ICD-10 Code D56.9 – Thalassemia, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D56.9 – Thalassemia, unspecified
What it is
D56.9 identifies thalassemia when the record does not specify the alpha or beta type. Use it for an inherited hemoglobin disorder causing reduced globin chain production.
Clinical signs
Clinical features vary; refer to documentation. Common findings include anemia, fatigue, pallor, and possible splenomegaly, but the chart should support the diagnosis.
When to use this code
Use D56.9 when the provider documents thalassemia but does not identify the subtype. It also fits situations where the note confirms a thalassemia disorder and further detail is unavailable. Check documentation before selecting this unspecified code.
Do not use for
Do not use this code if the record clearly identifies alpha thalassemia, beta thalassemia, or another specific form. Avoid it when the anemia is due to a different cause or thalassemia is only suspected.
Coding tip
If the subtype is missing, query for clarification before defaulting to D56.9.