Peter S Desilva, MD
Family Medicine · Rancho Santa Margarita, CA
At a glance
29809 Santa Margarita Pkwy, Rancho Santa Margarita, CA 92688-3613
Published activity: Melanoma (skin cancer) excision · Removal of skin lesions. View counts and coverage
NPPES record updated Nov 27, 2007. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
29809 Santa Margarita Pkwy Suite#300Rancho Santa Margarita, CA 92688-3613
Education & affiliations
- Medical / professional school
- University Of Texas Medical School At Houston
- Graduation year
- 1985
- CMS specialties
- Family Practice
Practice groups
Reported hospital affiliations
- Memorialcare Saddleback Medical Center Laguna Hills, CA
- Providence Mission Hospital Mission Viejo, CA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Melanoma (skin cancer) excision | 15 |
| Removal of skin lesions | 58 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $1,052.39 |
Reporting companies
| Company | Amount |
|---|---|
| ASTRAZENECA PHARMACEUTICALS LP | $412.05 |
| ABBVIE INC. | $125.13 |
| EXACT SCIENCES CORPORATION | $89.30 |
| PFIZER INC. | $76.92 |
| GLAXOSMITHKLINE, LLC. | $63.49 |
| SALIX PHARMACEUTICALS, A DIVISION OF BAUSCH HEALTH US, LLC | $62.77 |
| AMGEN INC. | $42.66 |
| MERCK SHARP & DOHME LLC | $41.88 |
| Other reporting companies | $138.19 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Family Medicine
- Taxonomy code
- 207Q00000X
- Enumeration date
- Sep 20, 2006
- Record updated
- Nov 27, 2007
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
207Q00000X · Primary
License reported: A44436 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
29809 Santa Margarita PkwySuite#300
Rancho Santa Margarita, CA 92688-3613
- Phone
- (949) 709-5100
- Fax
- (949) 709-5151
Mailing address
29809 SANTA MARGARITA PKWYSUITE#300
RANCHO SANTA MARGARITA, CA 926883613
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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