Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Melissa Lynn Williams, LMSW

Clinical Social Worker in Mattawan, MI · enumerated 2020.

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

National Provider Identifier

1649886607

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Registry record

Entity type Individual (Type 1)

Name Mrs. Melissa Lynn Williams

Credential LMSW

Sex Female

Practice address 41221 Chickadee St, Mattawan, MI, 49071

Phone (269) 341-8888

Enumeration date Sep 16, 2020

Last updated in NPPES Jul 10, 2025

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 6801092703 (MI) Primary

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

Is NPI 1649886607 active?

Yes, as of the latest NPPES snapshot, NPI 1649886607 is active (record last updated 2025-07-10).

How do I verify Melissa Williams's NPI record?

Cross-check NPI 1649886607 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-10.