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

Oana L. Klein, MD

Individual provider Internal Medicine Physician · NPI 1427240647

Oana L. Klein, MD is an Internal Medicine Physician in Larkspur, California. Practices as a sole proprietor. Licensed in California and Illinois.

Licensed in
CA, IL
In the registry since
2007
Specialties on file
3
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

5 Bon Air Rd Ste 117
Larkspur, CA 94939-1138
Phone: (415) 448-1500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence C54895 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036-119158 (IL)
Endocrinology, Diabetes & Metabolism Physician Taxonomy 207RE0101X · Licence C54895 (CA)

Record details

NPI number1427240647
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 11, 2007
Last updated in NPPESMarch 15, 2023
Certification dateMarch 15, 2023
Mailing address5 Bon Air Rd Ste 117, Larkspur, CA 94939-1138

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