Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. John Martin Leonard, MD

Individual provider Clinical Medical Laboratory · NPI 1376697169

Dr. John Martin Leonard, MD is a Clinical Medical Laboratory in Chicago, Illinois. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2007
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

840 N Lake Shore Dr # 2201
Chicago, IL 60611-2489
Phone: (312) 640-6030
Fax: (847) 937-3918
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Medical Laboratory (primary) Taxonomy 291U00000X · Licence D0034529 (MD)

Record details

NPI number1376697169
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 22, 2007
Last updated in NPPESMarch 7, 2023

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