | 19 |
| Incyte Corporation | $325.43 | 18 |
What the 2025 payments were for
- Food and Beverage$3,309 · 182 payments
- Education$79.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 16 dermatologists in Fremont · All dermatologists in California