EOD Mets

Coding metastasis for lung is based on several different factors

• No evidence of metastatic disease
  • Default to no metastatic disease when there is no documentation on the metastatic workup.
• Pericardial effusion or pleural effusion, separate tumor nodule in contralateral lung
• Single distant lymph node
• Single extrathoracic metastasis in single organ
• Multiple extrathoracic organs in a single organ system
  • Skeleton is considered one organ. So, if multiple bones were involved, it would still be considered one organ
• Multiple extrathoracic metastasis in multiple organ system

See SEER*RSA, Lung for the current version of EOD and complete coding instructions for the Lung schema.

Updated: April 8, 2026