ICD-10-CM > C00-D49 > C81-C96 > C90 C90 Multiple myeloma and malignant plasma cell neoplasms Non-Billable/Non-Specific Type 1 Excludes personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79) Codes C90.0Multiple myelomaC90.00Multiple myeloma not having achieved remissionC90.01Multiple myeloma in remissionC90.02Multiple myeloma in relapseC90.1Plasma cell leukemiaC90.10Plasma cell leukemia not having achieved remissionC90.11Plasma cell leukemia in remissionC90.12Plasma cell leukemia in relapseC90.2Extramedullary plasmacytomaC90.20Extramedullary plasmacytoma not having achieved remissionC90.21Extramedullary plasmacytoma in remissionC90.22Extramedullary plasmacytoma in relapseC90.3Solitary plasmacytomaC90.30Solitary plasmacytoma not having achieved remissionC90.31Solitary plasmacytoma in remissionC90.32Solitary plasmacytoma in relapse