Justin Kosirog, M.D.



745 Fletcher Dr Ste 202

Elgin, IL 60123

Open today 8:15AM - 4:30PM

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

Open today 8:15AM - 4:30PM

Request an 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


this is the only doctor i’ve been to that actually listened to me and took the time to help me and wasn’t in a rush to just give me a pill and tell me to come back

J.S. Google

Dr Justin Kosirog ,was very professional by taking his time to explain everything before and after procedure . Thank you

P.W. Google

I met Dr Kosirog for the first time this past week. He explained the results of my recent tests and explained the treatment options in great depth. I had many questions regarding the options. He answered each question in great detail which I appreciated. I had a loaded travel schedule which limited the time I could have any further tests/procedures done. Dr Kosirog took the time to figure out what times were available to fit my schedule. It was a win/win. I was able to get the tests/procedures scheduled without impacting my travel schedule. If you are looking for a patient oriented Gastroenterologist I can recommend Dr Kosirog without reservation!

J.S. Google

Very clean facilitie and friendly staff. They run like a Swiss watch. Dr Kosirog is very friendly and inviting. I would recommend him to anyone seeking this type medical care.

A.W. Google

Every one there from reception to nurses and doctors did a great job, thank you!!!

D.G. Google


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