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

Individual provider Emergency Medicine Physician · NPI 1427136050

Markus T. Leong, MD is an Emergency Medicine in South San Francisco, California. Graduated from George Washington University School of Medicine in 2000, 26 years ago. Practices with San Francisco Emergency Medical Associates, a 72-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
26
Trained at
George Washington University School 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

1200 El Camino Real
South San Francisco, CA 94080-3208
Phone: (650) 742-2000
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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 A81198 (CA)

Record details

NPI number1427136050
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 1, 2006
Last updated in NPPESFebruary 14, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2000 (26 years in practice)
Group practice San Francisco Emergency Medical Associates — 72 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in South San Francisco