Quick answers
- Does Gustavo A. Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Gustavo A. Diaz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Gustavo A. Diaz's NPI number?
- 1538122635. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Gustavo A. Diaz is enrolled with Medicare (CMS data updated October 2, 2026).
- 190 Leavesley Rd, Suite 102Gilroy, CA 95020 (408) 848‑0444
- 615 Ocean StSanta Cruz, CA 95060 (831) 425‑7991
- 988 Walsh AveSanta Clara, CA 95050 (408) 988‑6868
Group practices
Medicare enrollment lists Gustavo A. Diaz as a member of these groups (CMS data updated October 2, 2026).
- American Current Care of California a Medical Corporation130 clinicians in the group
- Doctors on Duty Medical Group, Inc64 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in American Current Care of California a Medical Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical Branch At Galveston |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538122635 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians