C77.8

HCC Category Mapping

What This Code Means

Cancer that has spread to lymph nodes in multiple different regions of the body, either as a secondary spread from another cancer or when the primary source is unknown.

Coding Tips

• •Use this code only when lymph node involvement is documented in multiple non-contiguous regions; if involvement is in a single region, use the specific regional code
• •Always attempt to identify and code the primary malignancy separately when possible

Clinical Significance

Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions indicates metastatic cancer has spread to lymph node groups in more than one anatomical region. This represents advanced metastatic disease and is a significant prognostic indicator. When multiple lymph node regions are involved, it often signifies widespread dissemination and impacts staging and treatment decisions profoundly.

Documentation Requirements

• ✓Documentation specifying which multiple lymph node regions are involved
• ✓Consider coding each regional lymph node group separately instead of using this combined code
• ✓Pathology or imaging confirming malignant lymphadenopathy in multiple regions
• ✓Identification and separate coding of the primary malignancy
• ✓Staging assessment reflecting multi-regional nodal involvement

Commonly Confused Codes