Quick answers
- Which hospitals does Mark B. Ringer work at?
- Medicare's official clinician data lists Mark B. Ringer at 3 hospitals: Adventist Health White Memorial, Loma Linda University Medical Center and Pomona Valley Hospital Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark B. Ringer see patients?
- Medicare's clinician data lists 3 practice locations, including Loma Linda, CA and Pomona, CA. Call before your visit to confirm the address.
- What is Mark B. Ringer's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Mark B. Ringer accept Medicare assignment?
- Yes. Medicare's clinician data says Mark B. Ringer 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 B. Ringer?
- (909) 865-9500, as listed in official Medicare / NPI Registry data.
- What is Mark B. Ringer's NPI number?
- 1629607171. 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 B. Ringer works
Medicare's Facility Affiliation Data lists Mark B. Ringer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health White MemorialLos Angeles, CA · Acute Care Hospital · CCN 050103
- Loma Linda University Medical CenterLoma Linda, CA · Acute Care Hospital · CCN 050327
- Pomona Valley Hospital Medical CenterPomona, CA · Acute Care Hospital · CCN 050231
Practice locations
Addresses where Mark B. Ringer is enrolled with Medicare (CMS data updated 2026-10-02).
- 11234 Anderson StLoma Linda, CA 92354
- 11370 Anderson StLoma Linda, CA 92354
- 1798 N Garey AvePomona, CA 91767 (909) 865‑9500
Group practices
Medicare enrollment lists Mark B. Ringer as a member of these groups (CMS data updated 2026-10-02).
- Faculty Physicians and Surgeons of Llusm1,315 clinicians in the group
- Cep America - California1,292 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Loma Linda
Clinicians with the same Medicare primary specialty in Loma Linda, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629607171 |
| 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