Is D59.1 a billable ICD-10-CM code?

No. D59.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does D59.1 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).

D59.1

D59.1 — Other autoimmune hemolytic anemias

Non-billable headerICD-10-CM

D59.1 is a non-billable header ICD-10-CM code for other autoimmune hemolytic anemias. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

Evans syndrome (D69.41)
hemolytic disease of newborn (P55.-)
paroxysmal cold hemoglobinuria (D59.6)

Risk adjustment

D59.1 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 D59.1

5 child codes. Green means billable.

Related codes at this level

Codes that share D59. If D59.1 is not quite right, the correct code is usually one of these.

Questions about D59.1

Is D59.1 a billable ICD-10-CM code?: No. D59.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does D59.1 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).