He is in-network for several insurance carriers, including Anthem, Blue Cross/Blue Shield, and CIGNA Plans. After attending the University of California, San Francisco (UCSF), School of Medicine, Dr. Zwass completed his residency training at a hospital affiliated with the University of California, San Francisco (UCSF) and a hospital affiliated with the University of California, San Diego (UCSD). He is conversant in Spanish. His professional affiliations include Sutter Medical Network, Alta Bates Medical Group (ABMG), and UCSF Benioff Children's Hospitals. He has an open panel.