Quick answers
- Which hospitals does Grant M. Schumaker work at?
- Medicare's official clinician data lists Grant M. Schumaker at 2 hospitals: Corona Regional Medical Center and PIH Health Good Samaritan Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Grant M. Schumaker see patients?
- Medicare's clinician data lists 4 practice locations, including Fullerton, CA, El Segundo, CA and City Of Industry, CA. Call before your visit to confirm the address.
- What is Grant M. Schumaker's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Grant M. Schumaker accept Medicare assignment?
- Medicare's clinician data says Grant M. Schumaker may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Grant M. Schumaker's NPI number?
- 1093418063. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Grant M. Schumaker works
Medicare's Facility Affiliation Data lists Grant M. Schumaker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Corona Regional Medical CenterCorona, CA · Acute Care Hospital · CCN 050329
- PIH Health Good Samaritan HospitalLos Angeles, CA · Acute Care Hospital · CCN 050471
Practice locations
Addresses where Grant M. Schumaker is enrolled with Medicare (CMS data updated 2026-10-02).
- 2221 Domingo RdFullerton, CA 92835
- 898 N Pacific Coast Hwy, Suite 600El Segundo, CA 90245
- 898 N Pacific Coast Hwy 600El Segundo, CA 90245
- PO BoxCity Of Industry, CA 91716
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Fullerton
Clinicians with the same Medicare primary specialty in Fullerton, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1093418063 |
| 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