ICD-10-CM › Z00-Z99 › Z67 › Z67.A Duffy phenotype › Z67.A1
Z67.A1
Duffy null
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 null
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.
- Agranulocytosis
- Duffy phenotype
- Decrease > absolute neutrophile count
- Neutropenia, neutropenic > benign ethnic
- Necrosis, necrotic > pharynx > in granulocytopenia
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative > intestine, intestinal > granulocytopenic
- Phenotype > Duffy > Fy
- Phenotype > Duffy > null
Codes in the same group
| Code | Description | Status |
|---|---|---|
| Z67.A2 | Duffy a positive | Valid |
| Z67.A3 | Duffy b positive | Valid |
| Z67.A4 | Duffy a and b positive | Valid |