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

Individual provider Internal Medicine Physician · NPI 1790066090

Dr. Alexander Geng, MD practises Radiation Oncology in San Francisco, California. Graduated from University of California, San Diego School of Medicine in 2010, 16 years ago. Practices as a sole proprietor, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
16
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2011
Specialties on file
3
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

900 Hyde St Level B Dept OF Radiation Oncology
San Francisco, CA 94109
Phone: (415) 353-6420
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2333 Buchanan St, San Francisco, CA 94115-1925 — (415) 600-3616

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence A117696 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A117696 (CA)
Therapeutic Radiology Physician Taxonomy 2085R0203X · Licence A117696 (CA)

Record details

NPI number1790066090
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 31, 2011
Last updated in NPPESMarch 17, 2018

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients68
Services billed 1,168 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

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