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

Dr. Kathryn Breen Leonard, MD

Individual provider Pediatrics Physician · NPI 1508179383

Dr. Kathryn Breen Leonard, MD is an Emergency Medicine in Saint Louis, Missouri. Graduated from Saint Louis University School of Medicine in 2008, 18 years ago. Practices with Washington University, a 2,986-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
18
Trained at
Saint Louis University School of Medicine
Licensed in
MO
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

1 Childrens Pl Div Ped Emergency Med
Saint Louis, MO 63110-1002
Phone: (314) 454-2341
Fax: (314) 454-4345
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Emergency Medicine (Pediatrics) Physician (primary) Taxonomy 2080P0204X · Licence 2013022032 (MO)
Pediatrics Physician Taxonomy 208000000X · Licence 2013022032 (MO)

Record details

NPI number1508179383
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 21, 2010
Last updated in NPPESApril 17, 2025
Certification dateFebruary 14, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Also practisesPEDIATRIC MEDICINE
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2008 (18 years in practice)
Group practice Washington University — 2986 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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