Idiopathic aplastic anemia

This code signifies a rare and severe form of bone marrow failure where the body stops producing enough new blood cells (red, white, and platelets) without an identifiable cause. It results in pancytopenia, leading to symptoms like fatigue, infections, and bleeding.

Use this code when documentation explicitly states a diagnosis of idiopathic aplastic anemia. This diagnosis is typically made after excluding other known causes of aplastic anemia, often through bone marrow biopsy and extensive laboratory testing.

• Ensure the "idiopathic" nature is clearly documented; otherwise, a code for secondary aplastic anemia may be more appropriate.
• Do not confuse with other forms of aplastic anemia (e.g., drug-induced, post-infectious) which have distinct codes.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless a complication of the anemia is being treated.