This is a Phase 1b/2, open-label, non-randomized, multicenter study evaluating the safety and efficacy of rociletinib administered in combination with MPDL3280A.~Phase 1: This will be the dose finding phase of the study. Patients will be enrolled to available Dosing Cohort. Patients who have progressed after prior first- or second-generation EGFR TKI, regardless of T790M mutation status, will be enrolled.~Phase 2: Patients will be enrolled into 2 groups. Group A will enroll eligible first-line patients who are EGFR TKI treatment-naïve and chemotherapy-naïve. Group B will enroll eligible patients who have progressed after prior first- or second-generation EGFR TKI, regardless of T790M mutation status.
This clinical research study is being carried out in two parts, Phase 1 and Phase 2. The primary purpose of the Phase 1 portion of the study is to observe the safety of the combination of rociletinib and MPDL3280A in EGFR-mutant NSCLC patients.~The primary purpose of the Phase 2 portion of the study is to evaluate the safety and anti-tumor effects of the combination of rociletinib and MPDL3280A, at the best doses for the combination determined in Phase 1, in patients with EGFR-mutant NSCLC.