Case Study:\ eBook\ Aaron is a 3-year-old with documented "failure to thrive." Although he appears to eat well, he has chronic diarrhea and is not gaining weight as expected. Upper and lower Gls (esophagogastroduodenoscopy and colonoscopy) and food allergy testing are ordered. The current working diagnosis after testing is celiac disease. An appointment with a dietician and nutritionist will be made for Mom.\ \\\\table[[Diagnosis code(s)],[43235],[]]