Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Guillermo Castillo, MD

Individual provider Family Medicine Physician · NPI 1366558322

Dr. Guillermo Castillo, MD is a Family Practice in San Diego, California. Graduated from University of Southern California Keck School of Medicine in 2001, 25 years ago. Offers telehealth. Licensed in California.

Years since qualifying
25
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2006
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

2001 4th Ave
San Diego, CA 92101-2303
Phone: (858) 499-2717
Fax: (858) 636-2210
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A83282 (CA)

Record details

NPI number1366558322
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 22, 2006
Last updated in NPPESMay 5, 2017

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Accepts Medicare assignment Not indicated
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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