Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

James D O'Brien, MD

Individual provider Internal Medicine Physician · NPI 1922188168

James D O'Brien, MD is an Internal Medicine in Irvine, California. Graduated from New York Medical College in 1992, 34 years ago. Practices with Spectrum Internal Medicine Associates, Inc a Professional Corporation, a 2-clinician group. Licensed in California.

Years since qualifying
34
Trained at
New York Medical College
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

4870 Barranca Pkwy Ste 250
Irvine, CA 92604-4709
Phone: (949) 272-3800
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 000000G78458 (CA)

Record details

NPI number1922188168
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 16, 2006
Last updated in NPPESApril 23, 2013
Mailing addressPo Box 60099, Irvine, CA 92602-6003

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1992 (34 years in practice)
Group practice Spectrum Internal Medicine Associates, Inc. A Professional Corporation — 2 clinicians
Accepts Medicare assignment Not indicated

Other providers in Irvine