Other lymphoid leukemia not having achieved remission

This code signifies a diagnosis of lymphoid leukemia that does not fit into more specific categories (e.g., acute, chronic, B-cell, T-cell) and has not yet responded to treatment to the point of remission. It indicates an active, unspecified form of lymphoid leukemia.

Apply this code when documentation confirms a diagnosis of lymphoid leukemia, but the specific type (e.g., acute, chronic) is not specified, or the cell lineage (B-cell, T-cell) is not definitively identified, and the patient is not in remission. This code is appropriate for initial diagnoses or follow-up encounters where remission has not been achieved.

• Ensure documentation explicitly states "not having achieved remission" or similar language indicating active disease.
• Avoid using this code if a more specific type of lymphoid leukemia (e.g., C91.00 for acute, C91.10 for chronic) is documented.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, unless another condition is clearly driving the encounter and treatment.