ICD-10-CM › Z00-Z99 › Z67 › Z67.A Duffy phenotype › Z67.A4
Z67.A4
Duffy a and b positive
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2025 to now.
- FY2025 Added to the code set Duffy a and b positive
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Duffy phenotype
- Phenotype > Duffy > Fy
- Phenotype > Duffy > a and b positive
Codes in the same group
| Code | Description | Status |
|---|---|---|
| Z67.A1 | Duffy null | Valid |
| Z67.A2 | Duffy a positive | Valid |
| Z67.A3 | Duffy b positive | Valid |