Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Joan T Gewirtz, MD

Ophthalmology Physician in Stamford, CT · enumerated 2006.

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

National Provider Identifier

1588740757

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Registry record

Entity type Individual (Type 1)

Name Mrs. Joan T Gewirtz

Credential MD

Sex Female

Practice address 70 Mill River St, Stamford, CT, 06902

Phone (203) 348-0868

Fax (203) 975-5286

Enumeration date Oct 31, 2006

Last updated in NPPES May 4, 2011

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 028538 (CT) 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
001285386	Medicaid	CT	-

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 1588740757 active?

Yes, as of the latest NPPES snapshot, NPI 1588740757 is active (record last updated 2011-05-04).

How do I verify Joan Gewirtz's NPI record?

Cross-check NPI 1588740757 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 2011-05-04.