This document outlines assessments of digestive and gastrointestinal function including physical exams of the mouth, abdomen, anus and perianal areas as well as diagnostic evaluations like blood tests, stool tests, breath tests, imaging studies and procedures to analyze gastric function. Physical exams inspect areas like the mouth, tongue, teeth and abdomen while diagnostic tests evaluate blood counts, liver and digestive enzyme levels and stool contents. Imaging and procedures help further analyze the gastrointestinal tract.