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

MARILYN BETH WILLIAMS MD
NPI 1508812231
Family Medicine - Addiction Medicine in Brighton, MI

Q: What is Marilyn Williams's NPI number?

The NPI number for Marilyn Williams is 1508812231. It was assigned to this individual provider in the NPPES registry on May 25, 2006. The provider is also known as Marilyn Beth Gerstacker.

Q: What is Marilyn Williams's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Addiction Medicine, with taxonomy code 207QA0401X.

Q: When was this NPI record last updated?

The NPPES record for Marilyn Williams was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 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 May 25, 2006

12851 E GRAND RIVER AVE, BRIGHTON HOSPITAL, BRIGHTON, MI 48116(810) 225-2552(810) 227-2270 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Marilyn Beth Williams Md NPPES

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

MARILYN BETH WILLIAMS MD (NPI 1508812231) is an individual addiction medicine provider in Brighton, Michigan, licensed in Michigan (4301033262) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1508812231

Entity TypeIndividualFemale

Primary Taxonomy207QA0401X

Provider Legal NameMARILYN BETH WILLIAMSCredential: MD

Location Address12851 E GRAND RIVER AVE, BRIGHTON HOSPITALBrighton, MI 48116-9969

Mailing Address12851 E Grand River Ave, Brighton HospitalBrighton, MI 48116-9969 · (810) 225-2552 · Fax (810) 227-2270

Phone(810) 225-2552

Fax(810) 227-2270

Sole ProprietorNo

Enumeration DateMay 25, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1508812231 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Addiction MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207QA0401X

License✔ Licensed in MI · 4301033262

Definition

A family medicine physician who specializes in the diagnosis and treatment of addictions.

12851 E GRAND RIVER AVE, Brighton, MI 48116

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Other Names 1

Other Name (5)Marilyn Beth Gerstacker

Other Identifiers 1

Other010H26253MI · Blue Cross

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 Marilyn Williams's NPI number?

The NPI number for Marilyn Williams is 1508812231. It was assigned to this individual provider in the NPPES registry on May 25, 2006. The provider is also known as Marilyn Beth Gerstacker.

Where is Marilyn Williams located?

Marilyn Williams practices at 12851 E Grand River Ave Brighton Hospital, Brighton, MI 48116. The listed phone number is (810) 225-2552.

What is Marilyn Williams's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Addiction Medicine, with taxonomy code 207QA0401X.

When was this NPI record last updated?

The NPPES record for Marilyn Williams was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 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.