Melissa Zheng Yan Wu, M.D.
NPI 1053585331ActiveIndividual· Internal Medicine· Los Gatos, CA
Internal Medicine (M.D.) in Los Gatos, California, trained at George Washington University School of Medicine (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $251,731 for 2,143 claims, against $59,854 paid for services in 2024. Pfizer Inc. was the largest of 15 companies reporting payments in 2025, $658.73 in all, mostly food and beverage.
Overview
| NPI | 1053585331 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 17, 2008 |
| Last updated in NPPES | Oct 1, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A103411 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 157 |
|---|---|
| Services billed | 1,068 across 21 procedure codes |
| Paid by Medicare | $59,854 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,143 · 4,956 30-day fills |
|---|---|
| Patients | 161 |
| Total drug cost | $251,731 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- El Camino HealthMountain View, CA
- Good Samaritan HospitalSan Jose, CA
- Stanford Health CareStanford, CA
Other facilities
- Health Link Home Health AgencyHome health agency · San Francisco, CA
- Sequoia Home HealthHome health agency · Milpitas, CA
- The Terraces of Los GatosNursing home · Los Gatos, CA
Industry payments (Open Payments)
- 2025$658.73 · 31 payments from 15 companies
- 2024$776.97 · 38 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $149.26 | 8 |
| Astrazeneca Pharmaceuticals LP | $65.55 | 3 |
| Glaxosmithkline, LLC. | $62.96 | 3 |
| Exact Sciences Corporation | $58.97 | 3 |
| Lilly USA, LLC | $48.89 | 2 |
What the 2025 payments were for
- Food and Beverage$658.73 · 31 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 67 internal medicine physicians in Los Gatos · All internal medicine physicians in California