Other abnormal tumor markers

This code indicates an abnormal finding of a tumor marker that is not specified elsewhere or is not a commonly recognized tumor marker with its own dedicated code. It signifies that a laboratory test for a substance associated with cancer has returned an atypical result, but the specific marker or its significance is not fully defined or categorized by more specific ICD-10-CM codes.

Use this code when documentation indicates an abnormal tumor marker result, but the specific marker is not listed in a more precise code (e.g., elevated PSA, CEA, CA-125, AFP, etc.). This code is appropriate when the physician explicitly states "other abnormal tumor marker" or when a specific, less common tumor marker is abnormal and no other code applies.

• Always seek clarification if the specific tumor marker is mentioned but no dedicated code exists, to ensure it's not a misinterpretation of a more common marker.
• This code should generally be sequenced after the definitive diagnosis of cancer, if known, or as a primary diagnosis if the abnormal marker is the reason for the encounter and no definitive diagnosis has been established.
• Avoid using this code if a more specific abnormal tumor marker code (e.g., R97.0-R97.7) is available and documented.