C84.95
BillableMature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb
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 the lymph nodes in the groin and lower leg areas.
Coding Tips
- •Confirm inguinal and lower limb lymph node involvement through examination or imaging documentation
- •Note whether involvement is in one or both lower extremities
Clinical Significance
Mature T/NK-cell lymphomas, unspecified, involving inguinal and lower limb lymph nodes captures unclassified T/NK-cell lymphoma with groin and lower extremity nodal disease. Inguinal lymphadenopathy has a broad differential including infections, metastatic disease, and various lymphoma subtypes. Specific pathologic subtyping should be pursued for optimal treatment.
Documentation Requirements
- ✓Pathology confirming mature T-cell or NK-cell lymphoma lineage
- ✓Physical exam or imaging documenting inguinal/lower limb lymph node involvement
- ✓Immunophenotyping results
- ✓Documentation of diagnostic classification attempts
- ✓Clinical staging
Commonly Confused Codes
C84.45 — PTCL-NOS, inguinal/lower limb: More specific subtypeC84.65/C84.75 — ALCL ALK-positive/negative, inguinal/lower limb: If ALCL confirmedC84.96 — Mature T/NK-cell lymphoma, unspecified, intrapelvic: Different anatomical locationC84.A5 — Cutaneous T-cell lymphoma, inguinal/lower limb: Skin-primary T-cell lymphoma
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.9Mature T/NK-cell lymphomas, unspecified└C84.95Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb
└C84.95Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb