C83.03
BillableSmall cell B-cell lymphoma, intra-abdominal lymph nodes
HCC Category Mapping
V28HCC 21 — Breast, Prostate, Colorectal and Other Cancers and Tumors
0.545V24HCC 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 cancer of the lymph system (small cell B-cell lymphoma) affecting the lymph nodes inside the abdominal cavity.
Coding Tips
- •Confirm documentation specifies intra-abdominal lymph nodes (mesenteric, retroperitoneal, etc.)
- •Review imaging reports (CT abdomen/pelvis) to verify the specific location and extent of lymph node involvement
Clinical Significance
Small cell B-cell lymphoma involving intra-abdominal lymph nodes indicates lymphomatous disease in mesenteric, retroperitoneal, or celiac lymph node groups. Abdominal involvement may be associated with gastrointestinal symptoms, bowel obstruction, or organ compression, requiring careful staging to guide therapeutic decisions.
Documentation Requirements
- ✓Pathology-confirmed small cell B-cell lymphoma histology
- ✓Specific intra-abdominal lymph node groups identified (mesenteric, retroperitoneal, celiac, para-aortic)
- ✓Cross-sectional imaging (CT abdomen/pelvis or PET/CT) confirming abdominal lymph node involvement
- ✓Ann Arbor stage documentation
- ✓Treatment status and response assessment
Commonly Confused Codes
C83.06 — Small cell B-cell lymphoma, intrapelvic nodes; differentiate based on anatomical location above vs. below the pelvic brimC83.09 — Extranodal and solid organ sites; use C83.03 when disease is in abdominal lymph nodes, not solid organs like liver or spleenC83.07 — Small cell B-cell lymphoma, spleen; spleen is coded separately from intra-abdominal nodes
Code Hierarchy
└C83Non-follicular lymphoma└C83.0Small cell B-cell lymphoma└C83.03Small cell B-cell lymphoma, intra-abdominal lymph nodes
└C83.03Small cell B-cell lymphoma, intra-abdominal lymph nodes