What type of testing has been done on ICD-10-CM and ICD-10-PCS?
Both systems have undergone formal testing. The World Health Organization (WHO) field tested the ICD-10 chapters where radical changes were made (e.g., Mental and Behavioral Disorders, Injuries, External Causes of Morbidity and Mortality). CMS conducted a formal test of ICD-10-PCS using Clinical Data Abstraction Centers (CDAC), a CMS contractor. Formal testing of ICD-10-CM has been conducted by the CDAC, the American Hospital Association (AHA), and the American Health Information Management Association (AHIMA). Testing involved coding actual medical records using both ICD-9-CM and either ICD-10-CM or ICD-10-PCS.
