Convert ICD-10 Code Y63.6 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
Y63.6 Undrdose & nonadmin of necess drug, medicament or biolg sub		E873.6 Nonadmin necess medicine
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.
Y63.6 Undrdose & nonadmin of necess drug, medicament or biolg sub		E873.8 Failure in dosage NEC
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 Y63.6 - underdosing and nonadministration of necessary drug, medicament or biological substance based on the most recent General Equivalence Mappings (GEMS) information.