D56 – Thalassemia
ICD-10-CM 2027 diagnosis code · Hemolytic anemias
ICD-10-CM code
D56
- Code
D56(claims format:D56)- Description
- Thalassemia
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
- Block
- D55-D59 Hemolytic anemias
Billable codes under D56
D56 is a header code and cannot be used on claims. Choose the most specific code:
- D56.0 – Alpha thalassemiaBillable
- D56.1 – Beta thalassemiaBillable
- D56.2 – Delta-beta thalassemiaBillable
- D56.3 – Thalassemia minorBillable
- D56.4 – Hereditary persistence of fetal hemoglobin [HPFH]Billable
- D56.5 – Hemoglobin E-beta thalassemiaBillable
- D56.8 – Other thalassemiasBillable
- D56.9 – Thalassemia, unspecifiedBillable
Notes for D56
Excludes1 (not coded here):
- sickle-cell thalassemia (D57.4-)
Frequently asked questions
What is ICD-10 code D56?
D56 is the ICD-10-CM code for thalassemia, in the block D55-D59 (Hemolytic anemias).
Is D56 a billable code?
No. D56 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.