Quick answers
- Which hospitals does Marcus D. Mazur work at?
- Medicare's official clinician data lists Marcus D. Mazur at 3 hospitals: Providence Little Co of Mary Medical Center San Pedro, Providence Little Company of Mary Medical Center Torrance and Saint John's Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marcus D. Mazur see patients?
- Medicare's clinician data lists 2 practice locations, including Santa Monica, CA and Torrance, CA. Call before your visit to confirm the address.
- What is Marcus D. Mazur's specialty?
- Medicare lists Neurosurgery as the primary specialty.
- Does Marcus D. Mazur accept Medicare assignment?
- Yes. Medicare's clinician data says Marcus D. Mazur 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 Marcus D. Mazur?
- (310) 582-7450, as listed in official Medicare / NPI Registry data.
- What is Marcus D. Mazur's NPI number?
- 1104141647. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marcus D. Mazur works
Medicare's Facility Affiliation Data lists Marcus D. Mazur at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Providence Little Co of Mary Medical Center San PedroSan Pedro, CA · Acute Care Hospital · CCN 050078
- Providence Little Company of Mary Medical Center TorranceTorrance, CA · Acute Care Hospital · CCN 050353
- Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · CCN 050290
Practice locations
Addresses where Marcus D. Mazur is enrolled with Medicare (CMS data updated 2026-10-02).
- 2125 Arizona AveSanta Monica, CA 90404 (310) 582‑7450
- 5215 Torrance Blvd, Suite 300Torrance, CA 90503 (424) 212‑5361
Group practices
Medicare enrollment lists Marcus D. Mazur as a member of this group (CMS data updated 2026-10-02).
- Providence Saint Johns Medical Foundation281 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in Santa Monica
Clinicians with the same Medicare primary specialty in Santa Monica, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104141647 |
| 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