The document outlines key genomic alterations in non-small cell lung cancer (NSCLC) and their associated targeted therapies, highlighting FDA-approved options and the importance of molecular testing. It emphasizes the role of circulating tumor DNA (ctDNA) in liquid biopsies as a cost-effective alternative to tissue biopsies for monitoring treatment response and detecting mutations. Recommendations for molecular testing techniques and the necessity of testing all patients with stage IV NSCLC as quickly as possible are also provided.