Disclosed herein are implantable fistula treatment devices and methods. In some embodiments, a distal anchor for an implantable fistula treatment device may comprise a suture and multiple foldable members including at least a distal-most foldable member and a proximal-most foldable member. The distal-most foldable member may comprise a suture attachment structure. The proximal-most foldable member may be configured to couple to a surface of a body lumen at a distal opening of a fistula.
