| C91 | Lymphoid leukemia | NON-BILLABLE CODE |
| C91.0 | Acute lymphoblastic leukemia [ALL] | NON-BILLABLE CODE |
| C91.00 | Acute lymphoblastic leukemia not having achieved remission | BILLABLE CODE |
| C91.01 | Acute lymphoblastic leukemia, in remission | BILLABLE CODE |
| C91.02 | Acute lymphoblastic leukemia, in relapse | BILLABLE CODE |
| C91.1 | Chronic lymphocytic leukemia of B-cell type | NON-BILLABLE CODE |
| C91.10 | Chronic lymphocytic leukemia of B-cell type not having achieved remission | BILLABLE CODE |
| C91.11 | Chronic lymphocytic leukemia of B-cell type in remission | BILLABLE CODE |
| C91.12 | Chronic lymphocytic leukemia of B-cell type in relapse | BILLABLE CODE |
| C91.3 | Prolymphocytic leukemia of B-cell type | NON-BILLABLE CODE |
| C91.30 | Prolymphocytic leukemia of B-cell type not having achieved remission | BILLABLE CODE |
| C91.31 | Prolymphocytic leukemia of B-cell type, in remission | BILLABLE CODE |
| C91.32 | Prolymphocytic leukemia of B-cell type, in relapse | BILLABLE CODE |
| C91.4 | Hairy cell leukemia | NON-BILLABLE CODE |
| C91.40 | Hairy cell leukemia not having achieved remission | BILLABLE CODE |
| C91.41 | Hairy cell leukemia, in remission | BILLABLE CODE |
| C91.42 | Hairy cell leukemia, in relapse | BILLABLE CODE |
| C91.5 | Adult T-cell lymphoma/leukemia (HTLV-1-associated) | NON-BILLABLE CODE |
| C91.50 | Adult T-cell lymphoma/leukemia (HTLV-1-associated) not having achieved remission | BILLABLE CODE |
| C91.51 | Adult T-cell lymphoma/leukemia (HTLV-1-associated), in remission | BILLABLE CODE |
| C91.52 | Adult T-cell lymphoma/leukemia (HTLV-1-associated), in relapse | BILLABLE CODE |
| C91.6 | Prolymphocytic leukemia of T-cell type | NON-BILLABLE CODE |
| C91.60 | Prolymphocytic leukemia of T-cell type not having achieved remission | BILLABLE CODE |
| C91.61 | Prolymphocytic leukemia of T-cell type, in remission | BILLABLE CODE |
| C91.62 | Prolymphocytic leukemia of T-cell type, in relapse | BILLABLE CODE |
| C91.9 | Lymphoid leukemia, unspecified | NON-BILLABLE CODE |
| C91.91 | Lymphoid leukemia, unspecified, in remission | BILLABLE CODE |
| C91.92 | Lymphoid leukemia, unspecified, in relapse | BILLABLE CODE |
| C91.A | Mature B-cell leukemia Burkitt-type | NON-BILLABLE CODE |
| C91.A0 | Mature B-cell leukemia Burkitt-type not having achieved remission | BILLABLE CODE |
| C91.A1 | Mature B-cell leukemia Burkitt-type, in remission | BILLABLE CODE |
| C91.A2 | Mature B-cell leukemia Burkitt-type, in relapse | BILLABLE CODE |
| C91.Z | Other lymphoid leukemia | NON-BILLABLE CODE |
| C91.Z0 | Other lymphoid leukemia not having achieved remission | BILLABLE CODE |
| C91.Z1 | Other lymphoid leukemia, in remission | BILLABLE CODE |
| C91.Z2 | Other lymphoid leukemia, in relapse | BILLABLE CODE |
