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D56.0

Billable

Alpha thalassemia

D56.0 is the ICD-10-CM code for Alpha thalassemia. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
D50-D89
Parent
D56
Edition
FY2026

D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism

Includes

  • •Alpha thalassemia major
  • •Hemoglobin H Constant Spring
  • •Hemoglobin H disease
  • •Hydrops fetalis due to alpha thalassemia
  • •Severe alpha thalassemia
  • •Triple gene defect alpha thalassemia

Excludes1 — not coded here

  • •alpha thalassemia trait or minor (D56.3)
  • •asymptomatic alpha thalassemia (D56.3)
  • •hydrops fetalis due to isoimmunization (P56.0)
  • •hydrops fetalis not due to immune hemolysis (P83.2)

Use additional code

  • •code, if applicable, for hydrops fetalis due to alpha thalassemia (P56.99)

Frequently asked questions

What is ICD-10 code D56.0?
D56.0 is the ICD-10-CM code for "Alpha thalassemia". It falls under D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
Is D56.0 a billable code?
Yes — D56.0 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from D56.0?
Excludes1 (not coded here): alpha thalassemia trait or minor (D56.3); asymptomatic alpha thalassemia (D56.3); hydrops fetalis due to isoimmunization (P56.0); hydrops fetalis not due to immune hemolysis (P83.2).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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