Quick answers
- Which hospitals does Jonathan Nasseri work at?
- Medicare's official clinician data lists Jonathan Nasseri at 3 hospitals: Adventist Health Simi Valley, Los Robles Hospital & Medical Center and UCLA West Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jonathan Nasseri see patients?
- Medicare's clinician data lists 1 practice location in Simi Valley, CA. Call before your visit to confirm the address.
- What is Jonathan Nasseri's specialty?
- Medicare lists Hospice/Palliative Care as the primary specialty, and also Internal Medicine.
- Does Jonathan Nasseri accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan Nasseri 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 Jonathan Nasseri offer telehealth?
- Medicare's clinician data says Jonathan Nasseri offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Jonathan Nasseri?
- (805) 522-2500, as listed in official Medicare / NPI Registry data.
- What is Jonathan Nasseri's NPI number?
- 1184669160. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jonathan Nasseri works
Medicare's Facility Affiliation Data lists Jonathan Nasseri 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
- UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · CCN 050481
Practice locations
Addresses where Jonathan Nasseri is enrolled with Medicare (CMS data updated 2026-10-02).
- 2975 Sycamore DrSimi Valley, CA 93065 (805) 522‑2500
Specialties
- Hospice/Palliative Careprimary
- Internal Medicinealso
Other palliative care doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1184669160 |
| 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