Multiple myeloma not having achieved remission

This code signifies a malignant plasma cell neoplasm characterized by the proliferation of abnormal plasma cells in the bone marrow, which has not yet responded to treatment sufficiently to be considered in remission. It indicates active disease requiring ongoing management or initial treatment.

Apply this code for patients diagnosed with multiple myeloma who are either newly diagnosed, undergoing initial treatment, or whose disease has not achieved a state of complete or partial remission following therapy. Documentation should clearly state "multiple myeloma" and explicitly or implicitly indicate the absence of remission (e.g., "active disease," "not in remission," "initial diagnosis").

• Do not use this code if the patient's multiple myeloma is documented as being in remission; instead, select a code from C90.01.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless a complication of the multiple myeloma is the primary reason.
• Ensure documentation specifies "multiple myeloma" and not other plasma cell dyscrasias, as these have distinct codes.