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ICD-10-CM 2027

ICD-10 code for Myelomatosis

C90.0

Multiple myeloma

Header — needs a more specific code

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

About coding Myelomatosis

The ICD-10-CM code for Myelomatosis is C90.0 (Multiple myeloma).

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

To report this condition, pick the subcode that matches the documentation: C90.00 (not having achieved remission), C90.01 (in remission) and C90.02 (in relapse).

Don't report C90.0 together with the conditions in its Excludes1 note: solitary myeloma (C90.3-) and solitary plasmactyoma (C90.3-).

Don't confuse with (Excludes1 for C90.0)

Common questions about Myelomatosis ICD-10 codes

What is the ICD-10 code for Myelomatosis?

C90.0 — Multiple myeloma (a header code; report a more specific subcode).

Is C90.0 billable?

No. C90.0 is a header code. Report one of its more specific subcodes instead.