ICD-10-CM
ICD-10 code for Hemoglobin fetal, hereditary persistence (HPFH): D56.4
The ICD-10-CM index points "Hemoglobin fetal, hereditary persistence (HPFH)" to D56.4, Hereditary persistence of fetal hemoglobin [HPFH]. D56.4 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in D56
A header groups codes and is not billed. A billable code is one you can report.
- D56ThalassemiaHeader
- D56.0Alpha thalassemiaBillable
- D56.1Beta thalassemiaBillable
- D56.2Delta-beta thalassemiaBillable
- D56.3Thalassemia minorBillable
- D56.4Hereditary persistence of fetal hemoglobin [HPFH]Billable
- D56.5Hemoglobin E-beta thalassemiaBillable
- D56.8Other thalassemiasBillable
- D56.9Thalassemia, unspecifiedBillable
Excludes1
Excludes1 means these codes are not reported together.
From D56. A note on a category applies to every code under it.
Related conditions
Related pages
- D56.4 code detailsNotes, nearby codes, CMS-HCC group
- Category D56Every code under it
- Chapter 3Diseases of the blood and blood-forming organs
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Hemoglobin fetal, hereditary persistence (HPFH)?
The ICD-10-CM index points "Hemoglobin fetal, hereditary persistence (HPFH)" to D56.4, Hereditary persistence of fetal hemoglobin [HPFH]. D56.4 is a billable code.
Is D56.4 billable?
Yes. D56.4 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to D56.4?
The CDC tabular list gives 1 Excludes1 note (not coded together) for D56.4 and the categories above it. They are listed on this page.
What chapter is D56.4 in?
Chapter 3. Diseases of the blood and blood-forming organs.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.