C84.Z8

HCC Category Mapping

What This Code Means

A type of cancer affecting T-cells or NK-cells (immune system cells) that has spread to lymph nodes in multiple locations throughout the body.

Coding Tips

• •Use this code when the lymphoma involves multiple lymph node regions and the specific T/NK-cell subtype doesn't fit other C84 categories
• •Verify documentation specifies multiple sites involvement; if single site, use more specific anatomical code

Clinical Significance

Other mature T/NK-cell lymphoma involving multiple lymph node sites reflects widespread dissemination and typically advanced stage disease. Multi-site involvement is common in aggressive subtypes like angioimmunoblastic T-cell lymphoma, which presents with generalized lymphadenopathy. Capturing multi-site involvement accurately supports appropriate risk stratification and treatment intensity.

Documentation Requirements

• ✓Pathology confirmation of mature T-cell or NK-cell lineage via immunophenotyping (CD3+, CD4/CD8, CD56 for NK-cell)
• ✓Imaging or clinical documentation confirming involvement of lymph nodes of multiple sites
• ✓Specific subtype identification when possible (angioimmunoblastic, hepatosplenic, extranodal NK/T-cell, etc.)
• ✓Ann Arbor staging and whether B-symptoms (fever, night sweats, weight loss) are present

Commonly Confused Codes