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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM CURTIN
NPI 1558229120
Social Worker - Clinical in Philadelphia, PA

Active since January 13, 2026
2101 CHESTNUT ST UNIT 1604, PHILADELPHIA, PA 19103(267) 290-9205 Get Directions Write a Review

NPPES record last updated: September 21, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Sep 21, 2026, Jan 13, 2026 (2 updates tracked since 2026).

About William Curtin NPPES

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

WILLIAM CURTIN (NPI 1558229120) is a healthcare organization registered as a clinical in Philadelphia, Pennsylvania and active in the NPI registry since January 2026. The organization lists William Curtin, Owner, as its authorized official.

NPPES Registry Identity

NPI1558229120
Entity TypeOrganization
Primary Taxonomy1041C0700X
Legal Business NameWILLIAM CURTIN
Location Address2101 CHESTNUT ST UNIT 1604Philadelphia, PA 19103-3139
Mailing Address2101 Chestnut St Unit 1604Philadelphia, PA 19103-3139 · (267) 663-6773
Phone(267) 290-9205
Organization SubpartNo
Authorized OfficialWilliam CurtinOwner · (267) 663-6773
Enumeration DateJanuary 13, 2026
Last NPPES UpdateSeptember 21, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 21, 2026
✔ NPI 1558229120 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
2101 CHESTNUT ST UNIT 1604, Philadelphia, PA 19103
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

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 William Curtin's NPI number?

The NPI number for William Curtin is 1558229120. It was assigned to this organization in the NPPES registry on January 13, 2026.

Where is William Curtin located?

William Curtin is located at 2101 Chestnut St Unit 1604, Philadelphia, PA 19103. The listed phone number is (267) 290-9205.

What is William Curtin's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for William Curtin was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 55 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.