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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jason Adam Klein, M.D.

Pediatric Endocrinology Physician in Commack, NY · enumerated 2009.

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

National Provider Identifier

1033358676

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Registry record

Entity type Individual (Type 1)
Name Dr. Jason Adam Klein
Credential M.D.
Sex Male
Practice address 500 Commack Rd, Commack, NY, 11725
Phone (631) 444-5437
Fax (631) 638-0157
Enumeration date Feb 4, 2009
Last updated in NPPES Mar 25, 2026

Taxonomy & licenses

2080P0210X Pediatric Nephrology Physician Allopathic & Osteopathic Physicians · License 255029 (NY) Secondary
2080P0205X Pediatric Endocrinology Physician Allopathic & Osteopathic Physicians · License 255029 (NY) 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 Jason Klein's NPI record?
Cross-check NPI 1033358676 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1033358676 active?
Yes, as of the latest NPPES snapshot, NPI 1033358676 is active (record last updated 2026-03-25).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-25.