|  | Age | Smoking History | Additional Requirement | 
| American Association of Thoracic Surgery | 55-79 | ≥ 30 Pack-Years | Tobacco Use Within 15 Years | 
| 50-79 | ≥ 20 Pack-Years | Cumulative Risk > 5% Over Next 5 Years | 
| American Cancer Society | 55-74 | ≥ 30 Pack-Years | Tobacco Use Within 15 Years | 
| American College of Chest Physicians | 55-77 | ≥ 30 Pack-Years | Tobacco Use Within 15 Years | 
| American Society of Clinical Oncology | 55-74 | ≥ 30 Pack-Years | Tobacco Use Within 15 Years | 
| Canadian Task Force on the Periodic Health Examination | 55-74 | ≥ 30 Pack-Years | Tobacco Use Within 15 Years | 
| National Comprehensive Cancer Network (NCCN) | 55-74 | ≥ 30 Pack-Years | Tobacco Use Within 15 Years | 
| ≥ 50 | ≥ 20 Pack-Years | One Additional Risk Factor | 
| US Preventative Services Task Force (USPSTF) | 50-80 | ≥ 20 Pack-Years | Tobacco Use Within 15 Years |