20 social workers with a practice address in Castro Valley, from the federal NPI Registry. Alphabetical by last name. Tap a name for the address, phone number and NPI record.
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NPI records don't show insurance, openings or telehealth. Call the office to confirm those before you book.
Clinical social workers (LCSW, LICSW) hold a master's in social work plus supervised clinical hours and a state license, and provide therapy. Other licensed social workers more often do case management and connect people with services. The NPI record says which kind each one is.
Before you call
Ask whether they're taking new patients, which insurance plans they're in, what a session costs without insurance, and whether they see people by video. You can check any clinician's license with your state licensing board, and their NPI record at the CMS NPI Registry.
The NPI Registry lists 20 social workers with a practice address in Castro Valley. Some work only inside a hospital, clinic or school, and a few may have retired without closing their NPI, so the number seeing new patients is lower.
Do these social workers take insurance?
NPI records don't include insurance. Call the office or check your insurer's directory. How coverage works.
How is this list ordered?
Alphabetically by last name. Nobody pays to be listed or to appear higher.
Listings come from the CMS National Plan and Provider Enumeration System (NPI Registry), October 2026 copy. A listing is not a recommendation. Nobody pays to appear here or to rank higher; lists are alphabetical by last name. This page is general information, not medical advice. How we verify