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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Leigh D. Rosen, MD

Obstetrics & Gynecology Physician in Greenwich, CT · enumerated 2013 · practices at Integrated Reproductive Surgery LLC.

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

National Provider Identifier

1235574559

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Registry record

Entity type Individual (Type 1)
Name Leigh D. Rosen
Credential MD
Sex Female
Practice address 779 North St, Greenwich, CT, 06831
Phone (646) 844-9602
Fax (646) 846-2310
Enumeration date Apr 30, 2013
Last updated in NPPES May 23, 2025

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 289496 (NY) 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
289496 Other NY NYS MEDICAL LICENSE

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 1235574559 active?
Yes, as of the latest NPPES snapshot, NPI 1235574559 is active (record last updated 2025-05-23).
How do I verify Leigh Rosen's NPI record?
Cross-check NPI 1235574559 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 2025-05-23.