ICD-10-CM 2027
ICD-10 code for gammopathy
From the official ICD-10-CM alphabetic index entry “Gammopathy (of undetermined significance [MGUS])”. Page updated September 29, 2026.
About coding gammopathy
The ICD-10-CM code for gammopathy is D47.2 (Monoclonal gammopathy). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on D47.2.
Within D47 (other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue), D47.2 is specifically for monoclonal gammopathy. Related codes cover mast cell neoplasms of uncertain behavior (D47.0), chronic myeloproliferative disease (D47.1), essential (hemorrhagic) thrombocythemia (D47.3), Osteomyelofibrosis (D47.4), neoplasm of uncertain behavior of lymphoid, hematopoietic and related tissue, unspecified (D47.9) and other specified neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue (D47.Z).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 814 (Reticuloendothelial and Immunity Disorders with MCC, relative weight 2.0729), DRG 815 (Reticuloendothelial and Immunity Disorders with CC, relative weight 1.0444) and DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC, relative weight 0.7381), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific gammopathy codes (official index)
Common questions about gammopathy ICD-10 codes
What is the ICD-10 code for gammopathy?
- D47.2 — Monoclonal gammopathy. More specific codes apply when the documentation supports them: D47.2, D47.2, D89.0.
What is the ICD-10 code for associated with lymphoplasmacytic dyscrasia gammopathy?
- D47.2 — Monoclonal gammopathy.
What is the ICD-10 code for monoclonal gammopathy?
- D47.2 — Monoclonal gammopathy.
What is the ICD-10 code for polyclonal gammopathy?
- D89.0 — Polyclonal hypergammaglobulinemia.
Is D47.2 billable?
- Yes. D47.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D47.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D47.2 as a principal diagnosis.
Is D47.2 a CC or MCC?
- No. D47.2 is neither a CC nor an MCC under MS-DRG v44.0.