Quick answers
- Which hospitals does Nathan Alyesh work at?
- Medicare's official clinician data lists Nathan Alyesh at 1 hospital: Providence Cedars Sinai Tarzana Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nathan Alyesh see patients?
- Medicare's clinician data lists 2 practice locations, including Tarzana, CA and Calabasas, CA. Call before your visit to confirm the address.
- What is Nathan Alyesh's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Nathan Alyesh accept Medicare assignment?
- Yes. Medicare's clinician data says Nathan Alyesh 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 Nathan Alyesh?
- (818) 881-0800, as listed in official Medicare / NPI Registry data.
- What is Nathan Alyesh's NPI number?
- 1417362856. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nathan Alyesh works
Medicare's Facility Affiliation Data lists Nathan Alyesh at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Providence Cedars Sinai Tarzana Medical CenterTarzana, CA · Acute Care Hospital · CCN 050761
Practice locations
Addresses where Nathan Alyesh is enrolled with Medicare (CMS data updated 2026-10-02).
- 18321 Clark StTarzana, CA 91356 (818) 881‑0800
- 23622 Calabasas Rd, Suite 122Calabasas, CA 91302 (818) 881‑8252
Group practices
Medicare enrollment lists Nathan Alyesh as a member of this group (CMS data updated 2026-10-02).
- Cedars-Sinai Medical Care Foundation1,692 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Tarzana
Clinicians with the same Medicare primary specialty in Tarzana, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417362856 |
| 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