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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MARK W CULLETON L.S.W.
NPI 1518909423
Social Worker in Washington, PA

Active since June 12, 2006
87 E MAIDEN ST, SUITE 31, WASHINGTON, PA 15301(724) 225-3444(724) 222-2189 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mark W Culleton L.s.w. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK W CULLETON L.S.W. (NPI 1518909423) is an individual social worker in Washington, Pennsylvania, licensed in Pennsylvania (SW008334L) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1518909423
Entity TypeIndividualMale
Primary Taxonomy104100000X
Provider Legal NameMARK W CULLETONCredential: L.S.W.
Location Address87 E MAIDEN ST, SUITE 31Washington, PA 15301-4964
Mailing Address87 E Maiden St, Suite 31Washington, PA 15301-4964 · (724) 225-3444 · Fax (724) 222-2189
Phone(724) 225-3444
Fax(724) 222-2189
Sole ProprietorNo
Enumeration DateJune 12, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1518909423 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
License✔ Licensed in PA · SW008334L
Definition

A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.

87 E MAIDEN ST, Washington, PA 15301
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Other Providers at the Same Location NPPES 12

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WASHINGTON PSYCHOLOGICAL SERVICES
Psychologist (Clinical)
87 E MAIDEN ST, SUITE #2
WASHINGTON, PA 15301
Washington County (724) 222-8525
COMPREHENSIVE COUNSELING OF WASHINGTON PA
Counselor (Mental Health)
87 E MAIDEN ST, SUITE 31
WASHINGTON, PA 15301
Washington County (724) 225-3444
GERARD H WEISS L.C.S.W.
Social Worker (Clinical)
87 E MAIDEN ST, SUITE31
WASHINGTON, PA 15301
Washington County (724) 225-3444
DR. JOHN MICHAEL CRABTREE PHD
Psychologist
87 E MAIDEN ST, SUITE 38
WASHINGTON, PA 15301
Washington County (724) 222-8525
MARY PAIGE PILLOW LCSW
Social Worker (Clinical)
87 E MAIDEN ST, SUITE #2
WASHINGTON, PA 15301
Washington County (724) 222-8575
MISS ALEXA KIM STACHER LCSW
Social Worker (Clinical)
87 E MAIDEN ST, SUITE #2
WASHINGTON, PA 15301
Washington County (724) 222-8525
MS. MARY ELEANOR SCHAFFER MA, LPC, ALPS
Counselor (Professional)
87 E MAIDEN ST, SUITE #2
WASHINGTON, PA 15301
Washington County (304) 745-5065
COMPREHENSIVE COUSELING, LLP
Community/Behavioral Health
87 E MAIDEN ST
WASHINGTON, PA 15301
Washington County (724) 225-3444

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Culleton's NPI number?

The NPI number for Mark Culleton is 1518909423. It was assigned to this individual provider in the NPPES registry on June 12, 2006.

Where is Mark Culleton located?

Mark Culleton practices at 87 E Maiden St Suite 31, Washington, PA 15301. The listed phone number is (724) 225-3444.

What is Mark Culleton's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

When was this NPI record last updated?

The NPPES record for Mark Culleton was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.