Plasma cell leukemia in remission

This code signifies a diagnosis of plasma cell leukemia (PCL) that is currently in a state of remission. PCL is an aggressive and rare form of multiple myeloma characterized by a high percentage of circulating plasma cells in the peripheral blood. Remission indicates a significant reduction or absence of disease activity following treatment.

This code is appropriate when a patient with a documented history of plasma cell leukemia is currently undergoing follow-up and clinical or laboratory findings confirm the disease is in remission. Documentation should clearly state "plasma cell leukemia in remission" or similar terminology, supported by pathology reports, bone marrow biopsies, and peripheral blood counts indicating no active disease.

• Always sequence this code after any active treatment codes if the patient is still receiving maintenance therapy.
• Do not use this code if the patient has active plasma cell leukemia; instead, use the appropriate code for active disease.
• Distinguish carefully from multiple myeloma in remission (C90.01); PCL is a distinct, more aggressive variant.