Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark E Williams, LCSW

Clinical Social Worker in Windham, ME · enumerated 2006.

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

National Provider Identifier

1760560072

Verified

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Registry record

Entity type Individual (Type 1)

Name Mark E Williams

Credential LCSW

Sex Male

Practice address 32 Evans Ridge Rd # 2, Windham, ME, 04062

Phone (207) 572-2662

Enumeration date Nov 2, 2006

Last updated in NPPES Mar 15, 2022

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License LC00061300 (NJ) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LC14750 (ME) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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

What is the NPI number for Mark Williams?

The National Provider Identifier (NPI) for Mark Williams is 1760560072, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Williams practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-15.