ICD-10 Code D61.3 – Idiopathic Aplastic Anemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D61.3 – Idiopathic aplastic anemia
What it is
D61.3 identifies aplastic anemia with no known cause. It means the bone marrow fails to make enough blood cells, leading to pancytopenia.
Clinical signs
Clinical features vary; refer to documentation. Common findings include fatigue, pallor, easy bruising, bleeding, and frequent infections from low red cells, platelets, and white cells.
When to use this code
Use D61.3 when the provider documents idiopathic aplastic anemia or aplastic anemia without an identified cause. You may also use it when the record confirms marrow failure and rules out secondary causes, such as drugs, toxins, radiation, or another disease.
Do not use for
Do not use this code for aplastic anemia with a known cause or for other specified aplastic anemias. Check documentation if the chart describes congenital, acquired, or secondary marrow suppression.
Coding tip
Confirm that the provider specifically documents “idiopathic” or an equivalent unexplained cause before assigning D61.3.