T48.6Poisoning by, adverse effect of and underdosing of antiasthmatics, not elsewhere classified

T48.6 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of antiasthmatics, not elsewhere classified. 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 1 subcodes must be used instead.

Within T48 (poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system), T48.6 is specifically for poisoning by, adverse effect of and underdosing of antiasthmatics, not elsewhere classified. Related codes cover oxytocic drugs (T48.0), skeletal muscle relaxants [neuromuscular blocking agents] (T48.1), other and unspecified drugs acting on muscles (T48.2), antitussives (T48.3), expectorants (T48.4), other anti-common-cold drugs (T48.5) and other and unspecified agents primarily acting on the respiratory system (T48.9).

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.

Don't report T48.6 together with the conditions in its Excludes1 note: poisoning by, adverse effect of and underdosing of beta-adrenoreceptor agonists not used in asthma therapy (T44.5) and poisoning by, adverse effect of and underdosing of anterior pituitary [adenohypophyseal] hormones (T38.8).

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