CD-10 Essentials: Applying ICD-10-CM Guidelines (previously ICD-10 Essentials: Determining the Diagnosis) is a companion resource for ICD-10-CM that provides in-depth explanations of everything from the basic format and structure of the ICD-10-CM code set to appropriate application of the coding conventions and guidelines. Using coding examples and case studies, correct code assignment is explained with an emphasis on application of the coding and reporting guidelines, including coding of complex conditions that require multiple codes with specific sequencing requirements. Illustrations, decision trees, and other coding tools designed to enhance understanding of ICD-10-CM and improve coding accuracy are key features in this reference.