Mercy Clinic Gastroenterology - Jefferson

1400 Highway 61 South
Festus, MO 63028
Fax: (636) 933-1981
Hours of Operation:
Monday, Tuesday, Wednesday and Friday: 9 a.m. - 5 p.m. Closed Thursday.

We all experience digestive discomfort now and then. Minor problems become major when they don’t go away and are accompanied by pain, weight loss and other symptoms that disrupt life. Mercy Clinic Gastroenterology - Jefferson treats gastrointestinal disease and disorders of the digestive system including:

  • Inflammatory bowel disease - ulcerative colitis, Crohn’s disease
  • Gastroesophageal reflux
  • Celiac disease
  • Liver disorders
  • Irritable Bowel Syndrome
  • Pancreatic biliary disorders 
  • Colorectal Cancer Screening

If you’ve lived discomfort and disruption, we can improve your quality of life. Whenever you need us, we’re committed to giving you personal attention and great care.

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Learn your risks, how the procedure works and when to schedule one.

Our Providers

Youssef Assioun, MD, Mercy
Mercy Clinic
Edwardo D. Verzola, MD, Mercy
Mercy Clinic