Extramedullary plasmacytoma in remission

This code signifies a malignant plasma cell tumor that originates outside the bone marrow, specifically when the disease is no longer active and shows no signs of progression or recurrence. It indicates a state of complete or partial remission following treatment for extramedullary plasmacytoma.

Use this code when documentation confirms a previous diagnosis of extramedullary plasmacytoma and current clinical assessment indicates the disease is in remission. This typically follows successful treatment such as radiation therapy, chemotherapy, or surgical excision, with no evidence of active disease.

• Ensure documentation explicitly states "remission" for extramedullary plasmacytoma; "history of" alone is insufficient.
• Do not confuse with codes for active extramedullary plasmacytoma (C90.20) or multiple myeloma in remission (C90.01).
• Sequence this code as a secondary diagnosis if the patient is being seen for complications related to the previous treatment or for routine follow-up.