Carl J. Chang, M.D.
NPI 1891983078ActiveIndividual· Dermatology· Arcadia, CA
Dermatology (M.D.) in Arcadia, California, trained at University of Southern California Keck School of Medicine (class of 2003). 608 Medicare patients in 2024, $217,928 paid; nearly all of their 811 Part D prescriptions were generic (94%). Genzyme Corporation was the largest of 14 companies reporting payments in 2025, $1,242 in all, mostly food and beverage.
Overview
| NPI | 1891983078 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 12, 2007 |
| Last updated in NPPES | Jul 13, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | A91493 | 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 | 608 |
|---|---|
| Services billed | 3,746 across 73 procedure codes |
| Paid by Medicare | $217,928 |
Part D prescriptions in 2024
| Prescriptions (claims) | 811 · 935 30-day fills |
|---|---|
| Patients | 282 |
| Total drug cost | $263,291 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Dermatology |
Industry payments (Open Payments)
- 2025$1,242 · 46 payments from 14 companies
- 2024$410.41 · 13 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $280.35 | 7 |
| Abbvie Inc. | $157.00 | 10 |
| Janssen Biotech, Inc. | $138.83 | 3 |
| Incyte Corporation | $137.52 | 8 |
| Galderma Laboratories, L.P. | $128.28 | 5 |
What the 2025 payments were for
- Food and Beverage$1,143 · 45 payments
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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