Is Z67.A4 a billable ICD-10 code?

Yes. Z67.A4 (Duffy a and b positive) is billable and can be used for insurance claims. Always verify payer-specific requirements.

Z67.A4 ✓ Billable

Duffy a and b positive

Q: What is ICD-10 code Z67.A4?

ICD-10-CM code Z67.A4 stands for "Duffy a and b positive". It is a billable code in the Factors Influencing Health Status chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Factors Influencing Health Status

Code

Z67.A4

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Factors Influencing Health Status

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code Z67.A4?

ICD-10-CM code Z67.A4 represents Duffy a and b positive. It is a billable diagnosis code in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.

Is Z67.A4 billable?

Yes. Z67.A4 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is Z67.A4 in?

Z67.A4 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.

Related codes in the Z67 category

Z67 Blood type Non-billable Z67.1 Type A blood Non-billable Z67.2 Type B blood Non-billable Z67.3 Type AB blood Non-billable Z67.4 Type O blood Non-billable Z67.9 Unspecified blood type Non-billable Z67.A Duffy phenotype Non-billable Z67.10 Type A blood, Rh positive Billable

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