C90

ICD-10Non-billable category

Multiple myeloma and malignant plasma cell neoplasms

Official ICD-10-CM descriptor (FY2026)

Multiple myeloma and malignant plasma cell neoplasms

C90 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79)

More specific codes under C90

Where this code sits

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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