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

Leon Jay Frazin, MD

Individual provider Cardiovascular Disease Physician · NPI 1174555916

Leon Jay Frazin, MD is a Cardiovascular Disease (Cardiology) in Chicago, Illinois. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 1962, 64 years ago. Practices with The Board of Trustees of the University of Illinois, a 1,142-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
64
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
IL
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

2233 W Division St
Chicago, IL 60622-3043
Phone: (312) 770-2438
Fax: (312) 770-2030
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X (IL)

Record details

NPI number1174555916
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 6, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 1962 (64 years in practice)
Group practice The Board Of Trustees Of The University Of Illinois — 1142 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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