All ICD10 Codes

C84.9

Non-Billable
ChapterC00–D49
Ranksubcategory
Official Description

Mature T/NK-cell lymphomas, unspecified

Use a more specific code (11 billable)
C84.90Mature T/NK-cell lymphomas, unspecified, unspecified siteC84.91Mature T/NK-cell lymphomas, unspecified, lymph nodes of head, face, and neckC84.92Mature T/NK-cell lymphomas, unspecified, intrathoracic lymph nodesC84.93Mature T/NK-cell lymphomas, unspecified, intra-abdominal lymph nodesC84.94Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limbC84.95Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limbC84.96Mature T/NK-cell lymphomas, unspecified, intrapelvic lymph nodesC84.97Mature T/NK-cell lymphomas, unspecified, spleenC84.98Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sitesC84.99Mature T/NK-cell lymphomas, unspecified, extranodal and solid organ sitesC84.9AMature T/NK-cell lymphomas, unspecified, in remission
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 2: Neoplasms (C00-D49).

Instructional Notes

Includes
  • NK/T cell lymphoma NOS
Excludes1(Not coded here. Use a different code.)
  • mature T-cell lymphoma, not elsewhere classified (C84.4-)
General instructions are available for the parent sections:
View C81-C96 NotesView C84 Notes

Clinical Hierarchy

BillableHas subcodes
CH2Neoplasms (C00-D49)
C81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
C84Mature T/NK-cell lymphomas
C84.9Mature T/NK-cell lymphomas, unspecifiedNot billable
C84.90Mature T/NK-cell lymphomas, unspecified, unspecified siteBillable
C84.91Mature T/NK-cell lymphomas, unspecified, lymph nodes of head, face, and neckBillable
C84.92Mature T/NK-cell lymphomas, unspecified, intrathoracic lymph nodesBillable
C84.93Mature T/NK-cell lymphomas, unspecified, intra-abdominal lymph nodesBillable
C84.94Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limbBillable
C84.95Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limbBillable
C84.96Mature T/NK-cell lymphomas, unspecified, intrapelvic lymph nodesBillable
C84.97Mature T/NK-cell lymphomas, unspecified, spleenBillable
C84.98Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sitesBillable
C84.99Mature T/NK-cell lymphomas, unspecified, extranodal and solid organ sitesBillable
C84.9AMature T/NK-cell lymphomas, unspecified, in remissionBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to C84.9:

categoryC84
Mature T/NK-cell lymphomas
View context instructions
blockC81-C96
Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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