ICD-10-CM · Chapter 2 · C00-D49
C91 Lymphoid leukemia
Excludes 1 (cannot be coded together)
- personal history of leukemia (Z85.6)
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
|---|---|---|
| C91..0 | Acute lymphoblastic leukemia [ALL] | No |
| C91..00 | Acute lymphoblastic leukemia not having achieved remission | Yes |
| C91..01 | Acute lymphoblastic leukemia, in remission | Yes |
| C91..02 | Acute lymphoblastic leukemia, in relapse | Yes |
| C91..1 | Chronic lymphocytic leukemia of B-cell type | No |
| C91..10 | Chronic lymphocytic leukemia of B-cell type not having achieved remission | Yes |
| C91..11 | Chronic lymphocytic leukemia of B-cell type in remission | Yes |
| C91..12 | Chronic lymphocytic leukemia of B-cell type in relapse | Yes |
| C91..3 | Prolymphocytic leukemia of B-cell type | No |
| C91..30 | Prolymphocytic leukemia of B-cell type not having achieved remission | Yes |
| C91..31 | Prolymphocytic leukemia of B-cell type, in remission | Yes |
| C91..32 | Prolymphocytic leukemia of B-cell type, in relapse | Yes |
| C91..4 | Hairy cell leukemia | No |
| C91..40 | Hairy cell leukemia not having achieved remission | Yes |
| C91..41 | Hairy cell leukemia, in remission | Yes |
| C91..42 | Hairy cell leukemia, in relapse | Yes |
| C91..5 | Adult T-cell lymphoma/leukemia (HTLV-1-associated) | No |
| C91..50 | Adult T-cell lymphoma/leukemia (HTLV-1-associated) not having achieved remission | Yes |
| C91..51 | Adult T-cell lymphoma/leukemia (HTLV-1-associated), in remission | Yes |
| C91..52 | Adult T-cell lymphoma/leukemia (HTLV-1-associated), in relapse | Yes |
| C91..6 | Prolymphocytic leukemia of T-cell type | No |
| C91..60 | Prolymphocytic leukemia of T-cell type not having achieved remission | Yes |
| C91..61 | Prolymphocytic leukemia of T-cell type, in remission | Yes |
| C91..62 | Prolymphocytic leukemia of T-cell type, in relapse | Yes |
| C91..A | Mature B-cell leukemia Burkitt-type | No |
| C91..A0 | Mature B-cell leukemia Burkitt-type not having achieved remission | Yes |
| C91..A1 | Mature B-cell leukemia Burkitt-type, in remission | Yes |
| C91..A2 | Mature B-cell leukemia Burkitt-type, in relapse | Yes |
| C91..Z | Other lymphoid leukemia | No |
| C91..Z0 | Other lymphoid leukemia not having achieved remission | Yes |
| C91..Z1 | Other lymphoid leukemia, in remission | Yes |
| C91..Z2 | Other lymphoid leukemia, in relapse | Yes |
| C91..9 | Lymphoid leukemia, unspecified | No |
| C91..90 | Lymphoid leukemia, unspecified not having achieved remission | Yes |
| C91..91 | Lymphoid leukemia, unspecified, in remission | Yes |
| C91..92 | Lymphoid leukemia, unspecified, in relapse | Yes |
Plain-language term for this code
The following entry in the US Medical Glossary corresponds to ICD-10-CM category C91:
- Leukemia — Leucemia
Last reviewed: September 2026