Convert ICD-10 Code T71.20XD to ICD-9

Source ICD-10 Code		Target ICD-9 Code
T71.20XD Asphyx d/t sys oxy defic d/t low oxy in air unsp cause, subs		V58.89 Other specfied aftercare
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 T71.20XD - asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air due to unspecified cause, subsequent encounter based on the most recent General Equivalence Mappings (GEMS) information.