Quick answers
- Which hospitals does Mark Asef work at?
- Medicare's official clinician data lists Mark Asef at 2 hospitals: Loma Linda University Medical Center and Riverside University Health System-Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Asef see patients?
- Medicare's clinician data lists 2 practice locations, including Banning, CA and San Bernardino, CA. Call before your visit to confirm the address.
- What is Mark Asef's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Mark Asef accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Asef 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 Mark Asef?
- (951) 769-9776, as listed in official Medicare / NPI Registry data.
- What is Mark Asef's NPI number?
- 1225561673. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark Asef works
Medicare's Facility Affiliation Data lists Mark Asef at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Loma Linda University Medical CenterLoma Linda, CA · Acute Care Hospital · CCN 050327
- Riverside University Health System-Medical CenterMoreno Valley, CA · Acute Care Hospital · CCN 050292
Practice locations
Addresses where Mark Asef is enrolled with Medicare (CMS data updated 2026-10-02).
- 264 N Highland Springs Ave, Suite 3bBanning, CA 92220 (951) 769‑9776
- 401 E Highland Ave, Suite 551San Bernardino, CA 92404 (909) 882‑9150
Group practices
Medicare enrollment lists Mark Asef as a member of this group (CMS data updated 2026-10-02).
- Nephrology Associates Medical Group Inc64 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Banning
Clinicians with the same Medicare primary specialty in Banning, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225561673 |
| 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