Quick answers
- Which hospitals does Greg G. Kojayan work at?
- Medicare's official clinician data lists Greg G. Kojayan at 3 hospitals: Adventist Health Simi Valley, Cedars-Sinai Medical Center and Glendale Adventist Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Greg G. Kojayan see patients?
- Medicare's clinician data lists 5 practice locations, including Glendale, CA, Simi Valley, CA and West Hollywood, CA. Call before your visit to confirm the address.
- What is Greg G. Kojayan's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Greg G. Kojayan accept Medicare assignment?
- Yes. Medicare's clinician data says Greg G. Kojayan 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 Greg G. Kojayan?
- (818) 863-4099, as listed in official Medicare / NPI Registry data.
- What is Greg G. Kojayan's NPI number?
- 1689200594. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Greg G. Kojayan works
Medicare's Facility Affiliation Data lists Greg G. Kojayan 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
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050625
- Glendale Adventist Medical CenterGlendale, CA · Acute Care Hospital · CCN 050239
Practice locations
Addresses where Greg G. Kojayan is enrolled with Medicare (CMS data updated 2026-10-02).
- 1500 E Chevy Chase Dr, Suite 201Glendale, CA 91206 (818) 863‑4099
- 1509 Wilson TerGlendale, CA 91206 (818) 409‑8000
- 1920 E Los Angeles AveSimi Valley, CA 93065 (805) 306‑8800
- 2750 Sycamore DrSimi Valley, CA 93065 (805) 955‑8100
- 8700 Beverly BlvdWest Hollywood, CA 90048 (310) 423‑3277
Group practices
Medicare enrollment lists Greg G. Kojayan as a member of these groups (CMS data updated 2026-10-02).
- Cedars-Sinai Medical Care Foundation1,692 clinicians in the group
- Glendale Adventist Medical Center103 clinicians in the group
- Simi Valley Anesthesia Medical Group25 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Glendale
Clinicians with the same Medicare primary specialty in Glendale, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689200594 |
| 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