C84.Z

ICD-10Non-billable category

Other mature T/NK-cell lymphomas

Official ICD-10-CM descriptor (FY2026)

Other mature T/NK-cell lymphomas

C84.Z 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.

  • angioimmunoblastic T-cell lymphoma (C86.50)
  • blastic NK-cell lymphoma (C86.40)
  • enteropathy-type T-cell lymphoma (C86.20)
  • extranodal NK-cell lymphoma, nasal type (C86.00)
  • hepatosplenic T-cell lymphoma (C86.10)
  • primary cutaneous CD30-positive T-cell proliferations (C86.60)
  • subcutaneous panniculitis-like T-cell lymphoma (C86.30)
  • T-cell leukemia (C91.1-)

Notes

  • If T-cell lineage or involvement is mentioned in conjunction with a specific lymphoma, code to the more specific description.

ICD-10-CM FY2026 defines 11 codes beneath C84.Z. See the ICD-10-CM index for what this site publishes.

Related codes in C84

Where this code sits

Parent code
C84

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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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