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C84.Z

Non-billable

Other mature T/NK-cell lymphomas

C84.Z is the ICD-10-CM code for Other mature T/NK-cell lymphomas. It is a non-billable category code — use a more specific child code such as C84.Z0 for billing.

Status
Header (non-billable)
Chapter
C00-D49
Parent
C84
Subcodes
11
Edition
FY2026

C00-D49 Neoplasms

Excludes1 — not coded here

  • •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.

Frequently asked questions

What is ICD-10 code C84.Z?
C84.Z is the ICD-10-CM code for "Other mature T/NK-cell lymphomas". It falls under C00-D49 Neoplasms.
Is C84.Z a billable code?
No — C84.Z is a non-billable header code. Use a more specific child code (such as C84.Z0) for billing.
What are the subcodes of C84.Z?
C84.Z has 11 more specific child codes, including C84.Z0, C84.Z1, C84.Z2.
What is excluded from C84.Z?
Excludes1 (not coded here): 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).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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