This is a clinical practice guideline for patients who have undergone treatment for primary lung cancer and are in follow-up. The guideline provides recommendations on post-treatment surveillance and follow-up procedures. CT scan, PET imaging, somatostatin receptor scintigraphy, abdominal ultrasonography, surveillance biomarker testing, and surveillance bronchoscopy are discussed as follow-up procedures. Other topics of discussion include the participation of the original treating physician in follow-up care, and the use of a validated health-related quality-of-life (QOL) instrument. Outcomes of interest include survival, quality of life and recurrence rate.