ICD-10-CM · Billable Code
D56.4 — Hereditary persistence of fetal hemoglobin [HPFH]
Chapter D50-D89: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
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Common questions about D56.4 (Hereditary persistence of fetal hemoglobin [HPFH])
What does ICD-10 code D56.4 mean?
D56.4 is the ICD-10-CM 2025 code for Hereditary persistence of fetal hemoglobin [HPFH]. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is D56.4 a billable diagnosis code?
Yes, D56.4 is a billable / specific ICD-10-CM code, meaning it can be used by clinicians and hospitals as a primary or secondary diagnosis on claims and electronic health records.
Which ICD-10 chapter does D56.4 belong to?
D56.4 belongs to the chapter "Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism" (codes D50-D89). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Hereditary persistence of fetal hemoglobin [HPFH]?
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Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