Convert ICD-10 Code C12 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
C12 Malignant neoplasm of pyriform sinus		148.1 Mal neo pyriform sinus
I82.C12 Acute embolism and thrombosis of left internal jugular vein		453.86 Ac embl internl jug vein
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

ICD-10 to ICD-9 crosswalk for code C12 - malignant neoplasm of pyriform sinus based on the most recent General Equivalence Mappings (GEMS) information.