Anne Lynn Su Chang, MD
NPI 1013049188ActiveIndividual· Dermatology· Stanford, CA
Dermatology (MD) in Stanford, California, trained at Harvard Medical School (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $626,764 for 467 claims, against $86,418 paid for services in 2024. Regeneron Pharmaceuticals, Inc. was the largest of 4 companies reporting payments in 2025, $20,923 in all, mostly consulting fees.
Overview
| NPI | 1013049188 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 12, 2007 |
| Last updated in NPPES | Apr 16, 2024 |
| Certified by provider | Apr 16, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | A74696 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 224 |
|---|---|
| Services billed | 2,465 across 41 procedure codes |
| Paid by Medicare | $86,418 |
Part D prescriptions in 2024
| Prescriptions (claims) | 467 · 603 30-day fills |
|---|---|
| Patients | 136 |
| Total drug cost | $626,764 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Dermatology |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$20,923 · 23 payments from 4 companies
- 2024$10,538 · 13 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Pharmaceuticals, Inc. | $12,889 | 12 |
| Abbvie Inc. | $4,857 | 7 |
| Sun Pharmaceutical Industries Inc. | $3,026 | 3 |
| Galderma Laboratories, L.P. | $150.00 | 1 |
What the 2025 payments were for
- Consulting Fee$17,652 · 6 payments
- Travel and Lodging$2,535 · 10 payments
- Food and Beverage$735.95 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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