Convert ICD-10 Code C31.1 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
C31.1 Malignant neoplasm of ethmoidal sinus		160.3 Mal neo ethmoidal sinus

ICD-10 to ICD-9 crosswalk for code C31.1 - malignant neoplasm of ethmoidal sinus based on the most recent General Equivalence Mappings (GEMS) information.