T45.7Poisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulants

T45.7 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulants. It belongs to category T45 (poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified), 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 T45, choose T45.7 (anticoagulant antagonists, vitamin K and other coagulants) only when documentation doesn't support a more specific option: antiallergic and antiemetic drugs (T45.0), antineoplastic and immunosuppressive drugs (T45.1), vitamins (T45.2), enzymes (T45.3), iron and its compounds (T45.4), anticoagulants and antithrombotic drugs (T45.5), fibrinolysis-affecting drugs (T45.6), other primarily systemic and hematological agents (T45.8) and 2 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.