Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Irwin Greenspan, MD

Ophthalmology Physician in Bayside, NY · enumerated 2006.

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

National Provider Identifier

1730241621

Verified

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Registry record

Entity type Individual (Type 1)

Name Irwin Greenspan

Credential MD

Sex Male

Practice address 205 20 32 Avenue, Bayside, NY, 11361

Phone (718) 357-5201

Enumeration date Dec 15, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 097079 (NY) 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

Where does Irwin Greenspan practice?

The practice location on file with NPPES is in Bayside, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Irwin Greenspan?

The National Provider Identifier (NPI) for Irwin Greenspan is 1730241621, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.