Ahdad Ziyar
NPI 1205330685ActiveIndividual· Allergy & Immunology· Santa Ana, CA
Allergy & Immunology in Santa Ana, California, trained at University of Florida College of Medicine (class of 2018). In 2024 Medicare paid $14,764 for 28 patients, and Part D covered 82 of their prescriptions, 88% of them generic. Greer Laboratories, Inc. was the largest of 3 companies reporting payments in 2025, $166.09 in all, mostly food and beverage.
Overview
| NPI | 1205330685 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Mar 21, 2018 |
| Last updated in NPPES | Dec 30, 2025 |
| Certified by provider | Dec 30, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | A164647 | CA |
| Internal Medicine, Allergy & Immunology | 207RA0201X | A164647 | 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 - Allergy/Immunology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 28 |
|---|---|
| Services billed | 912 across 10 procedure codes |
| Paid by Medicare | $14,764 |
Part D prescriptions in 2024
| Prescriptions (claims) | 82 · 91 30-day fills |
|---|---|
| Patients | 30 |
| Total drug cost | $10,518 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Florida College of Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Internal Medicine |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Hospital affiliation
- Kaiser Foundation Hospital - DowneyDowney, CA
Industry payments (Open Payments)
- 2025$166.09 · 3 payments from 3 companies
- 2024$77.33 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Greer Laboratories, Inc. | $103.44 | 1 |
| Regeneron Healthcare Solutions, Inc. | $39.91 | 1 |
| Janssen Pharmaceuticals, Inc | $22.74 | 1 |
What the 2025 payments were for
- Food and Beverage$166.09 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records