Browse Health
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Christopher O'Brien:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

View full profile

Patient Reviews

Have you visited Dr. O'Brien? Share your experience.
Write a Review

Specialties & Research

Dr. Christopher O'Brien, MD is board certified in Internal Medicine and Infectious Disease.

  • He has special expertise in 3 areas:
  • AIDS/HIV (Acquired Immunodeficiency Syndrome)
  • HIV Infections
  • Hepatitis C

Education & Awards

Dr. O'Brien graduated from Case Western Reserve University , Cleveland.


Dr. O'Brien has 3 hospital affiliations:

  • Kaiser Permanente San Diego Medical Center 
  • UC San Diego Health System 
  • San Diego Medical Center 

> > > > Dr. Christopher O'Brien, MD

Similar doctors nearby

Dr. Alan Elliott

Internal Medicine
38 years experience
San Diego, CA

Dr. Hui-I Hsieh

Internal Medicine
San Diego, CA

Dr. Caroline Lin

Internal Medicine
8 years experience
San Diego, CA

Dr. Linda Jue

Internal Medicine
29 years experience
San Diego, CA

Dr. Gene Yang

Internal Medicine
14 years experience
San Diego, CA

Dr. Vi Bowman

Internal Medicine
7 years experience
San Diego, CA
Search All Similar Doctors
Additional Information
Dr. Christopher Mark O'Brien MD is a male Internist, has 14 years of experience and practices in Internal Medicine and Infectious Disease.
Where does Dr. Christopher M. O'Brien practice?
Dr. Christopher O'Brien has 1 office location.
Dr. Christopher O'Brien practices Internal Medicine and Infectious Disease near San Diego, CA.
See San Diego Internists and San Diego Infectious Disease Doctors.