C84.98
BillableMature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sites
HCC Category Mapping
V28HCC 20 — Lung and Other Severe Cancers
0.000V24HCC 10 — Lymphoma and Other Cancers
0.675ESRDHCC 10 — Lymphoma and Other Cancers
0.000RxHCCHCC 21 — Hodgkin Lymphoma and Other Cancers
0.000What This Code Means
A mature T-cell or natural killer cell lymphoma affecting lymph nodes in multiple different areas of the body.
Coding Tips
- •Use this code when lymph node involvement is documented in two or more distinct anatomical regions
- •Document all involved sites in the clinical record for treatment planning purposes
Clinical Significance
Mature T/NK-cell lymphomas, unspecified, involving lymph nodes of multiple sites indicates widespread nodal disease from an unclassified T/NK-cell lymphoma. Multi-site involvement typically reflects advanced disease. The unspecified subtype should prompt additional diagnostic efforts because different T-cell lymphoma subtypes have markedly different treatment approaches and outcomes.
Documentation Requirements
- ✓Pathology confirming mature T-cell or NK-cell lymphoma
- ✓Imaging documenting involvement of two or more distinct lymph node regions
- ✓All involved regions documented
- ✓Immunophenotyping results
- ✓Clinical staging (expected Ann Arbor III-IV)
- ✓Documentation of attempts at further subtype classification
Commonly Confused Codes
C84.91-C84.97 — Site-specific unspecified T/NK-cell lymphoma codes: For single-region involvement onlyC84.90 — Mature T/NK-cell lymphoma, unspecified site: Use C84.90 when site is unknown; C84.98 when multiple sites are documentedC84.48 — PTCL-NOS, multiple sites: More specific subtypeC84.99 — Mature T/NK-cell lymphoma, extranodal: For organ involvement, not multiple lymph node sites
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.9Mature T/NK-cell lymphomas, unspecified└C84.98Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sites
└C84.98Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sites