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

Dr. Mark Chung-Hsun Tsai, MD

Individual provider Internal Medicine Physician · NPI 1225033111

Dr. Mark Chung-Hsun Tsai, MD is an Internal Medicine in Paramount, California. Graduated from University of Pittsburgh School of Medicine in 2001, 25 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
25
Trained at
University of Pittsburgh School of Medicine
Licensed in
CA
In the registry since
2005
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

16415 Colorado Ave Ste 101
Paramount, CA 90723-5035
Phone: (562) 634-6341
Fax: (562) 634-8949
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A81875 (CA)

Record details

NPI number1225033111
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 16, 2005
Last updated in NPPESApril 3, 2017

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF PITTSBURGH SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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