What ICD-10 codes are used for ITP?
Immune thrombocytopenic purpura (ITP) is an autoimmune disorder characterized by a low platelet count. The most relevant ICD-10 code for ITP is D69.3 – Immune thrombocytopenic purpura, unspecified, which is used when ITP is diagnosed but the exact type or underlying cause hasn’t been identified. This code applies to conditions:
- hemorrhagic (thrombocytopenic) purpura
- idiopathic thrombocytopenic purpura
- tidal platelet dysgenesis
It falls under the category of Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
Aside from this, here are other related codes, along with brief clinical descriptions:
- D69.42 – Congenital and hereditary thrombocytopenia purpura: This is used for platelet disorders present at birth or inherited genetically, leading to low platelet counts. Unlike ITP, which is acquired and autoimmune in nature, this condition is not caused by the immune system attacking platelets.
- D69.59 – Other secondary thrombocytopenia: This refers to low platelet counts that occur as a result of another underlying condition, such as infections, medications, or chemotherapy. It's similar to ITP in that platelet levels drop, but the cause is external or secondary rather than autoimmune.
- D69.49 – Other primary thrombocytopenia: This code covers platelet disorders where the cause is unknown but not secondary to another condition. It's somewhat similar to ITP in being a primary condition, but it doesn't specifically refer to immune-mediated platelet destruction.