D56.3 – Thalassemia minor
ICD-10-CM 2027 diagnosis code · Hemolytic anemias
ICD-10-CM code
D56.3
- Code
D56.3(claims format:D563)- Description
- Thalassemia minor
- Billable
- Yes – valid for HIPAA-covered transactions
- 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
- Parent codes
- D56
Notes for D56.3
Applicable to:
- Alpha thalassemia minor
- Alpha thalassemia silent carrier
- Alpha thalassemia trait
- Beta thalassemia minor
- Beta thalassemia trait
- Delta-beta thalassemia minor
- Delta-beta thalassemia trait
- Thalassemia trait NOS
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
D56 – Thalassemia
Excludes1 (not coded here):
- sickle-cell thalassemia (D57.4-)
Index terms for D56.3
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in D56
Frequently asked questions
What is ICD-10 code D56.3?
D56.3 is the ICD-10-CM code for thalassemia minor, in the block D55-D59 (Hemolytic anemias).
Is D56.3 a billable code?
Yes. D56.3 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does D56.3 belong to?
It belongs to category D56 – Thalassemia.
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.