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Registered Dietitian in Castro Valley, California

Data updated monthly · Last refresh September 2026

6 Registered Dietitian providers practice in Castro Valley. Listings are drawn from federal public records and are not endorsements.

Registered Dietitian providers in Castro Valley

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Helena Chung, RD, MPH
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 727-3204
Dr. Jiaqi Yang, R.D.
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 886-3400
Dr. Kara Boller, RD
Castro Valley, CA · No drug or device payments recorded (2025) · (805) 754-6433
Dr. Nayoung Song, RD
Castro Valley, CA · No drug or device payments recorded (2025) · (415) 985-5933
Dr. Sophie Baylon, RD
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 432-7217
Dr. Taylor Demasi, RD
Castro Valley, CA · No drug or device payments recorded (2025) · (510) 305-8175

Common questions

How many Registered Dietitian providers are in Castro Valley, California?

There are 6 Registered Dietitian providers with active NPI records practicing in Castro Valley, according to federal NPPES data refreshed monthly.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Castro Valley Registered Dietitian across California

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.