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

Gregory Castillo, MD

Individual provider Family Medicine Physician · NPI 1700839917

Gregory Castillo, MD is a Family Medicine Physician in Downey, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

9040 Telegraph Rd Ste 102
Downey, CA 90240-2395
Phone: (562) 861-0954
Fax: (562) 231-1906
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A53294 (CA)

Record details

NPI number1700839917
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 18, 2006
Last updated in NPPESMarch 7, 2023
Certification dateOctober 13, 2020
Mailing addressPo Box 275, Artesia, CA 90702-0275

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