Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allison Izsak, MD

Hospitalist Physician in Newark, NJ · enumerated 2022.

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

National Provider Identifier

1770225583

Verified

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Registry record

Entity type Individual (Type 1)

Name Allison Izsak

Credential MD

Sex Female

Practice address 150 Bergen St, Newark, NJ, 07103

Phone (973) 972-6056

Enumeration date Apr 12, 2022

Last updated in NPPES Jul 16, 2025

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 25MA12577000 (NJ) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

Is NPI 1770225583 active?

Yes, as of the latest NPPES snapshot, NPI 1770225583 is active (record last updated 2025-07-16).

How do I verify Allison Izsak's NPI record?

Cross-check NPI 1770225583 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 2025-07-16.