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

Oana Olaru, MD

Individual provider Internal Medicine Physician · NPI 1669466447

Oana Olaru, MD is a Hospitalist in Naperville, Illinois. Qualified in 1997, 29 years ago. Practices with Endeavor Health Medical Group, a 3,348-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
29
Licensed in
IL
In the registry since
2005
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

801 S Washington St
Naperville, IL 60540-7430
Phone: (630) 527-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 036.110061 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036.110061 (IL)

Record details

NPI number1669466447
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 7, 2005
Last updated in NPPESMarch 31, 2021
Certification dateMarch 23, 2021
Mailing address801 S Washington St, Naperville, IL 60540-7430

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice Endeavor Health Medical Group — 3348 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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