C90 Multiple myeloma and malignant plasma cell neoplasms

Category / Non-billable header 16 subcodes

Block: Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)

Excludes 1 (cannot be coded together)

  • personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79)

Subcodes

Each subcode links to a detail page with full clinical annotations.

Code Description Billable
C90..0 Multiple myeloma No
C90..00 Multiple myeloma not having achieved remission Yes
C90..01 Multiple myeloma in remission Yes
C90..02 Multiple myeloma in relapse Yes
C90..1 Plasma cell leukemia No
C90..10 Plasma cell leukemia not having achieved remission Yes
C90..11 Plasma cell leukemia in remission Yes
C90..12 Plasma cell leukemia in relapse Yes
C90..2 Extramedullary plasmacytoma No
C90..20 Extramedullary plasmacytoma not having achieved remission Yes
C90..21 Extramedullary plasmacytoma in remission Yes
C90..22 Extramedullary plasmacytoma in relapse Yes
C90..3 Solitary plasmacytoma No
C90..30 Solitary plasmacytoma not having achieved remission Yes
C90..31 Solitary plasmacytoma in remission Yes
C90..32 Solitary plasmacytoma in relapse Yes

Last reviewed: September 2026