C91.5
C91.5 — Adult T-cell lymphoma/leukemia (HTLV-1-associated)
Non-billable headerICD-10-CM
C91.5 is a non-billable header ICD-10-CM code for adult t-cell lymphoma/leukemia (htlv-1-associated). It cannot be billed on its own: choose one of the more specific child codes below.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Acute variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)
- Chronic variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)
- Lymphomatoid variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)
- Smouldering variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)
Risk adjustment
C91.5 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead C91.5
3 child codes. Green means billable.
Related codes at this level
Codes that share C91. If C91.5 is not quite right, the correct code is usually one of these.
- C91.0Acute lymphoblastic leukemia [ALL]
- C91.1Chronic lymphocytic leukemia of B-cell type
- C91.3Prolymphocytic leukemia of B-cell type
- C91.4Hairy cell leukemia
- C91.6Prolymphocytic leukemia of T-cell type
- C91.AMature B-cell leukemia Burkitt-type
- C91.ZOther lymphoid leukemia
- C91.9Lymphoid leukemia, unspecified
Questions about C91.5
- Is C91.5 a billable ICD-10-CM code?
- No. C91.5 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does C91.5 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).