Quick answers
- Which hospitals does Stephen M. Cerni work at?
- Medicare's official clinician data lists Stephen M. Cerni at 2 hospitals: Chino Valley Medical Center and Montclair Hospital Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephen M. Cerni see patients?
- Medicare's clinician data lists 2 practice locations, including Montclair, CA and Chino, CA. Call before your visit to confirm the address.
- What is Stephen M. Cerni's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Stephen M. Cerni accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen M. Cerni 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 Stephen M. Cerni?
- (909) 625-5411, as listed in official Medicare / NPI Registry data.
- What is Stephen M. Cerni's NPI number?
- 1720550783. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephen M. Cerni works
Medicare's Facility Affiliation Data lists Stephen M. Cerni at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Chino Valley Medical CenterChino, CA · Acute Care Hospital · CCN 050586
- Montclair Hospital Medical CenterMontclair, CA · Acute Care Hospital · CCN 050758
Practice locations
Addresses where Stephen M. Cerni is enrolled with Medicare (CMS data updated 2026-10-02).
- 5000 San Bernardino StMontclair, CA 91763 (909) 625‑5411
- 5451 Walnut AveChino, CA 91710 (909) 625‑5411
Group practices
Medicare enrollment lists Stephen M. Cerni as a member of this group (CMS data updated 2026-10-02).
- Ignite Emergency Physicians a Medical Corporation45 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Montclair
Clinicians with the same Medicare primary specialty in Montclair, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720550783 |
| 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