Justin Kosirog, M.D.



745 Fletcher Dr Ste 202

Elgin, IL 60123

Closed. Opens Thur at 8:15AM

Quick Facts

  • Colon Cancer Screenings
  • IBD, Crohn’s Disease, Ulcerative Colitis
  • Acid Reflux/Heartburn
  • Expert Endoscopy and Colonoscopy
  • Currently Accepting New Patients
  • Most Insurance Plans Accepted

Elgin, IL

Gastroenterology in Elgin, IL

Elgin, IL

745 Fletcher Dr

Ste 202

Elgin, IL 60123

Closed. Opens Thur at 8:15AM

Request Appointment

If you are experiencing a medical emergency, please call 9-1-1. This form is intended for non-urgent appointment requests only. Non-emergency requests will be responded to within 24-48 hours.

About Justin Kosirog, M.D.

Why Gastroenterology?

I have a family member with celiac disease which for first piqued my interest in the field of gastroenterology. From there, I grew to love all the different disease processes including IBD, liver pathology, and celiac disease to name a few. I also love performing endoscopy. I am also board certified in Emergency Medicine and have an interest in emergent procedures for GI bleeding, food bolus, sigmoid volvulus, etc.

What Can Patients Expect?

Patients can expect a physician who cares for the individual and who treats all individuals with respect and kindness and is thorough and diligent.


  • Undergraduate Degree: Bachelor of Science in Biology from Baylor University
  • Medical Degree: Medical Doctorate from the University of Illinois Chicago
  • Medical Residency: Internal Medicine/Emergency Medicine Residency at University of Illinois in Chicago (Chief Resident in 2019-2020)
  • Medical Fellowship: The University of Oklahoma Health Sciences Center (Chief Fellow in 2022-2023)

Awards & Recognitions

  • Outstanding Senior award-Baylor's Department of Biology
  • Graduated Magna Cum Laude from Baylor University
  • Graduated with Honors from University of Illinois Chicago College of Medicine
  • 2019 Recipient of the CARE award at UI health
  • Resident of the month (11/2018)

Professional Affiliations

  • American College of Gastroenterology
  • American Society for Gastrointestinal Endoscopy


The nurse that got me prepped was great. Dr. Kosirog came in and introduced himself to me, he was very pleasant and professional. The nurse anesthesiologist had me out in a flash. All in all everything was handled very professionally and efficiently.

M.G. Google

Very professional. Very clean environment. Surgeon and anesthesia nurse came and spoke with me putting me at ease.

N.B. Google

Great reception, from the first contact by phone, to in office personnel with document registration and yes, my visit with Dr. Kosirog, has me at ease with future visits .

J.J. Google

Everyone from receptionist to divtir extremely caring and professional.

J.D. Google

Dr Kosirog and the whole staff were top notch. Dr Kosirog was friendly, kind, explained everything perfectly. Highly reccomend.

S.D. Google


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