This item indicates the coding system in which the Comorbidities and Complications (secondary diagnoses) codes are provided.
The CoC currently requires the collection and reporting of up to 10 ICD-9-CM codes describing secondary diagnoses for patients hospitalized for cancer treatment. Currently the use of ICD-10-CM is not mandatory in U.S. hospitals, though it may become so in the future. In the event this occurs cancer registries that maintain or collect this information will need to differentiate between ICD-9-CM and ICD-10-CM code use. The code values and definitions for this item would be expanded as necessary. Allowable codes reported in the Comorbidity and Complications items in
STORE would be re-assessed at the same time.