Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stuart R Geffner, M.D.

Specialist in Livingston, NJ · enumerated 2006.

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

National Provider Identifier

1649213422

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Registry record

Entity type Individual (Type 1)

Name Dr. Stuart R Geffner

Credential M.D.

Sex Male

Practice address 94 Old Short Hills Rd, East Wing, Suite 305, Livingston, NJ, 07039

Phone (973) 322-9801

Fax (973) 322-9807

Enumeration date Jun 13, 2006

Last updated in NPPES Feb 17, 2015

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 25MA05451600 (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.

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Frequently asked questions

What specialty is Stuart Geffner?

Stuart Geffner is registered in NPPES with the primary taxonomy of Specialist. 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 2015-02-17.