Convert ICD-10 Code T50.A21A to ICD-9

Source ICD-10 Code		Target ICD-9 Code
T50.A21A Poisoning by mixed bact vaccines w/o a pertuss, acc, init		978.9 Pois-mix bacter vaccines
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.
T50.A21A Poisoning by mixed bact vaccines w/o a pertuss, acc, init		E858.1 Acc poisn-systemic agent
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 T50.A21A - poisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional), initial encounter based on the most recent General Equivalence Mappings (GEMS) information.