C91.9

Clinical Information

• A malignant lymphocytic neoplasm of b-cell or t-cell lineage involving primarily the bone marrow and the peripheral blood. This category includes precursor or acute lymphoblastic leukemias and chronic leukemias.

• A progressive, proliferative disease of blood cells, originating from lymphoid cells.

• A type of cancer in which the bone marrow makes too many lymphocytes white blood cells).

• Leukemia associated with hyperplasia and overactivity of the lymphoid tissue; there are increased numbers of circulating malignant lymphocytes and lymphoblasts.

• Leukemia associated with hyperplasia of the lymphoid tissues and increased numbers of circulating malignant lymphocytes and lymphoblasts.

Details

• C91.9 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.

• The 2023 edition of ICD-10-CM C91.9 became effective on October 1, 2022.

• This is the American ICD-10-CM version of C91.9 – other international versions of ICD-10 C91.9 may differ.