Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jeff Myron Gruen

Pediatrics Physician in Suffern, NY · enumerated 2025.

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

National Provider Identifier

1164227161

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Registry record

Entity type Individual (Type 1)

Name Dr. Jeff Myron Gruen

Sex Male

Practice address 400 Rella Blvd, Suffern, NY, 10901

Phone (202) 281-6917

Enumeration date Feb 14, 2025

Last updated in NPPES Feb 14, 2025

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 198448 (NY) 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

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.

What specialty is Jeff Gruen?

Jeff Gruen is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-14.