Alphabetic Index FY2027

D47.2

Monoclonal gammopathy

FY2027Chapter 2: Neoplasms/D37–D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes

BillableComplete code, valid to report
Care settingsHome Health Primary · MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases

D47.2 (also written D472) is a billable ICD-10-CM diagnosis code for monoclonal gammopathy. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 11 codes in category D47 (Other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue). The Alphabetic Index lists it under 8 entries. Its coding notes include 1 Excludes1 entry.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Also from chapter/block level (1 note)
Inherited from D37–D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
  • neoplasms of unspecified behavior (D49.-)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Inclusion terms

Conditions classified to this code.

This code
  • Monoclonal gammopathy of undetermined significance [MGUS]

Notes

Also from chapter/block level (9 notes)
Inherited from D37–D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
  • Categories D37-D44, and D48 classify by site neoplasms of uncertain behavior, i.e., histologic confirmation whether the neoplasm is malignant or benign cannot be made.
Inherited from Chapter 2 Neoplasms
  • Functional activity
  • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Morphology [Histology]
  • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Primary malignant neoplasms overlapping site boundaries
  • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Malignant neoplasm of ectopic tissue
  • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 8 entries