(US) Ra Medical Systems, Inc. engages in the design, development, and commercialization of excimer lasers for the treatment of dermatologic and cardiovascular diseases. Its product, Pharos, is used for the treatment of difficult-to-treat, chronic diseases including psoriasis and vitiligo. It operates through the Dermatology and Vascular business segments. The company was founded by Dean Irwin and Melissa Burstein in 2002 and is headquartered in Carlsbad, CA.