This study is a multi-center, prospective cohort study designed to characterize current clinical practice, clinical and patient-reported outcomes (PROs), disease prognosis, treatment patterns and healthcare resource utilization for Chinese patients with myasthenia gravis (MG). This study will enroll patients with MG as diagnosed by physician. Approximately 1,200 MG patients are intended to be recruited from approximately 40 sites across majority of regions in China. The clinical and PROs included MGFA class, MGFA PIS, MG-ADL (Activities of Daily Living), QMG (Quantitative MG score), MG QOL-15R, EQ-5D etc. All MG patients enrolled will be followed up every 6 months until end of 2027.