T48.205Adverse effect of unspecified drugs acting on muscles

T48.205 is the ICD-10-CM diagnosis code for adverse effect of unspecified drugs acting on muscles. It belongs to category T48 (poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system), 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 T48.20, choose T48.205 (Adverse effect of unspecified drugs acting on muscles) only when documentation doesn't support a more specific option: poisoning by unspecified drugs acting on muscles, accidental (unintentional) (T48.201), poisoning by unspecified drugs acting on muscles, intentional self-harm (T48.202), poisoning by unspecified drugs acting on muscles, assault (T48.203), poisoning by unspecified drugs acting on muscles, undetermined (T48.204) and underdosing of unspecified drugs acting on muscles (T48.206).

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.