Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Joel S Zaretzky, M.D.

Internal Medicine Physician in Ansonia, CT · enumerated 2005 · practices at Joel Zaretzky M.D.P.C..

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

National Provider Identifier

1285621433

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Registry record

Entity type Individual (Type 1)

Name Dr. Joel S Zaretzky

Credential M.D.

Sex Male

Practice address 199 Wakelee Ave, Ansonia, CT, 06401

Phone (203) 735-5444

Fax (203) 735-1469

Enumeration date Oct 3, 2005

Last updated in NPPES Oct 2, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 19620 (CT) 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

Is NPI 1285621433 active?

Yes, as of the latest NPPES snapshot, NPI 1285621433 is active (record last updated 2007-10-02).

How do I verify Joel Zaretzky's NPI record?

Cross-check NPI 1285621433 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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Joel Zaretzky M.D.P.C. Internal Medicine Physician · Ansonia, CT NPI 1790972859

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-02.