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

Individual provider Internal Medicine Physician · NPI 1346354776

Lauren Jefferis, MD is an Internal Medicine Physician in San Marcos, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
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

150 Valpreda Rd
San Marcos, CA 92069-2973
Phone: (760) 736-6700
Fax: (760) 736-6782
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Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A80674 (CA)
Pediatrics Physician Taxonomy 208000000X · Licence A80674 (CA)

Record details

NPI number1346354776
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 19, 2006
Last updated in NPPESFebruary 27, 2008
Mailing address150 Valpreda Rd, San Marcos, CA 92069-2973

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