Quick answers
- Which hospitals does Marlon C. Decastro work at?
- Medicare's official clinician data lists Marlon C. Decastro at 1 hospital: Providence Santa Rosa Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marlon C. Decastro see patients?
- Medicare's clinician data lists 1 practice location in Anaheim, CA. Call before your visit to confirm the address.
- What is Marlon C. Decastro's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Marlon C. Decastro accept Medicare assignment?
- Medicare's clinician data says Marlon C. Decastro may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Marlon C. Decastro's NPI number?
- 1780643270. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marlon C. Decastro works
Medicare's Facility Affiliation Data lists Marlon C. Decastro at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Providence Santa Rosa Memorial HospitalSanta Rosa, CA · Acute Care Hospital · CCN 050174
Practice locations
Addresses where Marlon C. Decastro is enrolled with Medicare (CMS data updated 2026-10-02).
- 200 W Ctr St PromenadeAnaheim, CA 92805
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Anaheim
Clinicians with the same Medicare primary specialty in Anaheim, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1780643270 |
| 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