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

Efrem L. Castillo, MD

Individual provider Family Medicine Physician · NPI 1003888785

Efrem L. Castillo, MD is a Family Medicine Physician in San Antonio, Texas. Licensed in Texas. Registered with an NPI since 2006.

Licensed in
TX
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

8637 Fredericksburg Rd Ste 360
San Antonio, TX 78240-1219
Phone: (210) 877-7669
Fax: (210) 617-4075
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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 J4029 (TX)

Record details

NPI number1003888785
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 6, 2006
Last updated in NPPESJuly 19, 2012
Mailing address8637 Fredericksburg Rd, Ste 360, San Antonio, TX 78240-1219

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