Z67.A4 – Duffy a and b positive
ICD-10-CM 2027 diagnosis code · Blood type (Z67)
ICD-10-CM code
Z67.A4
- Code
Z67.A4(claims format:Z67A4)- Description
- Duffy a and b positive
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 21. Factors influencing health status and contact with health services (Z00-Z99)
- Block
- Z67 Blood type (Z67)
- Parent codes
- Z67 › Z67.A
Notes for Z67.A4
Applicable to:
- Duffy phenotype Fy(a+b+)
Index terms for Z67.A4
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in Z67.A
- Z67.A1 – Duffy nullBillable
- Z67.A2 – Duffy a positiveBillable
- Z67.A3 – Duffy b positiveBillable
Frequently asked questions
What is ICD-10 code Z67.A4?
Z67.A4 is the ICD-10-CM code for duffy a and b positive, in the block Z67 (Blood type (Z67)).
Is Z67.A4 a billable code?
Yes. Z67.A4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does Z67.A4 belong to?
It belongs to category Z67 – Blood type.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.