Doctor profile · Federal record
Dr. James O'Brien, MD
Internal Medicine Physician (CMS: Internal Medicine) · Irvine, CA
- NPI 1922188168
- 34 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
4870 Barranca Pkwy, Suite 250
Irvine, CA 926044709
(949) 272-3800 - Mailing address
-
Po Box 60099
Irvine, CA 926026003
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- April 23, 2013
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #000000G78458
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1922188168. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
484
Distinct HCPCS
4
Medicare allowed
$52,679
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 289 | 129 | $133 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 146 | 76 | $92 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 27 | 24 | $15 | |
G0444 |
Annual depression screening, 5 to 15 minutes | 22 | 22 | $20 |
In context: peer comparison
Among 37 peers in Irvine Internal Medicine Physician, average services per provider: 103. This provider delivers 4.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,316
Patients
375
Total drug cost
$19,099
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 250 | 74 | $2,789 |
| Amlodipine Besylate | Generic | 172 | 46 | $1,343 |
| Rosuvastatin Calcium | Generic | 153 | 50 | $2,878 |
| Levothyroxine Sodium | Generic | 116 | 33 | $2,251 |
| Metformin Hcl ER (Metformin Hcl) | Brand | 82 | 22 | $1,463 |
| Lisinopril | Generic | 78 | 22 | $722 |
| Losartan Potassium | Generic | 74 | 22 | $778 |
| Zolpidem Tartrate | Generic | 60 | 12 | $558 |
| Famotidine | Generic | 58 | 20 | $868 |
| Valsartan | Generic | 50 | 17 | $1,472 |
Hospital affiliations
Frequently asked questions
What is Dr. James O'Brien's medical specialty?
Dr. James O'Brien practices Internal Medicine Physician in Irvine, CA.
Where does Dr. James O'Brien practice?
Dr. James O'Brien practices at 4870 Barranca Pkwy, Irvine, CA 926044709. Office phone: 9492723800.
What is Dr. James O'Brien's NPI?
Dr. James O'Brien's National Provider Identifier (NPI) is 1922188168, issued by NPPES.
Does Dr. James O'Brien accept Medicare assignment?
Dr. James O'Brien does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. James O'Brien commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (HCPCS 93000). Source: CMS Medicare Physician & Other Practitioners file.