T42.8X1Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional)

T42.8X1 is the ICD-10-CM diagnosis code for poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional). It belongs to category T42 (poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs), 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 T42.8X, choose T42.8X1 (Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional)) only when documentation doesn't support a more specific option: poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm (T42.8X2), poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault (T42.8X3), poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined (T42.8X4), adverse effect of antiparkinsonism drugs and other central muscle-tone depressants (T42.8X5) and underdosing of antiparkinsonism drugs and other central muscle-tone depressants (T42.8X6).

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.