NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Stelios Katzakis, PA-C

Physician Assistant in Tracy, CA · enumerated 2009.

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

National Provider Identifier

1134362262

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Registry record

Entity type Individual (Type 1)
Name Mr. Stelios Katzakis
Credential PA-C
Sex Male
Practice address Tracy, CA, 95376
Phone (209) 832-6018
Enumeration date Apr 20, 2009
Last updated in NPPES Jun 22, 2016

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA20240 (CA) 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.

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Frequently asked questions

How do I verify Stelios Katzakis's NPI record?
Cross-check NPI 1134362262 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1134362262 active?
Yes, as of the latest NPPES snapshot, NPI 1134362262 is active (record last updated 2016-06-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-22.