Dr. James O'brien, MD
About This Business
Dr. James O'brien, MD, is an internal medicine physician in Irvine, California, with 34 years of experience since graduating from New York Medical College in 1992, above the 30-year average among the 103 Irvine physicians in our directory. He holds an active California license and has been registered with the national provider registry since 2006. He is affiliated with Hoag Memorial Hospital Presbyterian and UCI Health-Orange. Medicare acceptance is not listed in his profile, and telehealth is not listed among his services. He is one of 15 internal medicine physicians in our Irvine directory. Patients rate him 5.0 across 8 reviews.
Verified Provider Info
- Specialty (per registry)
- Internal Medicine
- NPI Number
- 1922188168
- Medical school graduate
- 1992 (34+ years of practice)
- Medical school
- NEW YORK MEDICAL COLLEGE
- State license
- 000000G78458 (CA)
- Hospital affiliations
- Hoag Memorial Hospital Presbyterian · Uci Health-Orange
Source: NPPES NPI Registry (CMS) · CMS Doctors & Clinicians dataset · checked 2026-08-18
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Information last updated: August 23, 2026
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