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Z67.A4

Z67.A4: Duffy a and b positive

Billable / specific codeICD-10-CMPOA exempt

Z67.A4 is a billable, specific ICD-10-CM code for duffy a and b positive. It is valid for submission on a claim.

Check Z67.A4 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Duffy phenotype Fy(a+b+)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Phenotype›Duffy›a and b positive
  • Phenotype›Duffy›Fy(a+b+)

Code history

  • addedFY2024-FY2027

    Duffy a and b positive

Other codes under Z67.A

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.