NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gastroenterology Specialists PC

Nurse Practitioner in Ansonia, CT · enumerated 2006 · authorized official Harold Schwartz, Pres PC Physician.

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

National Provider Identifier

1144259029

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Gastroenterology Specialists PC
Practice address 22 Westfield Ave, Ansonia, CT, 06401
Phone (203) 736-9919
Fax (203) 735-2055
Enumeration date Jul 2, 2006
Last updated in NPPES Sep 11, 2025

Taxonomy & classification

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers Primary

Authorized official

Name Harold Schwartz
Title Pres PC Physician
Phone (203) 736-9919

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-09-11. Verify at npiregistry.cms.hhs.gov.
Where is Gastroenterology Specialists PC located?
The practice location on file with NPPES is in Ansonia, CT.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.