C90 Multiple myeloma and malignant plasma cell neoplasms

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Multiple myeloma and malignant plasma cell neoplasms is C90 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
C81-C96: Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
Category C90
17 codes (12 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with C90.
  • personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79)

Official Coding Guidelines

Remission vs personal history codes for leukemia/C90

n. Leukemia, Multiple Myeloma, and Malignant Plasma Cell Neoplasms in remission versus personal history The categories for leukemia, and category C90, Multiple myeloma and malignant plasma cell neoplasms, have codes indicating whether or not the leukemia has achieved remission. There are also codes Z85.6, Personal history of leukemia, and Z85.79, Personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.n
Tx of primary site (TOC entry)

a. Admission/Encounter for treatment of primary site ............................................................. 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.a

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

C90.0 Multiple myeloma C90.00 Multiple myeloma not having achieved remission C90.01 Multiple myeloma in remission C90.02 Multiple myeloma in relapse C90.1 Plasma cell leukemia C90.10 Plasma cell leukemia not having achieved remission C90.11 Plasma cell leukemia in remission C90.12 Plasma cell leukemia in relapse C90.2 Extramedullary plasmacytoma C90.20 Extramedullary plasmacytoma not having achieved remission C90.21 Extramedullary plasmacytoma in remission C90.22 Extramedullary plasmacytoma in relapse C90.3 Solitary plasmacytoma C90.30 Solitary plasmacytoma not having achieved remission C90.31 Solitary plasmacytoma in remission C90.32 Solitary plasmacytoma in relapse

Related Codes in C90

C90.0 Multiple myeloma C90.00 Multiple myeloma not having achieved remission C90.01 Multiple myeloma in remission C90.02 Multiple myeloma in relapse C90.1 Plasma cell leukemia C90.10 Plasma cell leukemia not having achieved remission C90.11 Plasma cell leukemia in remission C90.12 Plasma cell leukemia in relapse C90.2 Extramedullary plasmacytoma C90.20 Extramedullary plasmacytoma not having achieved remission C90.21 Extramedullary plasmacytoma in remission C90.22 Extramedullary plasmacytoma in relapse C90.3 Solitary plasmacytoma C90.30 Solitary plasmacytoma not having achieved remission C90.31 Solitary plasmacytoma in remission C90.32 Solitary plasmacytoma in relapse
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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