Ra Medical Systems, Inc., a medical device company, develops, manufactures, and markets excimer lasers for use in the treatment of vascular immune-mediated inflammatory diseases. It offers destruction of arteriosclerotic blockages by laser radiation ablation, a minimally invasive excimer laser and single-use catheter system that is used by physicians in the endovascular treatment of vascular blockages resulting from lower extremity vascular disease. The company sells its products primarily through distributors in the United States. Ra Medical Systems, Inc. was incorporated in 2002 and is headquartered in Carlsbad, California.