Quick answers
- Which hospitals does Aric L. Gregson work at?
- Medicare's official clinician data lists Aric L. Gregson at 5 hospitals: Cedar-Sinai Marina del Rey Hospital, Cedars-Sinai Medical Center, Providence Cedars Sinai Tarzana Medical Center, Providence Holy Cross Medical Center and Saint John's Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Aric L. Gregson see patients?
- Medicare's clinician data lists 4 practice locations, including Mission Hills, CA, Tarzana, CA and Santa Monica, CA. Call before your visit to confirm the address.
- What is Aric L. Gregson's specialty?
- Medicare lists Infectious Disease as the primary specialty, and also Internal Medicine.
- Does Aric L. Gregson accept Medicare assignment?
- Yes. Medicare's clinician data says Aric L. Gregson 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 Aric L. Gregson?
- (818) 496-4411, as listed in official Medicare / NPI Registry data.
- What is Aric L. Gregson's NPI number?
- 1588683007. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Aric L. Gregson works
Medicare's Facility Affiliation Data lists Aric L. Gregson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cedar-Sinai Marina del Rey HospitalMarina del Rey, CA · Acute Care Hospital · CCN 050740
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050625
- Providence Cedars Sinai Tarzana Medical CenterTarzana, CA · Acute Care Hospital · CCN 050761
- Providence Holy Cross Medical CenterMission Hills, CA · Acute Care Hospital · CCN 050278
- Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · CCN 050290
Practice locations
Addresses where Aric L. Gregson is enrolled with Medicare (CMS data updated 2026-10-02).
- 15031 Rinaldi StMission Hills, CA 91345 (818) 496‑4411
- 18321 Clark StTarzana, CA 91356 (818) 708‑5082
- 2121 Santa Monica BlvdSanta Monica, CA 90404 (310) 829‑5511
- 8700 Beverly BlvdWest Hollywood, CA 90048 (310) 423‑5154
Specialties
- Infectious Diseaseprimary
- Internal Medicinealso
Other infectious disease doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588683007 |
| 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