C84.76
BillableAnaplastic large cell lymphoma, ALK-negative, intrapelvic 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 pelvis.
Coding Tips
- •Verify intrapelvic lymph node involvement through imaging studies (CT or MRI) documented in the medical record
- •Distinguish from intra-abdominal involvement (C84.73) by confirming pelvic-specific location
Clinical Significance
Anaplastic large cell lymphoma, ALK-negative, involving intrapelvic lymph nodes represents deep pelvic nodal disease from aggressive T-cell lymphoma without the ALK marker. Intrapelvic nodes are not palpable and require cross-sectional imaging for detection. This location can cause urinary obstruction, pelvic pain, and lower extremity lymphedema.
Documentation Requirements
- ✓Pathology confirming ALCL ALK-negative with CD30 positivity
- ✓CT, MRI, or PET/CT documenting intrapelvic lymph node involvement
- ✓Specific pelvic node groups identified (iliac, obturator, presacral)
- ✓T-cell lineage confirmed
- ✓Clinical staging
Commonly Confused Codes
C84.73 — ALCL ALK-negative, intra-abdominal: Abdominal nodes above the pelvic brimC84.75 — ALCL ALK-negative, inguinal/lower limb: Inguinal nodes are superficial groin nodesC84.66 — ALCL ALK-positive, intrapelvic: Different ALK statusC84.96 — Mature T/NK-cell lymphoma, unspecified, intrapelvic: Less specific; ALCL code preferred when confirmed
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.7Anaplastic large cell lymphoma, ALK-negative└C84.76Anaplastic large cell lymphoma, ALK-negative, intrapelvic lymph nodes
└C84.76Anaplastic large cell lymphoma, ALK-negative, intrapelvic lymph nodes