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ICD-10-CM 2027 diagnosis code

C90.3Solitary plasmacytoma

Not billable — use a more specific code

C90.3 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Looking up by condition? See ICD-10 code for Plasmacytoma.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About C90.3

C90.3 is the ICD-10-CM diagnosis code for Solitary plasmacytoma. It belongs to category C90 (multiple myeloma and malignant plasma cell neoplasms), block C81-C96 (malignant neoplasms of lymphoid, hematopoietic and related tissue) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within C90 (multiple myeloma and malignant plasma cell neoplasms), C90.3 is specifically for Solitary plasmacytoma. Related codes cover multiple myeloma (C90.0), plasma cell leukemia (C90.1) and Extramedullary plasmacytoma (C90.2).

To report this condition, pick the subcode that matches the documentation: C90.30 (not having achieved remission), C90.31 (in remission) and C90.32 (in relapse).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under C90.3

Coding notes

Applicable toConditions and synonyms classified to this code
  • Localized malignant plasma cell tumor NOS
  • Plasmacytoma NOS
  • Solitary myeloma

Notes that apply from higher levels

Instructions written at a parent level also apply to C90.3.

› From C90 Multiple myeloma and malignant plasma cell neoplasms
Excludes1
  • personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79)

Broader instructions also apply from C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue and Chapter 2: Neoplasms.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to C90.3.

Codes whose notes reference C90.3

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about C90.3

Is C90.3 billable?

No. C90.3 is a header code. Report one of its more specific subcodes instead.