D55
D55 — Anemia due to enzyme disorders
Non-billable headerICD-10-CM
D55 is a non-billable header ICD-10-CM code for anemia due to enzyme disorders. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- drug-induced enzyme deficiency anemia (D59.2)
Other codes that can never be billed with D55
These codes carry an Excludes1 note pointing at D55. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading D55 alone.
Risk adjustment
D55 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead D55
6 child codes. Green means billable.
- D55.0Anemia due to glucose-6-phosphate dehydrogenase [G6PD] deficiency
- D55.1Anemia due to other disorders of glutathione metabolism
- D55.2Anemia due to disorders of glycolytic enzymes
- D55.3Anemia due to disorders of nucleotide metabolism
- D55.8Other anemias due to enzyme disorders
- D55.9Anemia due to enzyme disorder, unspecified
Questions about D55
- Is D55 a billable ICD-10-CM code?
- No. D55 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does D55 sit in the tabular list?
- Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89), in the block Hemolytic anemias (D55-D59).
- What cannot be coded together with D55?
- D55 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.