Quick answers
- Which hospitals does John N. Mafi work at?
- Medicare's official clinician data lists John N. Mafi at 2 hospitals: Ronald Reagan UCLA Medical Center and Santa Monica - UCLA Med Ctr & Orthopaedic Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John N. Mafi see patients?
- Medicare's clinician data lists 2 practice locations, including Los Angeles, CA and Santa Monica, CA. Call before your visit to confirm the address.
- What is John N. Mafi's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also General Practice.
- Does John N. Mafi accept Medicare assignment?
- Yes. Medicare's clinician data says John N. Mafi 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.
- Does John N. Mafi offer telehealth?
- Medicare's clinician data says John N. Mafi offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John N. Mafi?
- (310) 206-1467, as listed in official Medicare / NPI Registry data.
- What is John N. Mafi's NPI number?
- 1063649465. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John N. Mafi works
Medicare's Facility Affiliation Data lists John N. Mafi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050262
- Santa Monica - UCLA Med Ctr & Orthopaedic HospitalSanta Monica, CA · Acute Care Hospital · CCN 050112
Practice locations
Addresses where John N. Mafi is enrolled with Medicare (CMS data updated 2026-10-02).
- 200 UCLA Medical Plz, Suite 365Los Angeles, CA 90095 (310) 206‑1467
- 2509 Pico BlvdSanta Monica, CA 90405 (310) 664‑7901
Group practices
Medicare enrollment lists John N. Mafi as a member of these groups (CMS data updated 2026-10-02).
- The Regents of the University of California1,462 clinicians in the group
- Venice Family Clinic102 clinicians in the group
Specialties
- Internal Medicineprimary
- General Practicealso
Other internal medicine doctors in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1063649465 |
| 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