C91

C91: Lymphoid leukemia

Non-billable headerICD-10-CM

C91 is a non-billable header ICD-10-CM code for lymphoid leukemia. 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.

personal history of leukemia (Z85.6)

Other codes that can never be billed with C91

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

C94Other leukemias of specified cell type
D61.81Pancytopenia
D72.8Other specified disorders of white blood cells
D76Other specified diseases with participation of lymphoreticular and reticulohistiocytic tissue
Z85.6Personal history of leukemia
T66Radiation sickness, unspecified
T66.XXXARadiation sickness, unspecified, initial encounter
T66.XXXDRadiation sickness, unspecified, subsequent encounter

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

9 child codes. Green means billable.