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

Alexander Geng Inc

Organization Radiation Oncology Physician · NPI 1992394811

Alexander Geng Inc is a Radiation Oncology Physician in San Francisco, California. Registered with an NPI since 2021.

In the registry since
2021
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

900 Hyde St
San Francisco, CA 94109-4806
Phone: (415) 353-6420
Fax: (415) 353-6259
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X

Record details

NPI number1992394811
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Alexander Geng — Physician/Owner · (415) 353-6420
NPI enumeratedJanuary 14, 2021
Last updated in NPPESJanuary 14, 2021
Certification dateJanuary 14, 2021
Mailing address450 Glass Ln Ste C, Modesto, CA 95356-9287

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