Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gerald Grodstein, MD

Nephrology Physician in Englewood, NJ · enumerated 2005.

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

National Provider Identifier

1245211440

Verified

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Registry record

Entity type Individual (Type 1)

Name Gerald Grodstein

Credential MD

Sex Male

Practice address 177 N Dean St, Suite 207, Englewood, NJ, 07631

Phone (201) 567-0446

Enumeration date Nov 7, 2005

Last updated in NPPES Nov 8, 2007

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 25MA03799200 (NJ) Primary

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

Other identifiers

Identifier	Type	State	Issuer
BP293	Other	NJ	OXFORD HEALTH
412640	Other	NJ	CIGNA
0K3260	Other	NJ	HEALTH NET

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 Gerald Grodstein?

Gerald Grodstein is registered in NPPES with the primary taxonomy of Nephrology Physician. 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 2007-11-08.