Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ari Hirshfeld

Hospitalist Physician in Ellsworth, ME · enumerated 2019.

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

National Provider Identifier

1881154268

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Registry record

Entity type Individual (Type 1)

Name Ari Hirshfeld

Sex Male

Practice address Ellsworth, ME, 04605

Phone (207) 664-5311

Enumeration date Mar 22, 2019

Last updated in NPPES May 19, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MD26639 (ME) 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.

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Frequently asked questions

How do I verify Ari Hirshfeld's NPI record?

Cross-check NPI 1881154268 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1881154268 active?

Yes, as of the latest NPPES snapshot, NPI 1881154268 is active (record last updated 2023-05-19).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-19.