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    Illinois Gastroenterology Group

    1.0 (2 reviews)
    Closed • 8:00 am - 5:00 pm

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    Alexander S Tosiou, MD

    Alexander S Tosiou, MD

    3.7(3 reviews)
    7.4 mi

    I wanted to write a review for Dr. Tosiou because I know how daunting it can be to search for a…read moregood Gastroenterologist when a scary crisis hits. Dr. Tosiou was my first gastro guy, as I like to call him, and was stellar in all regards. I then had a subsequent colonoscopy (third, actually) with a different gastro at a larger, more renowned facility. Well, suffice it to say that it was not a good experience, also in all regards. I told Dr. T that I would never cheat on him again and he then explained why the experience was not a good one and that each body type has to be taken into consideration when doing any procedures. Wow. Who knew? Obviously the other facility did not. The good news is he was so kind and utterly unperturbed that I had wandered into other pastures, so I am back in the fold of his practice. Seriously, I would say, if you need a gastro guy, he is as good as they get. If there is any downside to the practice it's that he may be difficult to speak to directly if you have questions regarding your health status. Most times it is relayed through nurses and that can be problematic. But he is worth dealing with that I believe. He also is part of Associates In Gastroenterology in Grayslake, IL. Good luck!

    I have had another gastroenterologist who I only saw once in 20 yrs! He did not even attempt to…read moreestablish a rapport with me, so when I needed further follow up, I went searching and found Dr Tosiou. He is the best! He listens closely and pays attention to your concerns; he provides answers to those concerns in a detailed but not overwhelming way. He thoroughly explained the procedures with possible side effects; his office staff was excellent in preparing you for the next steps. The hospital staff were also terrific and guided me through the next steps and had me out of there in an amazingly short period of time. All in all a great doc and staff! They deserve five stars.

    Julia A Dyer, MD

    Julia A Dyer, MD

    4.1(29 reviews)
    30.6 mi•Uptown

    I was a patient for nearly two years and consistently experienced poor communication from this…read moreoffice. Getting test results often required repeated follow-ups, and appointment wait times were frequently excessive. My most recent visit was unacceptable. I came in for a follow-up after a serious hospital stay and was turned away because the office claimed they hadn't received a fax, despite it being sent the prior week. No real effort was made to locate it, and I was even refused when I offered to email the records myself. Dr. Dyer never spoke to me directly and instead made dismissive, disrespectful comments to staff within earshot. Given the length of time I was a patient and the circumstances, this was deeply unprofessional. I will not be returning and do not recommend this practice.

    I went to Dr. Dyer for about 2-3 years. When you first start going to her, she seems competent and…read moregives you hope. Then it all goes down hill from there.She did absolutely nothing for me with the exception of prescribing me several different medications. She gave me an endoscopy told me that there was a flap inside of my stomach that is supposed to keep the acid out, but mine is not working properly. She never gave me a resolution. I've been calling her office for months, leaving messages. No return phone calls whatsoever. Then she refused to fill my medication again, even though in her own very words, this was the only medication that was left on the market, with the exception of Famotidine. She only works two days out the week Monday and Wednesday and I called leaving several message, begging and pleading for someone to call me back. Never received a return phone call for months. A horrific horrible experience. She did absolutely nothing to help me. If I could give her zero stars, I would. She should be ashamed.

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    Julia A Dyer, MD
    Julia A Dyer, MD
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    Illinois Gastroenterology Group - gastroenterologist - Updated September 2026

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