Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. John Barry Williamson, DDS

Individual provider Dentist · NPI 1699924712

Mr. John Barry Williamson, DDS is a Dentist in San Leandro, California. Licensed in California. Registered with an NPI since 2008.

Licensed in
CA
In the registry since
2008
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

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Practice location Address checks out

1450 Bancroft Ave
San Leandro, CA 94577
Phone: (510) 483-2412
Fax: (510) 483-2517
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dentist (primary) Taxonomy 122300000X · Licence 33404 (CA)

Record details

NPI number1699924712
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorNo
NPI enumeratedSeptember 12, 2008
Last updated in NPPESSeptember 12, 2008
Mailing address1450 Bancroft Ave., San Leandro, CA 94577

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