Doctor profile · Federal record
Dr. Zareth Irwin, MD
Emergency Medicine Physician (CMS: Emergency Medicine) · Orange, CA
- NPI 1912031139
- 22 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
101 the City Dr S
Orange, CA 928683201
(714) 456-8068
fax (714) 456-3765 - Mailing address
-
Po Box 513266
Los Angeles, CA 900513266
Credentials & registration
- NPI registered
- March 2007 — 19 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- California #A95363
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1912031139. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
276
Distinct HCPCS
5
Medicare allowed
$30,886
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 133 | 130 | $173 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 72 | 63 | $8 | |
99284 |
Emergency department visit with moderate level of medical decision making | 31 | 30 | $119 | |
71045 |
X-ray of chest, 1 view | 24 | 24 | $9 | |
99291 |
Critical care, first 30-74 minutes | 16 | 16 | $211 |
In context: peer comparison
Among 51 peers in Orange Emergency Medicine Physician, average services per provider: 60. This provider delivers 4.6× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
12
Patients
12
Total drug cost
$53
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 12 | 12 | $53 |
Frequently asked questions
What is Dr. Zareth Irwin's medical specialty?
Dr. Zareth Irwin practices Emergency Medicine Physician in Orange, CA.
Where does Dr. Zareth Irwin practice?
Dr. Zareth Irwin practices at 101 the City Dr S, Orange, CA 928683201. Office phone: 7144568068.
What is Dr. Zareth Irwin's NPI?
Dr. Zareth Irwin's National Provider Identifier (NPI) is 1912031139, issued by NPPES.
Does Dr. Zareth Irwin accept Medicare assignment?
Dr. Zareth Irwin does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Zareth Irwin commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (HCPCS 93010); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.