Dr. James O'brien, MD

Doctor
5.0

8 reviews

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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

Address

4870 Barranca Pkwy
Irvine, CA 92604

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Information last updated: August 23, 2026