Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

MATTHEW WILLIAMS AMFT
NPI 1275439465
Counselor - Mental Health in South Pasadena, CA

Q: What is Matthew Williams's NPI number?

The NPI number for Matthew Williams is 1275439465. It was assigned to this individual provider in the NPPES registry on October 15, 2026.

Q: What is Matthew Williams's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Q: When was this NPI record last updated?

The NPPES record for Matthew Williams was last updated on October 15, 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.

Active since October 15, 2026

PO BOX 1041 1001 FREMONT AVE, PO BOX 1041, SOUTH PASADENA, CA 91030(765) 860-2807 Get Directions Write a Review

NPPES record added: October 15, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Matthew Williams Amft NPPES

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

MATTHEW WILLIAMS AMFT (NPI 1275439465) is an individual mental health provider in South Pasadena, California, licensed in California (147063) and active in the NPI registry since October 2026.

NPPES Registry Identity

NPI1275439465

Entity TypeIndividualMale

Primary Taxonomy101YM0800X

Provider Legal NameMATTHEW WILLIAMSCredential: AMFT

Location AddressPO BOX 1041 1001 FREMONT AVE, PO BOX 1041South Pasadena, CA 91030-3224

Mailing AddressPo Box 1041 1001 Fremont Ave, Po Box 1041South Pasadena, CA 91030-3224 · (765) 860-2807

Phone(765) 860-2807

Sole ProprietorNo

Enumeration DateOctober 15, 2026

NPPES CertifiedOctober 15, 2026

✔ NPI 1275439465 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers

Taxonomy Code101YM0800X

License✔ Licensed in CA · 147063

PO BOX 1041 1001 FREMONT AVE, South Pasadena, CA 91030

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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 Matthew Williams's NPI number?

The NPI number for Matthew Williams is 1275439465. It was assigned to this individual provider in the NPPES registry on October 15, 2026.

Where is Matthew Williams located?

Matthew Williams practices at PO Box 1041 1001 Fremont Ave PO Box 1041, South Pasadena, CA 91030. The listed phone number is (765) 860-2807.

What is Matthew Williams's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Matthew Williams was last updated on October 15, 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.