NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Diane M Williamson, LMT, CMCE

Massage Therapist in Park Ridge, IL · enumerated 2009 · practices at Park Ridge Multi-Med, S.C..

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

National Provider Identifier

1427381045

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Registry record

Entity type Individual (Type 1)
Name Ms. Diane M Williamson
Credential LMT, CMCE
Sex Female
Practice address Park Ridge, IL, 60068
Phone (847) 387-9445
Enumeration date Sep 14, 2009
Last updated in NPPES Nov 9, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

225700000X Massage Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 227.004157 (IL) 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.

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Frequently asked questions

Where does Diane Williamson practice?
The practice location on file with NPPES is in Park Ridge, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Diane Williamson?
The National Provider Identifier (NPI) for Diane Williamson is 1427381045, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-11-09.