AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2021 Issue 4; ICD-10-CM New/Revised Codes

Thrombotic Microangiopathy

Code M31.1, Thrombotic microangiopathy, was expanded to identify hematopoietic stem cell transplantation associated microangiopathy (HSCT-TMA), along with unspecified and other specified types of thrombotic microangiopathies as follows:M31.10, Thrombotic microangiopathy, unspecified M31.11, Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]  M31.19, Other thrombotic microangiopathy HSCT-TMA is a serious, life-threatening complication of hematopoietic stem cell transplantation that is caused by endothelial damage. The condition occurs in both autologous and allogeneic transplants but is more common in allogeneic transplants. HSCT-TMA typically presents within the first 100 days post-transplantation. Patients generally present with signs of microangiopathic hemolytic anemia, consumptive...

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