Medical Coding (MC) is the transformation of verbal descriptions of diseases, injuries, and procedures into alphanumeric designations. The coding of health-related data permits access to medical records by diagnoses and procedures for use in clinical care, research, and education. Currently, reimbursement of hospital and physician claims for Medicare patients depends entirely on the assignment of codes to describe diagnoses, services, and procedures provided. Today, there are many demands for accurately coded data from the medical record in all types of health care institutions. In addition to their use on claims for reimbursement, codes are included on data sets used to evaluate the processes and outcomes of healthcare. Coded data are also used internally by institutions for quality management activities, case management, planning, marketing, and other administrative and research activities.