Since the outbreak of coronavirus disease 2019 (COVID-19) in December 2019, an epidemic has spread rapidly worldwide . COVID-19 is caused by the highly infectious severe acute respiratory syndrome coronavirus-2 . A 42-year-old woman presented to hospital who was suffering from epigastric discomfort and dyspepsia for the past 5 days . Before the onset of symptoms, she was healthy, and had no travel history to Wuhan or contact with laboratory-confirmed COVID-19 cases . An examination showed chronic superficial gastritis with erosion and esophagitis . Enhanced magnetic resonance imaging of the abdomen showed a lesion in the right lower lobe of the lungs . Chest computed tomography showed multiple ground-glass opacity in the lungs . Reverse transcription-polymerase chain reaction was negative for severe acute respiratory syndrome coronavirus-2 . There was no improvement after antibiotic treatment . Polymerase chain reaction performed 2 days later was positive and she was diagnosed with COVID-19 . After several days of antiviral and symptomatic treatments, her symptoms improved and she was discharged . None of the medical staff were infected . Clinical manifestations of COVID-19 are nonspecific, making differentiating it from other diseases difficult . This case shows the sequence in which symptoms developed in a patient with COVID-19 with gastrointestinal symptoms as initial manifestations.