Measles Information

Alexander S. Tosiou, MD

4.9

1386 ratings Read Reviews

Northwestern Medical Group

Primary Specialty

Gastroenterology

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Education

Medical Education:: MD, Loyola University Stritch School of Medicine - 1993
Residency:: McGaw Medical Center of Northwestern University - 1996
Fellowships:: Advocate Health Care (Advocate Lutheran General Hospital) - 1999

Board Certifications

American Board of Internal Medicine - Gastroenterology (Certified)

Faculty Profile

Clinical Assistant Professor, Feinberg School of Medicine

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Practice Groups and Affiliations

Medical Group:: Northwestern Medical Group
Alignment Category:: Northwestern Medicine Physician Network
On Medical Staff At:: Catherine Gratz Griffin Lake Forest Hospital

Grayslake Ambulatory Surgery Center

Ratings and Reviews

At Northwestern Medicine, our patient’s feedback is important to us. While different care providers have their own unique strengths, we strive to be as transparent as possible with our quality of care.

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Overall Rating

4.9

4.9

1386 Ratings

Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

100 Most Recent Reviews

April 29, 2025

5.0

He truly is the best.

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April 28, 2025

5.0

Dr Tosiou is kind, professional & thorough. I never feel rushed and he really listens to every concern I present.

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April 27, 2025

5.0

I felt safe in his presence.

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April 27, 2025

5.0

He was prompt, kind and caring Very professional and thorough. He explained everything to me and I never felt rushed! A great Doctor!

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April 26, 2025

5.0

Very good doctor and provided excellent care and communication.

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April 26, 2025

5.0

I could not do my "health" life without the help from Dr. Tosiou. He has been my guide these 20 + years. Thank you, Dr. Tosiou.

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April 26, 2025

5.0

He also was nice and came to speak to me after the procedure.

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April 24, 2025

5.0

Quality care ( if you can get an appointment)

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April 23, 2025

5.0

Very polite and listens to questions. Answers so you can understand.

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April 21, 2025

5.0

Seemed extremely knowledgeable and willing to assist with problems.

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April 21, 2025

5.0

Explains his reasoning well and listens to questions. Thanks.

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April 18, 2025

5.0

Dr. Tosiou was attentive, answered questions, and was very focused on my care. This was my initial visit and I left feeling like I had an excellent care provider when I needed one!

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April 18, 2025

5.0

He is professional and knows what he's doing

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April 16, 2025

5.0

Dr Tosiou is a top notch doctor. He's very genuine with his work and he explains the process or concerns in a way that easy to understand. He cares about his patients by making sure that all the questions are answered.

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April 16, 2025

5.0

Dr, Tosiou was very professional, courteous and knowledgeable, He diagnosed an issue that I have been experiencing for quite some time and prescribed the correct medication, which has seemed to rectify the issue.

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April 12, 2025

5.0

sincere concern about my health

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April 11, 2025

5.0

Attentive, precise, and clear doctor for when he is going to perform the colonoscopy

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April 11, 2025

5.0

Thorough in his care of the patient. Explained everything in layman terms. Dr. Tosiou came across as very trusting and knowledgeable.

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April 07, 2025

5.0

Dr. Tosiou was kind, efficient, and helpful.

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April 07, 2025

5.0

Professional doctor

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April 04, 2025

5.0

Dr.Alexander S Tosiou explain to me about details of the procedure & Findings.

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April 04, 2025

5.0

put me at ease. great bedside manner.

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April 04, 2025

5.0

Because they make us feel safe

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April 03, 2025

5.0

Dr. Tosiou and his team were very caring and thorough with the whole preparation before and during the endoscopy.

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April 01, 2025

5.0

nonsense doctor he care about you

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March 31, 2025

5.0

Pleasant to work with

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March 30, 2025

5.0

Hard working doctor who does a great job

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March 28, 2025

5.0

Excellent doctor.

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March 24, 2025

5.0

He is very good at the procedure and communicated very well

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March 24, 2025

5.0

Testing done quickly and with no issues. Especially appreciated the lab result messaged as soon as available.

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March 22, 2025

5.0

Very professional and knowledgeable. He made the entire process quick and easy.

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March 21, 2025

5.0

Very straightforward, explained everything, very reassuring.

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March 21, 2025

5.0

He made me feel at ease and answered any questions I had.

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March 21, 2025

5.0

Caring and timely treatment for my colonoscopy procedure.

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March 17, 2025

5.0

Again the doctor was friendly and explained the procedure to me and answered my questions before we befan

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March 17, 2025

5.0

Dr. Tosiou is a great physician and very experienced with abundant knowledge in his field. You are always in good hands under his care.

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March 14, 2025

5.0

My procedure was done well with no after affects. Dr Tosiou was professional.

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March 12, 2025

5.0

Dr A. Tosiou listens well, he is very patient, attentive to my problem and needs. Explains everything clearly and answers every question I have.

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March 10, 2025

5.0

Dr. Tosiou is AMAZING!!! Explained the process thoroughly and was great with my family during the entire process.

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March 10, 2025

5.0

They was very nice to me and they have patience thanks

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March 08, 2025

5.0

After the procedure Dr. Tosiou came in and told me how the procedure went.thank you

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March 07, 2025

5.0

Thorough, kind, helpful . . . and great staff!

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March 06, 2025

5.0

Experience Doctor

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March 03, 2025

5.0

He listened, courteous

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February 27, 2025

5.0

Very good doctor. Takes his time and explains everything and listens to my concerns

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February 26, 2025

5.0

I had a great experience. Dr Tosiou was thorough, caring, and had. Checked my history before seeing me.

