Gastroenterology Illinois

Raising the Bar in Gastrointestinal Care

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Medical Excellence and Patient-Centered Care

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Gastroenterology Treatments across Illinois

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Thousands of happy patients

Good experience. Pleasant caring professionals at every stage of the procedure.

B.R. Google

The nurses and staff are warm and friendly and caring. the nurse anesthetist is AWESOME (I never felt even a tiny ouch!). Dr. Muscarella is respectful and thorough in caring for my husband and me. I highly recommend him and his office

P.S. Google

Dr Blumenstein provided excellent service. He listened very closely to my symptoms and came up with a treatment plan.

J.L. Google

I was recommended to Dr Calandra by a friend after having a hard time making an appointment where I had my last procedure. The appointment process was easy and I was able to schedule an appointment at a time that worked for me. Everyone I dealt with was friendly and professional. From the receptionist, nurses and anesthesiologist- I felt in good care. Dr Calandra came in before and introduced himself and talked about the plan and put me at ease. After he came back in to give me results and answer any questions I had. I was on my way home within 1 hour of my appointment time. I also received an email with details of my visit. The whole process was easy and I’d definitely recommend Dr Calandra and his practice.

J.C. Google

As colonoscopies go, this experience was very good, the staff was courteous and efficient, more importantly they were fast.

M.H. Google


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Welcome to GI Alliance of Illinois. Our patient-centric focus will ensure that your care and comfort will always be our top priority. Our team of skilled GI specialists assists patients with achieving their optimal GI health through diagnosis, treatment, and management of a variety of GI conditions that range from acid reflux, bloating, and constipation to Inflammatory Bowel Disease, colon cancer, liver disease, and much more.

About Us

When it comes to colon cancer, it is always best to be proactive! The best way to prevent it and detect it early is to schedule a colonoscopy screening. A colonoscopy is also a great tool for diagnosing other bothersome symptoms such as abdominal pain, rectal bleeding, chronic diarrhea, and more. If you are 45 or over, at risk for colon cancer, or have a family history of colon cancer, a colonoscopy is a simple and easy 15 – 30 minute procedure to help you stay on top of your colon health.

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Inflammatory Bowel Disease is the chronic inflammation of the GI tract. The most common forms of IBD are Crohn's disease and ulcerative colitis, which affect approximately 1.6 million Americans, with new cases being diagnosed every year. Some risk factors include age and whether you smoke; however, you are at a heightened risk if you have a family history, as IBD can be genetic. Although IBD does not have a cure, there are treatment options available to manage this chronic condition and its symptoms.

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