D56.4 ICD-10-CM Code: Hereditary persistence of fetal hemoglobin [HPFH]
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
D56.4Hereditary persistence of fetal hemoglobin [HPFH]
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where D56.4 sits
- 1
Chapter 3
Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
- 2
Section
Hemolytic anemias (D55-D59)
- 3
Category D56
Thalassemia
- 4
Code D56.4
Hereditary persistence of fetal hemoglobin [HPFH]
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for D56.4.
Code first
No “code first” instruction is listed for D56.4.
Use additional code
No “use additional code” instruction is listed for D56.4.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for D56.4.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for D56.4.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code D56.4 mean?
D56.4 is the FY 2027 U.S. ICD-10-CM code for “Hereditary persistence of fetal hemoglobin [HPFH].”
Is D56.4 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, D56.4 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is D56.4 located in ICD-10-CM?
D56.4 is listed in Chapter 3, Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89), within Hemolytic anemias (D55-D59) (D55–D59), under category D56, Thalassemia.
What coding notes are listed for D56.4?
No inclusion terms are listed for D56.4 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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