Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark W Culleton, L.S.W.

Social Worker in Washington, PA · enumerated 2006.

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

National Provider Identifier

1518909423

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Registry record

Entity type Individual (Type 1)

Name Mark W Culleton

Credential L.S.W.

Sex Male

Practice address 87 E Maiden St, Suite 31, Washington, PA, 15301

Phone (724) 225-3444

Fax (724) 222-2189

Enumeration date Jun 12, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License SW008334L (PA) 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 Mark Culleton practice?

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

What is the NPI number for Mark Culleton?

The National Provider Identifier (NPI) for Mark Culleton is 1518909423, 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 2007-07-08.