Gustavo A. Diaz, MD
NPI 1538122635ActiveIndividual· Emergency Medicine· Redwood City, CA
Emergency Medicine (MD) in Redwood City, California, trained at University of Texas Medical Branch at Galveston (class of 1982). Part D covered 31 prescriptions written in 2024, 100% of them generic. Astrazeneca Pharmaceuticals LP reported $38.11 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1538122635 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 10, 2006 |
| Last updated in NPPES | Mar 16, 2026 |
| Certified by provider | Mar 16, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | C54872 | CA |
| Emergency Medicine | 207P00000X | 53006 | MA |
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 - Emergency Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 31 · 33 30-day fills |
|---|---|
| Patients | 16 |
| Total drug cost | $247.60 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Texas Medical Branch at Galveston |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Emergency Medicine |
Medical groups
- American Current Care of California A Medical CorporationOntario, CA · 130 clinicians
- Doctors on Duty Medical Group, IncMarina, CA · 64 clinicians
Industry payments (Open Payments)
- 2025$38.11 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $38.11 | 1 |
What the 2025 payments were for
- Food and Beverage$38.11 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 40 emergency medicine physicians in Redwood City · All emergency medicine physicians in California