C85.93
BillableNon-Hodgkin lymphoma, unspecified, 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
Non-Hodgkin lymphoma of unspecified type affecting the lymph nodes in the abdominal cavity.
Coding Tips
- •Intra-abdominal lymph nodes include retroperitoneal and mesenteric nodes
- •Confirm abdominal lymph node involvement is documented; distinguish from involvement of abdominal organs
Clinical Significance
Non-Hodgkin lymphoma of unspecified type affecting intra-abdominal lymph nodes involves malignant transformation of lymphoid tissue in retroperitoneal, mesenteric, or para-aortic nodal regions. Abdominal lymphoma may present with vague symptoms such as bloating, early satiety, or abdominal pain, often leading to delayed diagnosis. This location can complicate surgical staging and may involve adjacent visceral organs.
Documentation Requirements
- ✓Provider documentation must specify the lymph node involvement as intra-abdominal, distinguishing from organ-specific involvement.
- ✓Imaging studies (CT, PET-CT) confirming abdominal nodal disease should be referenced.
- ✓Pathology results, disease stage, treatment plan, and remission status are required for complete coding.
Commonly Confused Codes
C85.99 (NHL, extranodal and solid organ sites) is used when lymphoma involves abdominal organs rather than lymph nodes.C85.96 (intrapelvic lymph nodes) should be selected when disease is limited to pelvic nodes below the iliac crest.C83.x or C82.x should be used when the specific NHL subtype (diffuse large B-cell, follicular) is identified.
Code Hierarchy
└C85Other specified and unspecified types of non-Hodgkin lymphoma└C85.9Non-Hodgkin lymphoma, unspecified└C85.93Non-Hodgkin lymphoma, unspecified, intra-abdominal lymph nodes
└C85.93Non-Hodgkin lymphoma, unspecified, intra-abdominal lymph nodes