ICD-10-CM 2027
ICD-10 code for plasmacytoma
From the official ICD-10-CM alphabetic index entry “Plasmacytoma”. Page updated September 29, 2026.
About coding plasmacytoma
The ICD-10-CM code for plasmacytoma is C90.3 (Solitary plasmacytoma). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on C90.3.
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.
More specific plasmacytoma codes (official index)
Common questions about plasmacytoma ICD-10 codes
What is the ICD-10 code for plasmacytoma?
- C90.3 — Solitary plasmacytoma (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: C90.2, C90.0, C90.3.
What is the ICD-10 code for extramedullary plasmacytoma?
- C90.2 — Extramedullary plasmacytoma (header code; choose a more specific subcode).
What is the ICD-10 code for medullary plasmacytoma?
- C90.0 — Multiple myeloma (header code; choose a more specific subcode).
What is the ICD-10 code for solitary plasmacytoma?
- C90.3 — Solitary plasmacytoma (header code; choose a more specific subcode).
Is C90.3 billable?
- No. C90.3 is a header code. Report one of its more specific subcodes instead.