Convert ICD-10 Code Z17.1 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
Z17.1 Estrogen receptor negative status [ER-]		V86.1 Estrogen recep neg stat
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 Z17.1 - estrogen receptor negative status [er-] based on the most recent General Equivalence Mappings (GEMS) information.