C84.A3
BillableCutaneous T-cell lymphoma, unspecified, intra-abdominal lymph nodes
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 cancer of T cells that primarily affects the skin with involvement of lymph nodes in the abdominal cavity.
Coding Tips
- •Intra-abdominal lymph nodes include mesenteric, retroperitoneal, and other abdominal nodes
- •Confirm abdominal lymph node involvement is documented before assigning this code
Clinical Significance
Cutaneous T-cell lymphoma, unspecified, involving intra-abdominal lymph nodes represents advanced cutaneous T-cell lymphoma with abdominal nodal spread. Intra-abdominal involvement indicates significant systemic progression requiring systemic therapy. This level of nodal involvement is uncommon in early-stage cutaneous T-cell lymphoma and suggests transformed or advanced disease.
Documentation Requirements
- ✓Skin biopsy confirming cutaneous T-cell lymphoma
- ✓Abdominal imaging documenting intra-abdominal lymph node involvement
- ✓Pathologic or radiologic confirmation of lymphomatous nodal involvement
- ✓Updated TNMB staging
- ✓Assessment for large cell transformation
Commonly Confused Codes
C84.03 — Mycosis fungoides, intra-abdominal lymph nodes: If mycosis fungoides specifically diagnosedC84.93 — Mature T/NK-cell lymphoma, unspecified, intra-abdominal: General T/NK lymphoma without cutaneous primaryC84.43 — PTCL-NOS, intra-abdominal: Primary nodal T-cell lymphomaC84.A6 — Cutaneous T-cell lymphoma, intrapelvic: Different anatomical region
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.ACutaneous T-cell lymphoma, unspecified└C84.A3Cutaneous T-cell lymphoma, unspecified, intra-abdominal lymph nodes
└C84.A3Cutaneous T-cell lymphoma, unspecified, intra-abdominal lymph nodes