Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Anne Elizabeth Allen, BSN, RN, FNP-S

Nurse Practitioner in Billings, MT · enumerated 2023.

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

National Provider Identifier

1538944632

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Registry record

Entity type Individual (Type 1)

Name Mrs. Anne Elizabeth Allen

Credential BSN, RN, FNP-S

Sex Female

Practice address 1500 University Dr, Billings, MT, 59101

Phone (406) 994-3597

Enumeration date Aug 28, 2023

Last updated in NPPES Sep 9, 2025

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License NUR-APRN-LIC-267088 (MT) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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 specialty is Anne Allen?

Anne Allen is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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