Internal Medicine - Nephrology Specialists in Castro Valley, CA
Browse 4 Internal Medicine - Nephrology providers listed in NPPES with a practice address in Castro Valley, California.
How Castro Valley compares with the U.S.
4 active clinicians in Internal Medicine - Nephrology list a practice address in Castro Valley, CA in the NPI registry.
With fewer than 10 clinicians, rates per 100,000 residents are not reliable enough to compare.
Too few clinicians in Internal Medicine - Nephrology in Castro Valley are listed in the CMS Medicare file to report Medicare assignment or telehealth shares.
These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.
Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com · Methodology
Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026.
Dr. Gene-Yuan Chang , MD
Internal Medicine - Nephrology
Dr. Vineetha Rangarajan , DO
Internal Medicine - Nephrology
Dr. Rahul Rishi , MD
Internal Medicine - Nephrology
Dr. Kathryn Welty , MD
Internal Medicine - Nephrology
Frequently Asked Questions about Internal Medicine - Nephrology in Castro Valley
Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the California licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.
This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.
Other Specialties in Castro Valley
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