Zareth Irwin, MD
NPI 1912031139ActiveIndividual· Emergency Medicine· Orange, CA
Emergency Medicine (MD) in Orange, California, trained at Oregon Health Sciences University School of Medicine (class of 2004). 154 Medicare patients in 2024, $20,698 paid; nearly all of their 123 Part D prescriptions were generic (95%).
Overview
| NPI | 1912031139 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 16, 2007 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | A95363 | 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 - Emergency Medicine (OR); Practitioner - Emergency Medicine (TX); Practitioner - Emergency Medicine (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 154 |
|---|---|
| Services billed | 278 across 29 procedure codes |
| Paid by Medicare | $20,698 |
Part D prescriptions in 2024
| Prescriptions (claims) | 123 · 127 30-day fills |
|---|---|
| Patients | 85 |
| Total drug cost | $2,415 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | Oregon Health Sciences University School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Emergency Medicine |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 181 emergency medicine physicians in Orange · All emergency medicine physicians in California