The coronavirus disease 2019 (COVID-19) or severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has affected different communities all over the world. A wide spectrum of complications has been reported due to COVID-19 infection, among which a hypercoagulability state is one of the most significant. The patient was a 44-year-old obese woman with a history of diabetes, hypothyroidism, cigarette smoking and opium addiction, who had recently been diagnosed with COVID -19 and had undergone cardiac surgery due to right atrial thrombosis. The patient was also affected by bilateral upper extremity thrombosis 20 days after surgery. Protein C deficiency was diagnosed by measuring serum levels and she was discharged from the hospital with apixaban instead of warfarin due to protein c deficiency.