This book takes the dense, confusing, and repetitive guidelines for external causes and simplifies them into everyday English. The guidelines are then placed into charts to provide step by step directions on how to interpret the guidelines, including codes, definitions and sequencing. Coders should confirm the code selected using the Tabular List in the ICD-10-CM code book. This publication is designed for used as a supplement to coding textbooks for students and as a quick reference for coders working in the field.The book follows the Official Coding Guidelines for 2019. The book consists of four parts: •ICD-10-CM Changes for 2019•Definitions of terms•Guidelines for selecting codes for external causes of morbidity•Simplified external cause of injuries index