Quick answers
- Which hospitals does Ara Thomassian work at?
- Medicare's official clinician data lists Ara Thomassian at 2 hospitals: Cedars-Sinai Medical Center and Providence Saint Joseph Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ara Thomassian see patients?
- Medicare's clinician data lists 3 practice locations, including Tarzana, CA, Los Angeles, CA and Beverly Hills, CA. Call before your visit to confirm the address.
- What is Ara Thomassian's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Ara Thomassian accept Medicare assignment?
- Yes. Medicare's clinician data says Ara Thomassian 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 Ara Thomassian offer telehealth?
- Medicare's clinician data says Ara Thomassian offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ara Thomassian?
- (818) 774-3839, as listed in official Medicare / NPI Registry data.
- What is Ara Thomassian's NPI number?
- 1609118777. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ara Thomassian works
Medicare's Facility Affiliation Data lists Ara Thomassian at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050625
- Providence Saint Joseph Medical CenterBurbank, CA · Acute Care Hospital · CCN 050235
Practice locations
Addresses where Ara Thomassian is enrolled with Medicare (CMS data updated 2026-10-02).
- 5525 Etiwanda Ave, Suite 320Tarzana, CA 91356 (818) 774‑3839
- 8635 W 3rd St, Suite 465wLos Angeles, CA 90048 (310) 423‑0674
- 8767 Wilshire BlvdBeverly Hills, CA 90211
Group practices
Medicare enrollment lists Ara Thomassian 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 |
|---|---|
| Medical school | Meharry Medical College School Of Dentistry |
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1609118777 |
| 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