Quick answers
- Which hospitals does Peter I. Margolis work at?
- Medicare's official clinician data lists Peter I. Margolis at 1 hospital: Los Robles Hospital & Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Peter I. Margolis see patients?
- Medicare's clinician data lists 1 practice location in Thousand Oaks, CA. Call before your visit to confirm the address.
- What is Peter I. Margolis's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Peter I. Margolis accept Medicare assignment?
- Yes. Medicare's clinician data says Peter I. Margolis 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 Peter I. Margolis?
- (805) 379-4545, as listed in official Medicare / NPI Registry data.
- What is Peter I. Margolis's NPI number?
- 1306876164. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Peter I. Margolis works
Medicare's Facility Affiliation Data lists Peter I. Margolis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · CCN 050549
Practice locations
Addresses where Peter I. Margolis is enrolled with Medicare (CMS data updated 2026-10-02).
- 333 S Moorpark RdThousand Oaks, CA 91361 (805) 379‑4545
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | R Franklin University Of Med & Sci/chicago Medical School |
| Graduation year | 1978 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306876164 |
| 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