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

Individual provider Specialist · NPI 1689602146

John Leo Showel, MD is a Hematology/Oncology in Chicago, Illinois. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 1965, 61 years ago. Practices with Rush University Medical Group, a 1,499-clinician group and accepts Medicare assignment.

Years since qualifying
61
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
In the registry since
2006
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

1725 W Harrison St Ste 855
Chicago, IL 60612-3841
Phone: (312) 942-5904
Fax: (312) 563-4144
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X

Record details

NPI number1689602146
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 30, 2006
Last updated in NPPESJuly 8, 2007
Mailing address1725 W Harrison St, Suite 855, Chicago, IL 60612-3841

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 1965 (61 years in practice)
Group practice Rush University Medical Group — 1499 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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