Z67.A1 ICD-10-CM Code: Duffy null
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
Z67.A1Duffy null
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where Z67.A1 sits
- 1
Chapter 21
Factors influencing health status and contact with health services (Z00-Z99)
- 2
Section
Blood type (Z67)
- 3
Category Z67
Blood type
- 4
Subcategory Z67.A
Duffy phenotype
- 5
Code Z67.A1
Duffy null
Documentation details
Notes for this code
Inclusion terms
- Duffy phenotype Fy(a-b-)
Code first
No “code first” instruction is listed for Z67.A1.
Use additional code
No “use additional code” instruction is listed for Z67.A1.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for Z67.A1.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for Z67.A1.
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 Z67.A1 mean?
Z67.A1 is the FY 2027 U.S. ICD-10-CM code for “Duffy null.”
Is Z67.A1 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, Z67.A1 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 Z67.A1 located in ICD-10-CM?
Z67.A1 is listed in Chapter 21, Factors influencing health status and contact with health services (Z00-Z99), within Blood type (Z67) (Z67–Z67), under category Z67, Blood type and subcategory Z67.A, Duffy phenotype.
What coding notes are listed for Z67.A1?
Its listed inclusion terms are Duffy phenotype Fy(a-b-). No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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Related Z67.A codes
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