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

Karl Leo Ost, MD

Individual provider Emergency Medicine Physician · NPI 1942233358

Karl Leo Ost, MD is an Emergency Medicine in Indianapolis, Indiana. Graduated from Indiana University School of Medicine in 2004, 22 years ago. Practices with Community Physicians of Indiana Inc, a 1,577-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
22
Trained at
Indiana University School of Medicine
Licensed in
IN
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

10122 E 10th St Ste 100
Indianapolis, IN 46229-2697
Phone: (317) 355-5717
Fax: (317) 355-3760
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 01063661 (IN)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 01063661 (IN)

Record details

NPI number1942233358
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 9, 2006
Last updated in NPPESJune 9, 2021
Certification dateJune 9, 2021

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Community Physicians Of Indiana Inc — 1577 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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