Quick answers
- Which hospitals does Mai Sie F. Chan work at?
- Medicare's official clinician data lists Mai Sie F. Chan at 3 hospitals: California Pacific Medical Center- Van Ness Campus, Chinese Hospital and UCSF Health Saint Francis Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mai Sie F. Chan see patients?
- Medicare's clinician data lists 1 practice location in San Francisco, CA. Call before your visit to confirm the address.
- What is Mai Sie F. Chan's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mai Sie F. Chan accept Medicare assignment?
- Yes. Medicare's clinician data says Mai Sie F. Chan 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 Mai Sie F. Chan offer telehealth?
- Medicare's clinician data says Mai Sie F. Chan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mai Sie F. Chan?
- (415) 956-6633, as listed in official Medicare / NPI Registry data.
- What is Mai Sie F. Chan's NPI number?
- 1326136557. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mai Sie F. Chan works
Medicare's Facility Affiliation Data lists Mai Sie F. Chan 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
Practice locations
Addresses where Mai Sie F. Chan is enrolled with Medicare (CMS data updated 2026-10-02).
- 929 Clay St, Suite 303San Francisco, CA 94108 (415) 956‑6633
Specialties
- Internal Medicineprimary
Other internal medicine doctors in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Stanford University School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1326136557 |
| 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