This comprehensive guide is your key to understanding and applying the official codes of the ICD-9-CM. With complete overviews of all three volumes of the ICD-9- CM, this practical resource provides both detailed information on the importance and background of medical coding and thorough guidelines for each of the coding classifications. Clear examples demonstrate the coding process, and exercises within each chapter test your comprehension, giving you everything you need to code accurately and provide essential support to the health care facility.