Malignant neoplasm of liver, secondary

This code signifies the presence of a cancerous tumor in the liver that originated from a primary cancer elsewhere in the body and spread to the liver. It indicates metastatic disease to the liver, not a primary liver cancer. The liver is a common site for metastases due to its rich blood supply.

Use this code when documentation clearly states "metastatic liver cancer," "secondary malignant neoplasm of liver," or "liver metastases" from a known or unknown primary site. This code is appropriate when the liver is involved by cancer that originated in another organ, such as the colon, lung, or breast.

• Always sequence the primary malignant neoplasm first, followed by this code for the secondary site, unless the primary site is unknown or has been excised and is no longer being treated.
• Do not use this code for primary liver cancer (e.g., hepatocellular carcinoma); refer to codes in the 155.0-155.2 range for those conditions.
• Ensure the medical record explicitly identifies the liver involvement as metastatic, not a new primary tumor.