"Question ID","Question","Discussion","Answer","Year" "20021200","Date of Diagnosis: How do you code this field when the pathologic confirmation is delayed for 2 months because the clinician decides to ""watch and see what happens"" to a CT identified mass thought to be either a ""metastasis from a previously diagnosed malignancy or a new primary""?","","Code the Date of Diagnosis field to the date of the scan. This is the earliest date that a recognized medical practitioner said the patient had cancer. The diagnosis on the CT scan was a malignancy. The only question was whether the mass on the scan was metastatic or a primary.","2002"