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February 26, 2025

5.0

Dr. Tosiou is an excellent and knowledgeable physician who cares.

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February 25, 2025

5.0

He is very confident, experienced, professional and personal.

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February 21, 2025

5.0

Happy with the results

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February 21, 2025

5.0

Very professional. Good communication.

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February 19, 2025

5.0

Clearly explained the process, procedure went perfectly, about 20-25 minutes and afterwards Dr. Tosiou explained the results to my family member & myself. I highly recommended Dr. Tosiou & all of his staff.

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February 19, 2025

5.0

Understanding and caring.

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February 15, 2025

5.0

Dr. Tosiou was excellent. He is very thorough and listens. I felt I was in good hands.

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February 15, 2025

5.0

experience was as expected. no surprises. no complications.

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February 10, 2025

5.0

Very welcoming and explained everything that needed to be done based on my issues.

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February 10, 2025

5.0

The doctor gave me positive thoughts when I was so nervous for the procedure I'm having he made my fears and worries go away and now I don't feel so scared! Very professional.

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February 08, 2025

5.0

friendly, professional service/team

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February 03, 2025

5.0

I only had a short interaction with him, but he was very nice and informative.

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February 03, 2025

5.0

Outstanding care

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February 03, 2025

5.0

Dr Tosiou has always been my Dr, and very responsive whenever I have needed his care.

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February 03, 2025

5.0

Listens and communicates well

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January 31, 2025

5.0

When I arrived at the hospital early he was just finishing up with his last patient and he took me right away. I was in and out in just 30 minutes. Very good service from him and his staff.

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January 31, 2025

5.0

He was calming and reassuring.

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January 30, 2025

5.0

He takes his time to listen to your concerns

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January 27, 2025

5.0

Great care. Friendly people who care about their patients. Competency.

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January 27, 2025

5.0

He was friendly and the procedure went well. Had no pain or bleeding from my procedure.

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January 27, 2025

5.0

Very nice, takes time to answer all questions and explains everything very well.

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January 27, 2025

5.0

Went well

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January 27, 2025

5.0

Direct and to the point. No nonsense. Thanks

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January 26, 2025

5.0

Took the time to listen and suggest a plan

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January 25, 2025

5.0

To the point, knowledgeable, good bedside manner

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January 25, 2025

5.0

I felt well informed and taken care of by Dr Tosiou.

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January 24, 2025

5.0

Dr. Tosiou listens, is always understanding, and takes the time to explain options to make sure you have all the information needed to make an informed decision about your care.

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January 23, 2025

5.0

Dr. Alexander S. Tosiou was also attentive and comforting. He give great advice and offered quick options and solutions.

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January 23, 2025

5.0

Good

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January 20, 2025

5.0

He has been my doctor for a long time. I have complete faith and trust in him.

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January 20, 2025

5.0

Honest, easy to talk to

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January 18, 2025

5.0

I feel he is an expert on doing this procedures

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January 16, 2025

5.0

Very thorough

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January 10, 2025

5.0

Dr Tosiou main reason.

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January 08, 2025

5.0

informed me completely of the procedure.

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January 03, 2025

5.0

Very nice and informative

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January 03, 2025

5.0

Ease to talk to. Feel confident in treatment. Explained pre and after surgery.

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January 03, 2025

5.0

Very professional and caring doctor.

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December 29, 2024

5.0

Found the answer to my problem

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December 23, 2024

5.0

Trustworthy and kind!

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December 23, 2024

5.0

He explained the procedure ahead of time and answered any questions I had.

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December 21, 2024

5.0

Concern empathy professional knowledgeable

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December 21, 2024

5.0

Procedure was quickly and efficiently completed

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December 20, 2024

5.0

Helped calm me knowing i was nervous before my procedure.

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December 20, 2024

5.0

His demeanor puts you at ease immediately. I would recommend him to anyone for anything!

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December 19, 2024

5.0

He explains the procedure well. He is on time. Efficient.

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December 17, 2024

5.0

Been going to Dr. Tosiou for over 20 yrs. Never had an issue. Very good doctor

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December 15, 2024

5.0

He listened to my concerns and has put a plan of action in place

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December 13, 2024

5.0

He is a Dr. that cares

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December 13, 2024

5.0

Spent solid time with me going over all the details and path forward

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December 09, 2024

5.0

Dr. Tosiou has performed several colonoscopies and endoscopies for me over the years. He has always been thorough and thoughtful. I appreciate the time he has taken to explain the results and change meds if necessary.

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December 06, 2024

5.0

Friendly and positive! Made me feel at ease.

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December 02, 2024

5.0

Have been going to him for many years. He is the best.

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December 02, 2024

5.0

Very kind

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Disclosures

Alexander S. Tosiou, MD reported no external professional relationships for calendar year 2024.

External Professional Relationships

Pharmaceutical, device, and biotechnology companies frequently collaborate with basic scientists and physicians within an academic medical center to help advance science and improve patient care. These relationships are important in achieving scientific breakthroughs and in establishing the effectiveness and safety of promising new therapies. In order to assure objectivity in clinical research and patient care, the Northwestern University Feinberg School of Medicine (Feinberg), Northwestern Memorial HealthCare, Children's Hospital of Chicago Medical Center, and the Shirley Ryan AbilityLab have adopted integrity policies that require research and clinical faculty (in full-time, part-time, and unpaid/voluntary categories) to report compensated and uncompensated external industry relationships. Patients are encouraged to discuss these disclosures with their physician as well as to inquire as to how these relationships are overseen by Feinberg. To learn more about our Disclosure and Professional Integrity Policy, and the conflict of interest policies of our joint affiliate survey partners, please go to our Office for Regulatory Affairs Policies page.

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