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ICD-10-CM 2027

ICD-10 code for Solitary plasmacytoma

C90.3

Solitary plasmacytoma

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Plasmacytoma › solitary”. Page updated September 29, 2026.

About coding Solitary plasmacytoma

The ICD-10-CM code for Solitary plasmacytoma is C90.3 (Solitary plasmacytoma).

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.

Common questions about Solitary plasmacytoma ICD-10 codes

What is the ICD-10 code for Solitary plasmacytoma?

C90.3 — Solitary plasmacytoma (a header code; report a more specific subcode).

Is C90.3 billable?

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