C82.33

Billable

Follicular lymphoma grade IIIa, 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 blood cancer (follicular lymphoma grade IIIa) affecting lymph nodes in the abdomen. Grade IIIa is a more aggressive form of this cancer.

Coding Tips

•Verify intra-abdominal lymph node involvement through CT or ultrasound documentation
•Distinguish from splenic involvement (C82.37) which is coded separately

Clinical Significance

Follicular lymphoma grade IIIa in intra-abdominal lymph nodes indicates high-grade follicular disease with centrocyte presence in the mesenteric or retroperitoneal nodal chains. Abdominal disease is common in follicular lymphoma and may be the dominant site of bulk. Grade IIIa is a clinical gray zone where treatment approach may vary between indolent and aggressive strategies.

Documentation Requirements

✓Pathology confirming grade IIIa follicular lymphoma
✓Cross-sectional imaging documenting abdominal lymph node involvement
✓Specific abdominal nodal chains involved
✓Assessment for bowel obstruction or compression symptoms
✓Treatment plan reflecting the IIIa-specific management considerations

Commonly Confused Codes

C82.23 — Grade III unspecified, intra-abdominal; use C82.33 when IIIa is confirmed C82.43 — Grade IIIb, intra-abdominal; different subtype with more aggressive management C82.13 — Grade II, intra-abdominal; lower grade C82.36 — Grade IIIa, intrapelvic; distinguish abdominal from pelvic nodes

Code Hierarchy

└C82Follicular lymphoma └C82.3Follicular lymphoma grade IIIa └C82.33Follicular lymphoma grade IIIa, intra-abdominal lymph nodes

└C82.33Follicular lymphoma grade IIIa, intra-abdominal lymph nodes