Copyright © 2007 - 2011
Mathias Masem, M.D.
All Rights Reserved

Contact Us


80 Grand Avenue
Suite 600

Oakland, CA 94612
Phone: 510-763-0884
FAX: 510-763-8753
1500 Owens Street
San Francisco, CA 94158

Phone: 415-353-2808
FAX: 415-885-9643
Website: UCSF

Hours of Operation

General Office hours are Monday-Friday, 8:00 a.m. to 5:45 p.m.

Oakland Office

Office hours

Dr. Masem's office hours - M, T, F 1:00 pm to 6:45 p.m.
Kelly Weissburg, RN, NP - Mon, Tues ,Thurs, Fri 9:00 to 4:00 p.m and Wed 1:00 to 4:00 p.m.


Our physicians are on call 24 hours a day, seven days a week to care for all of your orthopedic needs. For non-life-threatening emergencies, please call (510) 763-0884

Driving Instructions/Map

Area Map

For your convenience Bay Area Hand Surgery Associates has provided a detailed list of driving directions to our 80 Grand Avenue, Oakland and 450 Sutter Street, San Francisco office.

Patient Forms