Wan-Yin Chan, M.D.
NPI 1932391471ActiveIndividual· Allergy & Immunology· Orange, CA
Allergy & Immunology (M.D.) with Childrens Hospital of Orange County, practicing in Orange, California. Part D covered 147 prescriptions written in 2024, 39% of them generic. Csl Behring was the largest of 14 companies reporting payments in 2025, $5,787 in all, mostly consulting fees.
Overview
| NPI | 1932391471 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 17, 2007 |
| Last updated in NPPES | Jan 9, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | A101604 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Pediatric Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 147 · 262 30-day fills |
|---|---|
| Patients | 25 |
| Total drug cost | $203,224 |
| Generic share | 39% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Pediatric Medicine |
| Secondary specialties | Allergy/Immunology |
Medical group
- Childrens Hospital of Orange CountyOrange, CA · 73 clinicians
Industry payments (Open Payments)
- 2025$5,787 · 72 payments from 14 companies
- 2024$5,472 · 73 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Csl Behring | $4,590 | 22 |
| Regeneron Healthcare Solutions, Inc. | $335.40 | 10 |
| Genzyme Corporation | $233.69 | 17 |
| Takeda Pharmaceuticals U.S.A., Inc. | $145.86 | 5 |
| Genentech USA, Inc. | $85.25 | 3 |
What the 2025 payments were for
- Consulting Fee$3,353 · 1 payment
- Food and Beverage$2,031 · 66 payments
- Travel and Lodging$308.32 · 3 payments
- Education$94.42 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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