2013 International Classification of Diseases
What is ICD? The International Classification of Diseases (ICD) is the standard diagnostic coding tool for epidemiology, health management and clinical purposes. This includes the analysis of the general health situation of population groups. It is used to monitor the incidence and prevalence of diseases and other health problems.
ICD-9 is the 9th Revision of the International Classification of Diseases. ICD-9-CM is based on the WHO's 9th Revision.
ICD-9-CM is the official system of assigning codes for diagnosis and procedures associated with hospital utilization in the United States.
The NCHS and the CMS are the official U.S. government agencies responsible for overseeing all changes and modifications to the ICD-9-CM codes.
ICD-10 is the 10th Revision of the International Classification of Diseases. Starting October 1, 2014, ICD-9 will be replaced by ICD-10 codes used to report medical diagnoses and inpatient procedures.
The change does not affect CPT coding for outpatient procedures.
ICD-10 will affect diagnosis and inpatient procedure coding for everyone covered by the Health Insurance Portability Accountability Act (HIPAA).