Atezolizumab and Bevacizumab in EGFR Mutant NSCLC in Patients With Progressive Disease After Receiving Osimertinib

This study will be single arm, open label, phase 2 study which will include patients with stage 4 NSCLC patients with EGFR mutations and who have progressed on osimertinib. Although both atezolizumab and bevacizumab are approved for the treatment of NSCLC, the combination of atezolizumab and bevacizumab has not been approved by the FDA for the treatment of specific non-small cell lung cancer (NSCLC). Patients who have one of the following EGRF mutations: exon 19 or exon 21 L858R with progressive disease on osimertinib may be eligible to participate in this study. If enrolled into the study, the study team will give the patient atezolizumab (1200 mg) combined with bevacizumab (15 mg/kg) every 3 weeks intravenously. As part of this study, the patient will have blood samples, other tests, exams, and procedures done for study purposes and their standard of care. Patient participation in the study will last for up to 2 years after completion of the last dose of the study drug or until your condition worsens or intolerable adverse events as deemed by the study doctor. There are possible patient risks to this study that include but are not limited to diarrhea, itching, rash, and a feeling of weakness.