Dr. O'Brien is on Doximity
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Office
3100 Summitt Street
2nd Floor
Oakland, CA 94609Phone+1 510-869-8400
Education & Training
- University of California (San Francisco)Internship, Internal Medicine, 1990 - 1991
- University of Washington School of MedicineClass of 1990
Certifications & Licensure
- CA State Medical License 1992 - 2025
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