HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

SIYI ZHANG, OD

OPTOMETRY

Medical school: SOUTHERN CALIFORNIA COLLEGE OF OPTOMETRY

Graduated: 2023

NPI: 1679251102

Practice Locations (1)

THOMAS S TOOMA M D A PROFESSIONAL CORPORATION

4220 VON KARMAN AVE, SUITE 100

NEWPORT BEACH, CA 926602056

9498547400

Source: CMS National Downloadable File, September 2026.

SIYI ZHANG, OD | HealthCareAtlasUSA