Thrombotic microangiopathy
Thrombotic microangiopathy
M31.1 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
M31.10 identifies thrombotic microangiopathy (TMA) when the specific subtype or underlying cause has not been documented or determined. It is the unspecified fallback within the M31.1 category when neither HSCT-TMA (M31.11) nor another defined TMA variant (M31.19) applies.
M31.11 identifies thrombotic microangiopathy that arises as a direct complication of hematopoietic stem cell transplantation (HSCT), a distinct clinical entity from other TMA subtypes.
M31.19 classifies thrombotic microangiopathies that don't fall under hematopoietic stem cell transplantation-associated TMA (M31.11) or the unspecified category (M31.10) — most notably serving as the designated code for thrombotic thrombocytopenic purpura (TTP).