AHA Coding Clinic® for ICD-9 - 2010 Issue 4; VOLUMES 1 & 2 NEW/REVISED CODES

Post Transfusion Purpura (PTP)

Effective October 1, 2010, code 287.4, Secondary thrombocytopenia, has been expanded to create a unique code (287.41) to describe post transfusion purpura (PTP). Post transfusion purpura (PTP), an uncommon potentially fatal complication, develops within 5 to 10 days following transfusion of blood products and is characterized by the rapid onset of severe thrombocytopenia. The body creates alloantibodies in response to the platelets’ antigens present in transfused blood. PTP is caused by antibody mediated destruction of both donor platelets as well as the patient’s own platelets and symptoms can include profound thrombocytopenia, purpura...

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