Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Abigail Elizabeth Flagg

Clinical Social Worker in Holyoke, MA · enumerated 2026.

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

National Provider Identifier

1164373445

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Abigail Elizabeth Flagg

Sex Female

Practice address 130 Pine St, Holyoke, MA, 01040

Phone (413) 571-5761

Enumeration date Feb 4, 2026

Last updated in NPPES Feb 4, 2026

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCSW2120225 (MA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1164373445 active?

Yes, as of the latest NPPES snapshot, NPI 1164373445 is active (record last updated 2026-02-04).

How do I verify Abigail Flagg's NPI record?

Cross-check NPI 1164373445 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-04.