Chest
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After a patient encounter, the physician uses two coding systems to bill for the service rendered to the patient. The Current Procedural Terminology (CPT) code is used to describe the encounter or procedure. The International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) code is used to describe the diagnosis(es) of the patient. ⋯ The requirement for accurate and comprehensive documentation cannot be emphasized enough. All of the coding and documentation changes will be a challenge to pulmonary, critical care, and sleep physicians. They must be prepared fully when ICD-10-CM coding begins and ICD-9-CM coding stops abruptly on October 1, 2015.