Thrombotic microangiopathy, unspecified

This code represents a severe, life-threatening disorder characterized by widespread microvascular thrombosis, leading to organ damage due to ischemia and microangiopathic hemolytic anemia with thrombocytopenia. It involves damage to small blood vessels, resulting in the formation of tiny blood clots that block blood flow to vital organs.

Use this code when documentation indicates a diagnosis of thrombotic microangiopathy without further specification of its underlying cause (e.g., atypical hemolytic uremic syndrome, TTP). This code is appropriate when the specific etiology of the TMA is unknown or not yet determined.

• Do not use this code if the specific type of thrombotic microangiopathy (e.g., atypical HUS, TTP) is documented; instead, use the more specific code.
• Always review the medical record for any associated conditions or complications, such as renal failure or neurological involvement, and code them separately.
• Ensure documentation clearly states "thrombotic microangiopathy" or a similar phrase, and that no further specificity is provided.