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

Roger L. Ong, MD

Individual provider Internal Medicine Physician · NPI 1881761799

Roger L. Ong, MD is an Internal Medicine in Harbor City, California. Graduated from University of California, Geffen School of Medicine in 1993, 33 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
33
Trained at
University of California, Geffen 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

25825 Vermont Ave
Harbor City, CA 90710-3518
Phone: (310) 325-5111
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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 G80076 (CA)

Record details

NPI number1881761799
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 29, 2006
Last updated in NPPESNovember 30, 2021
Mailing address25825 Vermont Ave, Harbor City, CA 90710-3518

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 1993 (33 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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