Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Guy Delorefice, MD

Individual provider Internal Medicine Physician · NPI 1952426421

Guy Delorefice, MD practises Internal Medicine in Sonoma, California. Graduated from Creighton University School of Medicine in 1996, 30 years ago. Accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
30
Trained at
Creighton University School of Medicine
Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

370 Perkins St
Sonoma, CA 95476-6827
Phone: (707) 938-1255
Fax: (707) 938-2321
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A0689180 (CA)

Record details

NPI number1952426421
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 20, 2007
Last updated in NPPESJune 18, 2026
Certification dateJune 18, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolCREIGHTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1996 (30 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times
Removal of tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients199
Services billed 1,798 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Providence Queen Of The Valley Medical Center Hospital · Napa, CA · listed as St Joseph Health Northern California, LLC
  • Providence Santa Rosa Memorial Hospital Hospital · Santa Rosa, CA
  • Sonoma Valley Hospital Hospital · Sonoma, CA

Other providers in Sonoma