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

Dr. Gemma Tok Hyon Ko, MD

Individual provider Internal Medicine Physician · NPI 1437167715

Dr. Gemma Tok Hyon Ko, MD is an Internal Medicine in Pico Rivera, California. Graduated from University of Hawaii John A. Burns School of Medicine in 1990, 36 years ago. Practices with Gemma Th Ko, MD Inc, a 2-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
36
Trained at
University of Hawaii John A. Burns 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

4511 Rosemead Blvd
Pico Rivera, CA 90660-2032
Phone: (562) 692-3388
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G70866 (CA)

Record details

NPI number1437167715
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 3, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF HAWAII JOHN A. BURNS SCHOOL OF MEDICINE
Graduated 1990 (36 years in practice)
Group practice Gemma Th Ko,Md. Inc. — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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