C85.96

HCC Category Mapping

What This Code Means

This code describes a type of cancer affecting the lymph nodes located in the pelvis (lower abdomen area) where the specific type of non-Hodgkin lymphoma has not been identified or specified. Non-Hodgkin lymphoma is a cancer of the immune system that starts in lymph nodes.

Coding Tips

• •Verify documentation specifies the lymph node location as intrapelvic; if lymph nodes in other locations are also involved, additional codes may be needed for each site
• •This 'unspecified' code should only be used when the pathology report does not provide enough detail to assign a more specific non-Hodgkin lymphoma subtype; query the provider if additional histological information is available

Clinical Significance

Non-Hodgkin lymphoma of unspecified type affecting intrapelvic lymph nodes involves deep nodal groups including iliac, obturator, and sacral lymph nodes. Intrapelvic lymphoma may be clinically silent until it reaches a size sufficient to compress adjacent pelvic structures, potentially causing urinary or bowel symptoms. This deep location typically requires cross-sectional imaging for detection and CT-guided biopsy for tissue diagnosis.

Documentation Requirements

• ✓Documentation must specify intrapelvic lymph node involvement as confirmed by imaging (CT, MRI, or PET-CT).
• ✓Provider should attempt to identify the specific NHL subtype through biopsy and immunohistochemistry.
• ✓Treatment plan, staging results, disease status, and any compressive symptoms must be recorded.

Commonly Confused Codes