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. More.

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