AHA Coding Clinic® for ICD-9 - 2008 Issue 4; VOLUMES 1 AND 2 NEW/REVISED CODES

Heparin-Induced Thrombocytopenia (HIT)

Effective October 1, 2008, a new code 289.84, Heparin-induced thrombocytopenia (HIT), has been created to distinguish HIT from other drug-induced thrombocytopenias. Heparin is one of the most frequently prescribed medications with 12,000,000 patients having some heparin exposure in U.S. hospitals annually. Heparin usage can lead to one of the most important and devastating adverse reactions that can confront physicians, HIT. HIT is a distinct and relatively common life-threatening clinical entity that will occur in 3-5% of all patients receiving unfractionated heparin for at least 5 days. It is a humoral immune-mediated reaction causing an abrupt...

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