MR. JOHN BARRY WILLIAMSON D.D.S.
NPI 1699924712
Dentist in San Leandro, CA

Q: What is John Williamson's NPI number?

The NPI number for John Williamson is 1699924712. It was assigned to this individual provider in the NPPES registry on September 12, 2008.

Q: What is John Williamson's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Q: When was this NPI record last updated?

The NPPES record for John Williamson was last updated on September 12, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since September 12, 2008

1450 BANCROFT AVE., SAN LEANDRO, CA 94577(510) 483-2412(510) 483-2517 Get Directions Write a Review

NPPES record last updated: September 12, 2008. Verified against the NPPES registry weekly; last sync: August 23, 2026.

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About Mr. John Barry Williamson D.d.s. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. JOHN BARRY WILLIAMSON D.D.S. (NPI 1699924712) is an individual dentist in San Leandro, California, licensed in California (33404) and active in the NPI registry since September 2008.

NPPES Registry Identity

NPI1699924712

Entity TypeIndividualMale

Primary Taxonomy122300000X

Provider Legal NameMR. JOHN BARRY WILLIAMSONCredential: D.D.S.

Location Address1450 BANCROFT AVE.San Leandro, CA 94577

Mailing Address1450 Bancroft Ave.San Leandro, CA 94577 · (510) 483-2412 · Fax (510) 483-2517

Phone(510) 483-2412

Fax(510) 483-2517

Sole ProprietorNo

Enumeration DateSeptember 12, 2008

✔ NPI 1699924712 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers

Taxonomy Code122300000X

License✔ Licensed in CA · 33404

Definition

A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.

1450 BANCROFT AVE., San Leandro, CA 94577

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Williamson's NPI number?

The NPI number for John Williamson is 1699924712. It was assigned to this individual provider in the NPPES registry on September 12, 2008.

Where is John Williamson located?

John Williamson practices at 1450 Bancroft Ave., San Leandro, CA 94577. The listed phone number is (510) 483-2412.

What is John Williamson's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

When was this NPI record last updated?

The NPPES record for John Williamson was last updated on September 12, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.