Quick answers
- Which hospitals does Mark K. Fujii work at?
- Medicare's official clinician data lists Mark K. Fujii at 1 hospital: Stanford Health Care Tri-Valley. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark K. Fujii see patients?
- Medicare's clinician data lists 1 practice location in Pleasanton, CA. Call before your visit to confirm the address.
- What is Mark K. Fujii's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Mark K. Fujii accept Medicare assignment?
- Yes. Medicare's clinician data says Mark K. Fujii 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.
- What is the phone number for Mark K. Fujii?
- (678) 690-7808, as listed in official Medicare / NPI Registry data.
- What is Mark K. Fujii's NPI number?
- 1831134873. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark K. Fujii works
Medicare's Facility Affiliation Data lists Mark K. Fujii at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · CCN 050283
Practice locations
Addresses where Mark K. Fujii is enrolled with Medicare (CMS data updated 2026-10-02).
- 5555 W Las Positas BlvdPleasanton, CA 94588 (678) 690‑7808
Group practices
Medicare enrollment lists Mark K. Fujii as a member of this group (CMS data updated 2026-10-02).
- Premier Anesthesia of California PC46 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Pleasanton
Clinicians with the same Medicare primary specialty in Pleasanton, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Hahnemann University College Of Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831134873 |
| 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