This document provides guidance on assessing the abdomen, anus, and rectum. It outlines the objectives of the assessment and covers topics like the subjective history, inspection, auscultation including bowel sounds and vascular sounds, percussion including ascites, and palpation including specific points for organ pathology. It describes approaches for different populations from infants to older adults. Common abnormalities are defined. The summary provides an overview of the assessment process and documentation.