C91.4

C91.4: Hairy cell leukemia

Non-billable headerICD-10-CM

C91.4 is a non-billable header ICD-10-CM code for hairy cell leukemia. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Leukemic reticuloendotheliosis

Excludes1 inherited from the categories above C91.4

A category’s note binds every code beneath it.

Written on C91: Lymphoid leukemia

personal history of leukemia (Z85.6)

Other codes that can never be billed with C91.4

Their own Excludes1 notes name this code, so the conflict is not listed above.

C94Other leukemias of specified cell type
D61.81Pancytopenia
D76Other specified diseases with participation of lymphoreticular and reticulohistiocytic tissue
D72.825Bandemia

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead C91.4

3 child codes. Green means billable.