My physician (an extremely brilliant pulmonologist) is stating that if his patient had lung cancer that was treated, he considers that cancer "active" until 5 years have passed since the treatment and he would like to use a "current" lung cancer diagnosis. He does not consider the cancer eradicated until the patient shows no evidence of disease for 5 years post-treatment and he feels that other physicians would agree. ICD-10 Coding Guidelines state that "Personal history codes explain a patient's past medical condition that no longer exists and is not receiving any treatment but that has the potential for recurrence, and therefore may require continued monitoring". I would prefer to use a "history of" diagnosis because the patient is not receiving active treatment, just monitoring. Is there a right or wrong answer here?