NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Don Zwickler, M.D.

Endocrinology, Diabetes & Metabolism Physician in Pomona, NY · enumerated 2006 · practices at Endocrine Associates of Rockland, LLP.

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

National Provider Identifier

1255409553

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Registry record

Entity type Individual (Type 1)
Name Don Zwickler
Credential M.D.
Sex Male
Practice address 5b Medical Park Dr, Pomona, NY, 10970
Phone (845) 362-3111
Enumeration date Dec 4, 2006
Last updated in NPPES May 7, 2008

Taxonomy & licenses

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 165180 (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
1598934200 Other NY GROUP NPI
1255409553 Other NY NPI
1474542 Medicaid NY -

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 1255409553 active?
Yes, as of the latest NPPES snapshot, NPI 1255409553 is active (record last updated 2008-05-07).
How do I verify Don Zwickler's NPI record?
Cross-check NPI 1255409553 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 2008-05-07.