Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gionis Emergency Medical Group, Inc

Emergency Medicine Physician in Norwalk, CA · enumerated 2006 · authorized official Thomas Gionis, President.

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

National Provider Identifier

1710939749

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Registry record

Entity type Organization (Type 2)

Legal business name Gionis Emergency Medical Group, Inc

Practice address 13100 Studebaker Rd, Norwalk, CA, 90650

Phone (562) 864-6377

Enumeration date May 17, 2006

Last updated in NPPES Nov 19, 2008

Taxonomy & classification

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Thomas Gionis

Title President

Phone (562) 864-6377

Other identifiers

Identifier	Type	State	Issuer
GR0100600	Medicaid	CA	-
ZZZ69818Z	Other	CA	BLUE SHIELD

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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-11-19. Verify at npiregistry.cms.hhs.gov.

Where is Gionis Emergency Medical Group, Inc located?

The practice location on file with NPPES is in Norwalk, CA.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-11-19.