Now includes January 2021 COVID-19 updates ICD-10-CM updates effective October 1, 2020. New for this edition--Review quizzes to help the reader differentiate between codes for mother and baby, musculoskeletal system and injury, and poisoning, adverse effects, toxic effects and underdosing. This book was developed by a certified coding teacher to help her students and others understand the complicated and confusing coding guides. It translates the guidelines into plain English and places them into tables for easy reference. See also Coding Made Easy books on PCS, External Causes, and E/M coding.