ICD-10-CM > M00-M99 > M30-M36 > M31 > M31.1 M31.1 Thrombotic microangiopathy Non-Billable/Non-Specific Codes M31.10Thrombotic microangiopathy, unspecifiedM31.11Hematopoietic stem cell transplantation-associated thrombotic microangiopathy [HSCT-TMA]M31.19Other thrombotic microangiopathy