Quick answers
- Which hospitals does Peter S. Desilva work at?
- Medicare's official clinician data lists Peter S. Desilva at 2 hospitals: Memorialcare Saddleback Medical Center and Providence Mission Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Peter S. Desilva see patients?
- Medicare's clinician data lists 1 practice location in Rancho Santa Margarita, CA. Call before your visit to confirm the address.
- What is Peter S. Desilva's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Peter S. Desilva accept Medicare assignment?
- Yes. Medicare's clinician data says Peter S. Desilva 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 Peter S. Desilva?
- (949) 709-5100, as listed in official Medicare / NPI Registry data.
- What is Peter S. Desilva's NPI number?
- 1316045636. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Peter S. Desilva works
Medicare's Facility Affiliation Data lists Peter S. Desilva at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Memorialcare Saddleback Medical CenterLaguna Hills, CA · Acute Care Hospital · CCN 050603
- Providence Mission HospitalMission Viejo, CA · Acute Care Hospital · CCN 050567
Practice locations
Addresses where Peter S. Desilva is enrolled with Medicare (CMS data updated 2026-10-02).
- 29809 Santa Margarita Pkwy, Suite 300Rancho Santa Margarita, CA 92688 (949) 709‑5100
Group practices
Medicare enrollment lists Peter S. Desilva as a member of this group (CMS data updated 2026-10-02).
- Excel Physicians Medical Corporation2 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Rancho Santa Margarita
Clinicians with the same Medicare primary specialty in Rancho Santa Margarita, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At Houston |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316045636 |
| 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