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

Individual provider Internal Medicine Physician · NPI 1992891493

Joseph Chungsun Chao, MD is a Cardiovascular Disease (Cardiology) in Mountain View, California. Qualified in 1976, 50 years ago. Practices as a sole proprietor, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
50
Licensed in
CA
In the registry since
2006
Specialties on file
2
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

525 S Dr Ste 105
Mountain View, CA 94040-4211
Phone: (650) 962-0242
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 300 Pasteur Dr, Stanford, CA 94305-2200 — (650) 723-4000

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence A45961 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A45961 (CA)

Record details

NPI number1992891493
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 4, 2006
Last updated in NPPESApril 15, 2024
Certification dateApril 15, 2024

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1976 (50 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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