Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregg Michael Knel

Specialist in Port Jefferson, NY · enumerated 2016.

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

National Provider Identifier

1023469814

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Registry record

Entity type Individual (Type 1)

Name Gregg Michael Knel

Sex Male

Practice address 106 Nadia Ct, Port Jefferson, NY, 11777

Phone (917) 747-1435

Enumeration date Jun 23, 2016

Last updated in NPPES Jun 23, 2016

Taxonomy & licenses

174400000X Specialist Other Service Providers Primary

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

How do I verify Gregg Knel's NPI record?

Cross-check NPI 1023469814 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1023469814 active?

Yes, as of the latest NPPES snapshot, NPI 1023469814 is active (record last updated 2016-06-23).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-23.