Table 6.

Number of patients with ICD-9-CM (International Classification of Diseases, Ninth Revision, Clinical Modification) codes with or without mentions of drugs or SNOMED CT (Systematized Nomenclature of Medicine Clinical Terms) concepts.

Cancer type	ICD-9-CM codes without mentions of drugs or SNOMED CT concepts, n/N (%)	ICD-9-CM codes with mentions of drugs or SNOMED CT concepts, n/N (%)
Breast	479/690 (69.4)	211/690 (30.6)
Colorectal	349/579 (60.3)	230/579 (39.7)
Total	828/1269 (65.2)	441/1269 (34.8)