Quick answers
- Which hospitals does Johnny Cai work at?
- Medicare's official clinician data lists Johnny Cai at 3 hospitals: Eden Medical Center, Stanford Health Care Tri-Valley and Washington Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Johnny Cai see patients?
- Medicare's clinician data lists 3 practice locations, including Fremont, CA, Pleasanton, CA and Palo Alto, CA. Call before your visit to confirm the address.
- What is Johnny Cai's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Johnny Cai accept Medicare assignment?
- Yes. Medicare's clinician data says Johnny Cai 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 Johnny Cai offer telehealth?
- Medicare's clinician data says Johnny Cai offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Johnny Cai?
- (510) 490-1222, as listed in official Medicare / NPI Registry data.
- What is Johnny Cai's NPI number?
- 1861998452. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Johnny Cai works
Medicare's Facility Affiliation Data lists Johnny Cai at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Eden Medical CenterCastro Valley, CA · Acute Care Hospital · CCN 050488
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · CCN 050283
- Washington HospitalFremont, CA · Acute Care Hospital · CCN 050195
Practice locations
Addresses where Johnny Cai is enrolled with Medicare (CMS data updated 2026-10-02).
- 3200 Kearney StFremont, CA 94538 (510) 490‑1222
- 5555 W Las Positas BlvdPleasanton, CA 94588 (925) 373‑4068
- 795 El Camino RealPalo Alto, CA 94301 (415) 600‑1020
Group practices
Medicare enrollment lists Johnny Cai as a member of this group (CMS data updated 2026-10-02).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Touro Un College Of Osteopathic Medicine, Vallejo |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1861998452 |
| 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