C82.43

Billable

Follicular lymphoma grade IIIb, intra-abdominal lymph nodes

HCC Category Mapping

V28HCC 21 — Breast, Prostate, Colorectal and Other Cancers and Tumors

0.545

V24HCC 10 — Lymphoma and Other Cancers

0.675

ESRDHCC 10 — Lymphoma and Other Cancers

0.000

RxHCCHCC 21 — Hodgkin Lymphoma and Other Cancers

0.000

What This Code Means

A type of cancer of the lymph system (follicular lymphoma) that is grade IIIb and located in the lymph nodes within the abdominal cavity.

Coding Tips

•Intra-abdominal lymph nodes are located deep within the abdomen; ensure imaging confirms this location
•Abdominal involvement may be detected through CT scans or other imaging studies; document findings clearly

Clinical Significance

Follicular lymphoma grade IIIb in intra-abdominal lymph nodes represents the most aggressive follicular subtype in the mesenteric or retroperitoneal chains. Grade IIIb abdominal disease may cause significant symptoms from bulky adenopathy including bowel obstruction and requires curative-intent treatment. Accurate grade subtype coding supports appropriate treatment authorization and outcomes tracking.

Documentation Requirements

✓Pathology confirming grade IIIb pattern (centroblast sheets only)
✓Cross-sectional imaging with abdominal node measurements
✓Assessment for GI complications
✓Expert pathology distinction from DLBCL
✓Curative-intent treatment plan

Commonly Confused Codes

C82.33 — Grade IIIa, intra-abdominal; IIIa retains centrocytes C82.23 — Grade III unspecified, intra-abdominal; use C82.43 when IIIb is confirmed C83.33 — DLBCL, intra-abdominal; if reclassified by expert pathology C82.46 — Grade IIIb, intrapelvic; distinguish abdominal from pelvic nodes

Code Hierarchy

└C82Follicular lymphoma └C82.4Follicular lymphoma grade IIIb └C82.43Follicular lymphoma grade IIIb, intra-abdominal lymph nodes

└C82.43Follicular lymphoma grade IIIb, intra-abdominal lymph nodes