MARY MARGARET WILLIAMS RN
NPI 1659459121
Registered Nurse - Psychiatric/Mental Health in Roseville, CA

Q: What is Mary Williams's NPI number?

The NPI number for Mary Williams is 1659459121. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Q: What is Mary Williams's specialty?

The primary specialty registered for this NPI is Registered Nurse, specializing in Psychiatric/Mental Health, with taxonomy code 163WP0808X.

Q: When was this NPI record last updated?

The NPPES record for Mary Williams was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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 November 01, 2006

219 ESTATES DR, STE #101, ROSEVILLE, CA 95678(916) 784-3555 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Mary Margaret Williams Rn NPPES

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

MARY MARGARET WILLIAMS RN (NPI 1659459121) is an individual psychiatric/mental health provider in Roseville, California, licensed in California (P249) and active in the NPI registry since November 2006.

NPPES Registry Identity

NPI1659459121

Entity TypeIndividualFemale

Primary Taxonomy163WP0808X

Provider Legal NameMARY MARGARET WILLIAMSCredential: RN

Location Address219 ESTATES DR, STE #101Roseville, CA 95678-2391

Mailing Address412 Roundtree CtSacramento, CA 95831-2851 · (916) 393-0568

Phone(916) 784-3555

Sole ProprietorNo

Enumeration DateNovember 1, 2006

Last NPPES UpdateSeptember 11, 2025

✔ NPI 1659459121 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRegistered Nurse · Psychiatric/Mental HealthNursing Service Providers

Taxonomy Code163WP0808X

License✔ Licensed in CA · P249

Also ListedRegistered NurseTaxonomy 163W00000X · License 200960 (CA)

219 ESTATES DR, Roseville, CA 95678

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Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DENISE GILPATRIC LCSW

Social Worker (Clinical)

219 ESTATES DR, # 108
ROSEVILLE, CA 95678

Placer County (916) 781-2060

MS. MAEVE D. HASSETT MSW

Social Worker (Clinical)

219 ESTATES DR, SUITE 108
ROSEVILLE, CA 95678

Placer County (916) 772-3154

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 Mary Williams's NPI number?

The NPI number for Mary Williams is 1659459121. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Mary Williams located?

Mary Williams practices at 219 Estates Dr Ste #101, Roseville, CA 95678. The listed phone number is (916) 784-3555.

What is Mary Williams's specialty?

The primary specialty registered for this NPI is Registered Nurse, specializing in Psychiatric/Mental Health, with taxonomy code 163WP0808X.

When was this NPI record last updated?

The NPPES record for Mary Williams was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.