C84.73
BillableAnaplastic large cell lymphoma, ALK-negative, intra-abdominal lymph nodes
HCC Category Mapping
V28HCC 19 — Lymphoma and Other Cancers
0.105V24HCC 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 type of aggressive lymphoma (cancer of immune cells) without a specific genetic marker (ALK-negative) that is located in the lymph nodes within the abdominal cavity.
Coding Tips
- •Verify specific abdominal lymph node involvement (mesenteric, retroperitoneal, etc.) through imaging or pathology reports
- •Distinguish from splenic involvement, which has a separate code (C84.77)
Clinical Significance
Anaplastic large cell lymphoma, ALK-negative, involving intra-abdominal lymph nodes indicates aggressive T-cell lymphoma without the ALK marker affecting abdominal nodal basins. Abdominal ALCL may present with nonspecific symptoms such as pain, bloating, or weight loss. The worse prognosis of ALK-negative disease necessitates aggressive multiagent chemotherapy.
Documentation Requirements
- ✓Pathology confirming ALCL with ALK-negative status
- ✓Abdominal imaging documenting specific lymph node groups involved
- ✓CD30 positivity and T-cell markers on immunohistochemistry
- ✓Distinction from hepatosplenic T-cell lymphoma and enteropathy-associated T-cell lymphoma
- ✓Clinical staging documentation
Commonly Confused Codes
C84.63 — ALCL ALK-positive, intra-abdominal: Different ALK statusC84.43 — PTCL-NOS, intra-abdominal: Different subtypeC84.76 — ALCL ALK-negative, intrapelvic: Pelvic nodes are below pelvic brim; distinguish from abdominalC84.77 — ALCL ALK-negative, spleen: Spleen has its own code; not an abdominal lymph node
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.7Anaplastic large cell lymphoma, ALK-negative└C84.73Anaplastic large cell lymphoma, ALK-negative, intra-abdominal lymph nodes
└C84.73Anaplastic large cell lymphoma, ALK-negative, intra-abdominal lymph nodes