Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Zachary W Landau, D.O.

Emergency Medicine Physician in Waterbury, CT · enumerated 2016 · practices at Saint Mary'S Hospital, Inc..

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

National Provider Identifier

1558718676

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Registry record

Entity type Individual (Type 1)

Name Mr. Zachary W Landau

Credential D.O.

Sex Male

Practice address 56 Franklin St Ste 1, Waterbury, CT, 06706

Phone (203) 709-6000

Enumeration date May 18, 2016

Last updated in NPPES Mar 31, 2025

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 328292 (NY) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 77372 (CT) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Zachary Landau's NPI record?

Cross-check NPI 1558718676 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1558718676 active?

Yes, as of the latest NPPES snapshot, NPI 1558718676 is active (record last updated 2025-03-31).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-31.