C85.89

HCC Category Mapping

What This Code Means

A rare or unusual type of non-Hodgkin lymphoma affecting organs or tissues outside the lymph node system, such as the liver, lungs, or other solid organs.

Coding Tips

• •Extranodal involvement means the cancer has spread beyond lymph nodes to other organs or tissues
• •Document the specific extranodal sites involved (liver, lung, GI tract, etc.) for complete clinical documentation

Clinical Significance

Other specified non-Hodgkin lymphoma involving extranodal and solid organ sites captures rare, named NHL subtypes at a defined anatomical location. Accurate site-specific coding supports treatment planning, radiation field design, and outcomes tracking. These lymphoma subtypes often have distinct clinical behaviors and treatment requirements compared to common NHL types.

Documentation Requirements

• ✓Pathology confirming the specific NHL subtype by WHO classification (with immunophenotyping and molecular studies)
• ✓Imaging or clinical documentation confirming involvement of extranodal and solid organ sites
• ✓Verification that no more specific ICD-10 code exists for this NHL subtype
• ✓Staging information and treatment plan

Commonly Confused Codes