Christopher Siyuan Yang, MD
NPI 1174006571ActiveIndividual· Dermatology· Stanford, CA
Dermatology (MD) in Stanford, California, licensed in CA and IL, with an NPI issued in September 2018. Enrolled in Medicare as practitioner - dermatology. Janssen Scientific Affairs, LLC was the largest of 6 companies reporting payments in 2025, $480.78 in all, mostly food and beverage.
Overview
| NPI | 1174006571 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 11, 2018 |
| Last updated in NPPES | Aug 24, 2026 |
| Certified by provider | Aug 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | A208347 | CA |
| Dermatology | 207N00000X | 125.079505 | IL |
| Internal Medicine | 207R00000X | 125.079505 | IL |
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) |
|---|
Industry payments (Open Payments)
- 2025$480.78 · 7 payments from 6 companies
- 2024$209.97 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Scientific Affairs, LLC | $134.59 | 1 |
| Lilly USA, LLC | $124.12 | 2 |
| Organon LLC | $100.75 | 1 |
| Janssen Biotech, Inc. | $55.05 | 1 |
| Takeda Pharmaceuticals U.S.A., Inc. | $34.02 | 1 |
What the 2025 payments were for
- Food and Beverage$480.78 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 62 dermatologists in Stanford · All dermatologists in California