Monocytic leukemia, unspecified in relapse

This code signifies a malignant neoplasm of the blood-forming tissues characterized by an uncontrolled proliferation of monocytic cells, where the specific type of monocytic leukemia is not documented. The "in relapse" designation indicates that the disease, after a period of remission, has recurred.

Apply this code when documentation clearly states a diagnosis of monocytic leukemia without further specification of its subtype (e.g., acute, chronic) and explicitly notes that the patient is experiencing a relapse of the condition. This is appropriate for patients undergoing treatment for recurrent monocytic leukemia of an unspecified type.

• Ensure documentation explicitly states "in relapse" for accurate code assignment.
• Do not use this code if a more specific type of monocytic leukemia (e.g., acute monocytic leukemia) is documented; instead, refer to the appropriate subcategory.
• Sequence this code as the primary diagnosis when the relapse of unspecified monocytic leukemia is the reason for the encounter.