This neoplasm is not reportable.
ICD-O-2 Morphology
Effective 1992 - 2000
ICD-O-3 Morphology
Effective 2001 and later
Not Reportable
This neoplasm is not reportable
Primary Site(s)
See Abstractor Notes
Alternate Names
Benign monoclonal gammopathy
Idiopathic paraproteinemia
Monoclonal gammopathy of undetermined significance
Monoclonal gammopathy, NOS
Monoclonal gammopathy, unassociated
Monoclonal gammopathy, unattributed
Non-myelomatous gammopathy
MGUS is defined as the presence in the serum of an M-protein < 30 g/L, bone marrow clonal plasma cells < 10%, no end organ damage, and no evidence of B-cell lymphoma or other disease known to produce an M-protein. MGUS is considered a pre-neoplastic condition.

See also Plasma cell dyscrasia.
Definitive Diagnostic Methods
This data item does not apply
Genetics Data
This data item does not apply
This data item does not apply
Corresponding ICD-9 Codes
273.1 Monoclonal paraproteinemia
Corresponding ICD-10 Codes
D47.2 Monoclonal gammopathy
Corresponding ICD-10-CM Codes (U.S. only)
D47.2 Monoclonal gammopathy (effective October 01, 2015)