C84.Z5
Other mature T/NK-cell lymphomas, lymph nodes of inguinal region and lower limb
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 9 never code together
C84.Zcode
Excludes1
- angioimmunoblastic T-cell lymphoma (C86.50)C86.50
- blastic NK-cell lymphoma (C86.40)C86.40
- enteropathy-type T-cell lymphoma (C86.20)C86.20
- extranodal NK-cell lymphoma, nasal type (C86.00)C86.00
- hepatosplenic T-cell lymphoma (C86.10)C86.10
- primary cutaneous CD30-positive T-cell proliferations (C86.60)C86.60
- subcutaneous panniculitis-like T-cell lymphoma (C86.30)C86.30
- T-cell leukemia (C91.1-)C91.1-
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Instructional notes 9
C84.Zcode
Notes
- If T-cell lineage or involvement is mentioned in conjunction with a specific lymphoma, code to the more specific description.
C00-D49chapter
Notes
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).C25.9
Index entries leading here 1
Alongside this code 10 same parent — C84.Z
C84.Z0 Other mature T/NK-cell lymphomas, unspecified site C84.Z1 Oth mature T/NK-cell lymph, nodes of head, face, and neck C84.Z2 Other mature T/NK-cell lymphomas, intrathoracic lymph nodes C84.Z3 Oth mature T/NK-cell lymphomas, intra-abdominal lymph nodes C84.Z4 Oth mature T/NK-cell lymph, nodes of axilla and upper limb C84.Z6 Other mature T/NK-cell lymphomas, intrapelvic lymph nodes C84.Z7 Other mature T/NK-cell lymphomas, spleen C84.Z8 Oth mature T/NK-cell lymphomas, lymph nodes mult site C84.Z9 Oth mature T/NK-cell lymph, extrnod and solid organ sites C84.ZA Other mature T/NK-cell lymphomas, in remission
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.