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

Tsung Tso Tsai, MD

Individual provider Internal Medicine Physician · NPI 1629250394

Tsung Tso Tsai, MD is an Internal Medicine in Ontario, California. Qualified in 2004, 22 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group and accepts Medicare assignment. Licensed in California and Ohio.

Years since qualifying
22
Licensed in
CA, OH
In the registry since
2007
Specialties on file
3
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

2295 S Vineyard Ave Bldg A
Ontario, CA 91761-7925
Phone: (888) 750-0036
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

General Practice Physician (primary) Taxonomy 208D00000X · Licence A114112 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A114112 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 57.013814 (OH)

Record details

NPI number1629250394
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedDecember 4, 2007
Last updated in NPPESNovember 30, 2021
Certification dateNovember 30, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGENERAL PRACTICE
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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