Gary G. Zhao, MD
NPI 1124114285ActiveIndividual· Internal Medicine, Hematology & Oncology· San Jose, CA
Internal Medicine, Hematology & Oncology (MD) with County of Santa Clara, practicing in San Jose, California. Their prescriptions cost Medicare Part D more than their services did: $2,987,000 for 735 claims, against $50,796 paid for services in 2024. Astrazeneca Pharmaceuticals LP reported $230.82 in payments in 2025, mostly food and beverage. Lists Santa Clara Valley Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1124114285 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 5, 2006 |
| Last updated in NPPES | Sep 12, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A83349 | 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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 429 |
|---|---|
| Services billed | 764 across 14 procedure codes |
| Paid by Medicare | $50,796 |
Part D prescriptions in 2024
| Prescriptions (claims) | 735 · 804 30-day fills |
|---|---|
| Patients | 92 |
| Total drug cost | $2,987,000 |
| Generic share | 69% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- County of Santa ClaraSan Jose, CA · 1,022 clinicians
Hospital affiliations
- Santa Clara Valley Medical CenterSan Jose, CA
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$230.82 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $230.82 | 2 |
What the 2025 payments were for
- Food and Beverage$230.82 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 17 hematologist-oncologists in San Jose · All hematologist-oncologists in California