T47.0Poisoning by, adverse effect of and underdosing of histamine H2-receptor blockers

T47.0 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of histamine H2-receptor blockers. It belongs to category T47 (poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal 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 T47 (poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system), T47.0 is specifically for poisoning by, adverse effect of and underdosing of histamine H2-receptor blockers. Related codes cover other antacids and anti-gastric-secretion drugs (T47.1), stimulant laxatives (T47.2), saline and osmotic laxatives (T47.3), other laxatives (T47.4), digestants (T47.5), antidiarrheal drugs (T47.6), emetics (T47.7), other agents primarily affecting gastrointestinal system (T47.8) and 1 more.

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.