Dr. Harold Mozwecz, MD, FACG | Saint Charles, IL | Gastroenterologist

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Dr. Harold Mozwecz is a gastroenterologist who earned his medical degree from the University of Illinois College of Medicine. He completed his residency at the University of Illinois and pursued fellowship training at the University of Illinois of Chicago in 1990. With over four decades of practice experience, Dr. Mozwecz holds board certification in internal medicine from the American Board of Internal Medicine and is a Fellow of the American College of Gastroenterology. He provides care in English.

Dr. Mozwecz practices at Duly Health and Care locations in Saint Charles, Winfield, and Warrenville, Illinois, and maintains hospital privileges at Advocate Good Samaritan Hospital. His clinical expertise includes treating conditions such as hemorrhoids, colon polyps, and diverticular disease. He performs essential diagnostic procedures including colonoscopy and lower GI endoscopy. Patients rate Dr. Mozwecz 2.9 out of 5 stars on average.

Overview based on verified provider data

accepting new patients
2.9

24 Ratings
41 years of experience
16 insurance plans accepted
speaks English
University of Illinois
12 written reviews
1 specialty
13 areas of expertise
1 board certification
1 hospital affiliation
3 office locations
Male

Flexible scheduling

Based on patient feedback. Read the reviews

24 ratings & reviews

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Showing 1 to 10 of 12 reviews

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Everyone was Great.

December 13th, 2025 | Source: Partner

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Dr. Mozwecz has been my doctor for several years. He listens to me and takes the time to explain what is happening and ease my concerns. He puts me at ease. I highly Recommend him.

December 13th, 2025 | Source: Partner

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Dr Mozwetz listened carefully, and we decided on a plan.

November 30th, 2025 | Source: Partner

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Great

November 15th, 2025 | Source: Partner

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Great doctor!

January 26th, 2025 | Source: Partner

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I saw this doctor following a CT showing a fatty liver. For context, I’ve never had this issue before and I weigh less than I have for most of my life. His best advice was “you’re 180 lbs at 5’5, no testing needs to be done and that’s all I need to know”. With this joke of a doctor, your problems aren’t real if you’re over a certain weight. You’re to blame for everything because of your “eating habits”. Mind you, he did not ask a single question about my diet or exercise, nor did the man even see what I look like considering he rejected the video call and called me over the phone instead. He made assumptions about me and my entire lifestyle based off my weight and dismissed me.

December 27th, 2021

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I giving him 1 star, because he was there, but go to him that was waisted time and money.

February 7th, 2020

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Totally agree with other negative reviews of Harold L. Mozwecz, MD. He was the most condescending doctor I have ever interacted with, either as a patient or advocate. As he gathered information regarding symptoms pertaining to my chronic gastrointestinal disorder I felt like I was on trial. He was borderline argumentative and dismissed almost everything I had to say. It would seem that he prefers to do all of the talking and expects all responses to be limited to one word. I left the appointment feeling hopeless and worse off than when I arrived.

January 30th, 2019

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Saw him in office for a consultation. He talked down to and belittled me, dismissed my painful symptoms and overall was a waste of my time. He may have a license but he is lacking in basic decency and has terrible communication skills. If you want to be dismissed and abused...he’s your guy!

December 3rd, 2018

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I thought at first that this doctor would be good with me. He was relaxed. But he showed little interest in talking with me about my illness. The last straw was when I was sedated just before a colonoscopy, he started a conversation about my daily medication. I was already totally out of it. STRANGE. I am DONE with this guy!

March 18th, 2016

Duly Health and Care

3310 W Main StSaint Charles, IL 60175

Tel: (630) 717-2600

Duly Health and Care

25 N Winfield RdWinfield, IL 60190

Tel: (630) 717-2600

Duly Health and Care

4575 Weaver PkwyWarrenville, IL 60555

Tel: (630) 717-2600


Dr. Harold Mozwecz, MD, FACG	Dr. Darran Moxon, MD	Ji Soo Choi, APRN	Jan Seiler, APRN
Gastroenterology	Gastroenterology	Gastroenterology	Gastroenterology
Accepts New Patients	Accepts New Patients	Accepts New Patients	Accepts New Patients
2.9 (24 Ratings)	4.3 (50 Ratings)	0 (0 Ratings)	0 (0 Ratings)
41 Years of Experience
No Virtual Visit Option	No Virtual Visit Option	Virtual Visit Available	Virtual Visit Available
Speaks English	Speaks English	Speaks English	Speaks English
Saint Charles , IL	St Charles , IL	SACRAMENTO , CA	Montgomery , AL
Med School: University of Illinois College of Medicine	Med School: University of Illinois	Med School: New York University	Med School: Georgia State University
Current Profile	View Profile	View Profile	View Profile

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Aetna
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Medicare
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North Shore LIJ CareConnect
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UnitedHealthcare
UPMC Health Plan

Gastroenterology

Abdominal Pain
Acid Reflux Disease (Gastroesophageal Reflux / GERD)
Acid Reflux Disease (GERD)
Celiac Disease
Colon Cancer
Colonoscopy
Constipation
Endoscopy (Endoscopic Surgery)
Heartburn
Hemorrhoids
Hepatitis C
Irritable Bowel Syndrome (IBS)
Ulcerative Colitis

BOARD CERTIFICATIONS

American Board of Internal Medicine

Internal medicine

MEDICAL LICENSE

Medical Doctor, Illinois, 2026, Active

EDUCATION & TRAINING

Fellowship

University of Illinois

University of Illinois, Chicago, IL

University of Illinois of Chicago1990

Residency

University of Illinois

University of Illinois, Chicago, IL

University of Illinois College of Medicine at Chicago Program

University of Illinois of Chicago (1986)

Medical School

University of Illinois College of MedicineGraduated in 1985

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Where is Dr. Harold Mozwecz's office located?: Dr. Harold Mozwecz's office is located at 3310 W Main St, Saint Charles, IL, 60175.
Which hospitals is Dr. Harold Mozwecz affiliated with?: Dr. Harold Mozwecz is affiliated with Advocate Good Samaritan Hospital.
Does Dr. Harold Mozwecz accept my insurance?: You can see the insurance plans that Dr. Harold Mozwecz accepts on their Vitals profile.
What languages does Dr. Harold Mozwecz speak?: Dr. Harold Mozwecz speaks English.
Does Dr. Harold Mozwecz accept virtual/telehealth appointments?: Dr. Harold Mozwecz has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

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