Jan Chozen Bays, MD (born 1945), is a pediatrician and Zen teacher practicing in Oregon. With her husband Laren Hogen Bays, since 1985 she has been a teacher at the Zen Community of Oregon, a Zen center or sangha in Portland, Oregon. Before founding Great Vow she was the founder of Larch Mountain Zen Center, also in the Portland area, and prior to that she and Hogen were longtime residents of the LA Zen Center, founded by Maezumi Roshi.