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

Mr. Craig Lee Williamson, MS OT

Occupational Therapist in Brunswick, ME · enumerated 2006.

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

National Provider Identifier

1619925351

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Registry record

Entity type Individual (Type 1)

Name Mr. Craig Lee Williamson

Credential MS OT

Sex Male

Practice address Brunswick, ME, 04011

Phone (207) 415-9514

Fax (207) 721-8664

Enumeration date May 5, 2006

Last updated in NPPES Feb 14, 2024

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

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License OT1060 (ME) Primary

Other identifiers

Identifier	Type	State	Issuer
5652638	Other	-	AETNA PPO
6404211	Other	-	UNITED HEALTHCARE
2071305	Other	-	AETNA HMO
MN22431	Other	-	HARVARD PILGRIM
123152500	Other	-	DEPT OF LABOR ACS
025800	Other	-	ANTHEM

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 Craig Williamson practice?

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

What is the NPI number for Craig Williamson?

The National Provider Identifier (NPI) for Craig Williamson is 1619925351, 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 2024-02-14.