Quick answers
- Which hospitals does Jieshi Yan work at?
- Medicare's official clinician data lists Jieshi Yan at 3 hospitals: Adventist Health Simi Valley, Los Robles Hospital & Medical Center and Northridge Hospital Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jieshi Yan see patients?
- Medicare's clinician data lists 2 practice locations, including Thousand Oaks, CA and Simi Valley, CA. Call before your visit to confirm the address.
- What is Jieshi Yan's specialty?
- Medicare lists Nephrology as the primary specialty, and also Internal Medicine.
- Does Jieshi Yan accept Medicare assignment?
- Yes. Medicare's clinician data says Jieshi Yan 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 Jieshi Yan?
- (805) 496-1266, as listed in official Medicare / NPI Registry data.
- What is Jieshi Yan's NPI number?
- 1396744546. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jieshi Yan works
Medicare's Facility Affiliation Data lists Jieshi Yan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health Simi ValleySimi Valley, CA · Acute Care Hospital · CCN 050236
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · CCN 050549
- Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · CCN 050116
Practice locations
Addresses where Jieshi Yan is enrolled with Medicare (CMS data updated 2026-10-02).
- 227 W Janss Rd, Suite 100Thousand Oaks, CA 91360 (805) 496‑1266
- 2925 Sycamore Dr, Suite 160Simi Valley, CA 93065 (805) 584‑0177
Group practices
Medicare enrollment lists Jieshi Yan as a member of this group (CMS data updated 2026-10-02).
- California Kidney Medical Group Inc5 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Stanford University School Of Medicine |
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396744546 |
| 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