ICD-10-CM > C00-D49 > C81-C96 > C91 > C91.9 C91.9 Lymphoid leukemia, unspecified Non-Billable/Non-Specific Codes C91.90Lymphoid leukemia, unspecified not having achieved remissionC91.91Lymphoid leukemia, unspecified, in remissionC91.92Lymphoid leukemia, unspecified, in relapse