Convert ICD-10 Code T57.3X4A to ICD-9

Source ICD-10 Code		Target ICD-9 Code
T57.3X4A Toxic effect of hydrogen cyanide, undetermined, init encntr		987.7 Tox eff hydrocyan acd gs
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.
T57.3X4A Toxic effect of hydrogen cyanide, undetermined, init encntr		E982.8 Undet pois-gas/vapor NEC
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.

ICD-10 to ICD-9 crosswalk for code T57.3X4A - toxic effect of hydrogen cyanide, undetermined, initial encounter based on the most recent General Equivalence Mappings (GEMS) information.