Convert ICD-10 Code C71.9 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
C71.9 Malignant neoplasm of brain, unspecified		191.9 Malig neo brain NOS

ICD-10 to ICD-9 crosswalk for code C71.9 - malignant neoplasm of brain, unspecified based on the most recent General Equivalence Mappings (GEMS) information.