Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gail Mindy Libowsky, NP

Adult Health Nurse Practitioner in Watertown, MA · enumerated 2006.

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

National Provider Identifier

1255390019

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Registry record

Entity type Individual (Type 1)

Name Gail Mindy Libowsky

Credential NP

Sex Female

Practice address 485 Arsenal St, Watertown, MA, 02472

Phone (617) 982-5100

Fax (617) 972-5439

Enumeration date Mar 21, 2006

Last updated in NPPES Nov 16, 2020

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 143806 (MA) Primary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 143806 (MA) Secondary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
NP2001	Other	MA	BLUE CROSS

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 1255390019 active?

Yes, as of the latest NPPES snapshot, NPI 1255390019 is active (record last updated 2020-11-16).

How do I verify Gail Libowsky's NPI record?

Cross-check NPI 1255390019 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-16.