T50.A21Poisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional)

T50.A21 is the ICD-10-CM diagnosis code for poisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional). It belongs to category T50 (poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T50.A2, choose T50.A21 (Poisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional)) only when documentation doesn't support a more specific option: poisoning by mixed bacterial vaccines without a pertussis component, intentional self-harm (T50.A22), poisoning by mixed bacterial vaccines without a pertussis component, assault (T50.A23), poisoning by mixed bacterial vaccines without a pertussis component, undetermined (T50.A24), adverse effect of mixed bacterial vaccines without a pertussis component (T50.A25) and underdosing of mixed bacterial vaccines without a pertussis component (T50.A26).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.