Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory J Katz, M.D.

Ophthalmology Physician in Ypsilanti, MI · enumerated 2006.

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

National Provider Identifier

1952364994

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory J Katz

Credential M.D.

Sex Male

Practice address 5477 W Clark Rd, Ypsilanti, MI, 48197

Phone (734) 434-6000

Fax (734) 434-7005

Enumeration date Apr 10, 2006

Last updated in NPPES Jul 7, 2020

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 4301061066 (MI) 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

How do I verify Gregory Katz's NPI record?

Cross-check NPI 1952364994 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1952364994 active?

Yes, as of the latest NPPES snapshot, NPI 1952364994 is active (record last updated 2020-07-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-07.