--- title: "Dr. Cynthia C. Tsui | Nephrologist in Castro Valley, CA | Sutter Health" description: "Dr. Cynthia C. Tsui, M.D., Ph.D. practices Nephrology in Castro Valley, CA and Fremont, CA. Accepting new patients." url: "https://www.sutterhealth.org/find-provider/dr-cynthia-c-tsui-1046234088" --- 1. [Home](https://www.sutterhealth.org/) / 2. [Find a provider](https://www.sutterhealth.org/find-provider) / 3. Cynthia C. Tsui, M.D., Ph.D. ![Cynthia C. Tsui, M.D., Ph.D.](https://dyn.mktgcdn.com/p/yqbadiPqOI1ruD_dGNpUPzDkLs3fnHFPfPXLkpsZRcY/fit=crop,gravity=auto,dpr=2,width=230,height=230) # Cynthia C. Tsui, M.D., Ph.D. ## Nephrology - Accepting new patients [19845 Lake Chabot Rd.Suite 20Castro Valley, CA 94546](https://www.google.com/maps/dir/?api=1&destination=19845+Lake+Chabot+Rd.+Castro+Valley%2C+CA+94546+US) [+1 more location](https://www.sutterhealth.org/find-provider/dr-cynthia-c-tsui-1046234088#provider-locations) ## Schedule appointment [510-925-2126](tel:+15109252126) Jump to: - [About](https://www.sutterhealth.org/find-provider/dr-cynthia-c-tsui-1046234088#provider-about) - [Locations](https://www.sutterhealth.org/find-provider/dr-cynthia-c-tsui-1046234088#provider-locations) - [Services](https://www.sutterhealth.org/find-provider/dr-cynthia-c-tsui-1046234088#provider-services) ## About Dr. Tsui Languages English and Mandarin Gender Female ## Education and training **Medical school:** Saint Louis University School of Medicine **Fellowship:** University of Washington ## Board certifications - Nephrology ## Affiliations ### Medical groups - SEBMF HMO Network ## Care locations 19845 Lake Chabot Rd. Suite 20 Castro Valley, CA 94546 [Get directions](https://www.google.com/maps/dir/?api=1&destination=19845+Lake+Chabot+Rd.+Castro+Valley%2C+CA+94546+US) [510-925-2126](tel:+15109252126) 510-925-4260 39370 Mozart Terrace Suite 106 Fremont, CA 94538 [Get directions](https://www.google.com/maps/dir/?api=1&destination=39370+Mozart+Terrace+Fremont%2C+CA+94538+US) [925-222-5666](tel:+19252225666) 972-428-3630 ## Related services offered by Sutter - [Kidney disease and nephrology](https://www.sutterhealth.org/services/kidney-disease-nephrology) ### Disclaimer _This provider directory is provided as a convenience to you. It is not intended as a recommendation, referral or endorsement of any particular provider. Physicians are not employees or agents of Sutter Health or its subsidiaries. The information is submitted by each doctor and we make no guarantee or warranty as to the accuracy of the information. You should verify the accuracy of the information directly with the provider's office._ _All doctors on this site are in the Sutter system. Doctors meeting your search criteria are presented in order of relevance based on search criteria, based on those providers with appointment availability._ [_Find out more about star ratings_](https://www.sutterhealth.org/star-ratings)_._ ```json {"@context":"https://schema.org","@type":"MedicalOrganization","name":"Sutter Health","@id":"https://www.sutterhealth.org/#medicalorganization","url":"https://www.sutterhealth.org","logo":"https://www.sutterhealth.org/static/images/sutter-health-logo.svg","address":{"@type":"PostalAddress","streetAddress":"2200 River Plaza Drive","addressLocality":"Sacramento","addressRegion":"CA","postalCode":"95833","addressCountry":"US"},"areaServed":{"@type":"AdministrativeArea","name":"California"},"sameAs":["https://www.facebook.com/SutterHealth","https://www.instagram.com/sutterhealth/","https://x.com/SutterHealth","https://www.youtube.com/sutterhealth","https://www.linkedin.com/company/sutter-health","https://en.wikipedia.org/wiki/Sutter_Health"]} ``` ```json {"@context":"https://schema.org","@type":"BreadcrumbList","@id":"https://www.sutterhealth.org/find-provider/dr-cynthia-c-tsui-1046234088#breadcrumblist","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://www.sutterhealth.org/"},{"@type":"ListItem","position":2,"name":"Find a provider","item":"https://www.sutterhealth.org/find-provider"},{"@type":"ListItem","position":3,"name":"Cynthia C. 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