ICD-10-CM > C00-D49 > C81-C96 > C91 > C91.Z C91.Z Other lymphoid leukemia Non-Billable/Non-Specific Applicable To T-cell large granular lymphocytic leukemia (associated with rheumatoid arthritis) Codes C91.Z0Other lymphoid leukemia not having achieved remissionC91.Z1Other lymphoid leukemia, in remissionC91.Z2Other lymphoid leukemia, in relapse