Lucid Diagnostics Inc. operates as a commercial-stage medical diagnostics technology company. It focuses on patients with gastroesophageal reflux disease, also known as chronic heartburn, acid reflux or simply reflux, who are at risk of developing esophageal precancer and cancer, specifically highly lethal esophageal adenocarcinoma. The company's lead products include EsoGuard, a laboratory developed esophageal DNA test that examines individuals DNA molecules for the presence or absence of cytosine methylation; and EsoCheck, a cell collection device that collects cells of targeted region of the esophagus. Lucid Diagnostics Inc. was incorporated in 2018 and is based in New York, New York. Lucid Diagnostics Inc. is a subsidiary of PAVmed Inc.