Chapter 3 guidelines
Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
D50-D89
Covers diseases of the blood and blood-forming organs, and certain disorders involving the immune mechanism, including anemias and coagulation defects.
Key coding points
- •Anemia due to a chronic condition (e.g. chronic kidney disease, neoplasm) is often coded with a combination or dual-coding convention — check for a 'code first' or 'in diseases classified elsewhere' note.
- •Sickle-cell conditions have detailed subclassifications by crisis type (with/without crisis, acute chest syndrome, splenic sequestration) that should be matched carefully to the documentation.