Quick answers
- Which hospitals does Alexander B. Geng work at?
- Medicare's official clinician data lists Alexander B. Geng at 4 hospitals: California Pacific Medical Center- Van Ness Campus, Chinese Hospital, UCSF Health Saint Francis Hospital and UCSF Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alexander B. Geng see patients?
- Medicare's clinician data lists 1 practice location in San Francisco, CA. Call before your visit to confirm the address.
- What is Alexander B. Geng's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Alexander B. Geng accept Medicare assignment?
- Yes. Medicare's clinician data says Alexander B. Geng accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Alexander B. Geng offer telehealth?
- Medicare's clinician data says Alexander B. Geng offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Alexander B. Geng?
- (415) 353-6420, as listed in official Medicare / NPI Registry data.
- What is Alexander B. Geng's NPI number?
- 1790066090. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alexander B. Geng works
Medicare's Facility Affiliation Data lists Alexander B. Geng at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · CCN 050047
- Chinese HospitalSan Francisco, CA · Acute Care Hospital · CCN 050407
- UCSF Health Saint Francis HospitalSan Francisco, CA · Acute Care Hospital · CCN 050152
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · CCN 050454
Practice locations
Addresses where Alexander B. Geng is enrolled with Medicare (CMS data updated 2026-10-02).
- 900 Hyde StSan Francisco, CA 94109 (415) 353‑6420
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Diego School Of Medicine |
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1790066090 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians