Leukemia, unspecified, in relapse

This code signifies a diagnosis of leukemia where the specific type (e.g., acute, chronic, myeloid, lymphoid) has not been documented, and the disease has recurred after a period of remission. It indicates a return of malignant cells requiring further treatment.

Apply this code when the physician's documentation clearly states "leukemia, unspecified, in relapse" or similar phrasing without further specification of the leukemia type. Supporting documentation would include pathology reports confirming leukemia and clinical notes indicating a recurrence after a previous remission.

• Do not use this code if the type of leukemia is specified (e.g., acute myeloid leukemia).
• Ensure documentation explicitly states "in relapse" or "recurrent disease" for this code to be appropriate.
• Sequence this code as the primary diagnosis if it is the reason for the encounter, followed by codes for any associated complications.