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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. ALVIN DEAN WILLIAMSON
NPI 1164749198
Counselor - Addiction (Substance Use Disorder) in Dallas, TX

Active since April 30, 2010
3409 NAVAJO COURT, DALLAS, TX 75224(469) 879-3727(214) 375-4453 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

About Mr. Alvin Dean Williamson NPPES

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

MR. ALVIN DEAN WILLIAMSON (NPI 1164749198) is an individual addiction (substance use disorder) provider in Dallas, Texas and active in the NPI registry since April 2010.

NPPES Registry Identity

NPI1164749198
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameMR. ALVIN DEAN WILLIAMSON
Location Address3409 NAVAJO COURTDallas, TX 75224-3726
Mailing Address3409 Navajo CourtDallas, TX 75224-3726 · (469) 879-3727 · Fax (214) 375-4453
Phone(469) 879-3727
Fax(214) 375-4453
Sole ProprietorYes
Enumeration DateApril 30, 2010
Last NPPES UpdateSeptember 29, 2026
✔ NPI 1164749198 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
3409 NAVAJO COURT, Dallas, TX 75224
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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 Alvin Williamson's NPI number?

The NPI number for Alvin Williamson is 1164749198. It was assigned to this individual provider in the NPPES registry on April 30, 2010.

Where is Alvin Williamson located?

Alvin Williamson practices at 3409 Navajo Court, Dallas, TX 75224. The listed phone number is (469) 879-3727.

What is Alvin Williamson's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for Alvin Williamson was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 days 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.