G9084 HCPCS - ONCOLOGY; DISEASE STATUS; COLON CANCER, LIMITED TO INVASIVE CANCER, ADENOCARCINOMA AS PREDOMINANT CELL TYPE; EXTENT OF DISEASE INITIALLY ESTABLISHED AS T1-3, N0, M0 WITH NO EVIDENCE OF DISEASE PROGRESSION, RECURRENCE, OR METASTASES (FOR USE IN A MEDICARE-APPROVED DEMONSTRATION PROJECT)