C91.6

Clinical Information

• A lymphoid leukemia characterized by a profound lymphocytosis with or without lymphadenopathy, hepatosplenomegaly, frequently rapid progression, and short survival. It was formerly called t-cell chronic lymphocytic leukemia.

• An aggressive t-cell leukemia, characterized by the proliferation of small to medium sized prolymphocytes with a mature t-cell phenotype, involving the blood, bone marrow, lymph nodes, liver, spleen, and skin. who, 2001)

Details

• C91.6 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 C91.6 became effective on October 1, 2022.

• This is the American ICD-10-CM version of C91.6 – other international versions of ICD-10 C91.6 may differ.