Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Thomas A Gionis, MD

Individual provider Emergency Medicine Physician · NPI 1780638049

Thomas A Gionis, MD is a Family Practice in Norwalk, California. Graduated from Medical University of South Carolina College of Medicine in 1975, 51 years ago. Practices with American Specialty Physicians Group Inc, a 92-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
51
Trained at
Medical University of South Carolina College of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

13100 Studebaker Rd
Norwalk, CA 90650-2531
Phone: (562) 864-6377
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence C39248 (CA)

Record details

NPI number1780638049
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 20, 2006
Last updated in NPPESNovember 27, 2007
Mailing addressDept La 21575, Pasadena, CA 91185-1575

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolMEDICAL UNIVERSITY OF SOUTH CAROLINA COLLEGE OF MEDICINE
Graduated 1975 (51 years in practice)
Group practice American Specialty Physicians Group Inc — 92 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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