E/M decision-tree process flowchart. Guides the user in determining whether to report the E/M services provided as a new or established patient encounter. Updated CPTÂ Assistant and Clinical Examples in Radiology. Newsletter and CPTÂ Changes. Provide guidance and practical advice on how to best apply CPT codes. List vascular families, genetic testing code modifiers and more. Clinical examples for E/M services codes. Help you learn how to use and report services.