C83.18

HCC Category Mapping

What This Code Means

Mantle cell lymphoma is a type of cancer that affects white blood cells called lymphocytes and has spread to lymph nodes in multiple locations throughout the body. This is an aggressive form of non-Hodgkin lymphoma that typically affects older adults.

Coding Tips

• •Verify documentation specifies 'multiple sites' of lymph node involvement before assigning this code; single site involvement requires a different code
• •Ensure the histology confirms mantle cell lymphoma and document the extent of lymph node involvement to support medical necessity for treatment planning

Clinical Significance

Mantle cell lymphoma involving multiple lymph node sites indicates advanced-stage disease, which is the most common presentation for this lymphoma subtype. Approximately 70-80% of mantle cell lymphoma patients present with Stage III or IV disease. Multi-site involvement necessitates systemic therapy and carries important prognostic implications.

Documentation Requirements

• ✓Pathology-confirmed mantle cell lymphoma
• ✓Documentation of at least two distinct lymph node regions involved
• ✓Comprehensive staging with PET/CT or CT documenting all involved sites
• ✓Ann Arbor stage (typically III or IV with multi-site involvement)
• ✓MIPI prognostic score documentation

Commonly Confused Codes