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

Individual provider Internal Medicine Physician · NPI 1407165079

Dr. Ronald Castillo Tejada Jr., MD is an Internal Medicine Physician in Lakewood, California. Practices as a sole proprietor. Licensed in California and Illinois.

Licensed in
CA, IL
In the registry since
2010
Specialties on file
2
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

3300 E South St Ste 205
Lakewood, CA 90805-4549
Phone: (562) 531-0377
Fax: (562) 531-1724
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Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A118334 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036130801 (IL)

Record details

NPI number1407165079
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 30, 2010
Last updated in NPPESOctober 1, 2012

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