Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ann M Stewart, NP

Q: What is the NPI number for Ann Stewart?

The National Provider Identifier (NPI) for Ann Stewart is 1811959174, a Type 1 (individual) record in the CMS NPPES registry.

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

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

National Provider Identifier

1811959174

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Registry record

Entity type Individual (Type 1)

Name Ann M Stewart

Credential NP

Sex Female

Practice address 1611 Cambridge St, Cambridge, MA, 02138

Phone (617) 661-5500

Fax (617) 661-5444

Enumeration date Apr 3, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 114492 (MA) Secondary

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 114492 (MA) Primary

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
NP1285	Other	MA	BLUE CROSS
0359670	Medicaid	MA	-
N298	Other	MA	HARVARD PILGRIM

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

What is the NPI number for Ann Stewart?

The National Provider Identifier (NPI) for Ann Stewart is 1811959174, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ann Stewart practice?

The practice location on file with NPPES is in Cambridge, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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