Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marilyn Beth Williams, MD

Addiction Medicine (Family Medicine) Physician in Brighton, MI · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1508812231

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Registry record

Entity type Individual (Type 1)

Name Marilyn Beth Williams

Credential MD

Sex Female

Practice address 12851 E Grand River Ave, Brighton Hospital, Brighton, MI, 48116

Phone (810) 225-2552

Fax (810) 227-2270

Enumeration date May 25, 2006

Last updated in NPPES Jul 13, 2026

Taxonomy & licenses

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 4301033262 (MI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Marilyn Williams practice?

The practice location on file with NPPES is in Brighton, MI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Marilyn Williams?

The National Provider Identifier (NPI) for Marilyn Williams is 1508812231, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-13.