Quick answers
- Which hospitals does Marvin Ambriz work at?
- Medicare's official clinician data lists Marvin Ambriz at 1 hospital: Lac/Harbor-Ucla Med Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marvin Ambriz see patients?
- Medicare's clinician data lists 1 practice location in Los Angeles, CA. Call before your visit to confirm the address.
- What is Marvin Ambriz's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Marvin Ambriz accept Medicare assignment?
- Yes. Medicare's clinician data says Marvin Ambriz 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 Marvin Ambriz?
- (323) 897-6000, as listed in official Medicare / NPI Registry data.
- What is Marvin Ambriz's NPI number?
- 1124648845. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marvin Ambriz works
Medicare's Facility Affiliation Data lists Marvin Ambriz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lac/Harbor-Ucla Med CenterTorrance, CA · Acute Care Hospital · CCN 050376
Practice locations
Addresses where Marvin Ambriz is enrolled with Medicare (CMS data updated 2026-10-02).
- 5850 S Main StLos Angeles, CA 90003 (323) 897‑6000
Group practices
Medicare enrollment lists Marvin Ambriz as a member of this group (CMS data updated 2026-10-02).
- County of Los Angeles397 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124648845 |
| 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