BEYONDXLH will enroll participants with XLH, Tumor Induced Osteomalacia (TIO), and other hypophosphatemic disorders so we can learn more about these disorders. It will gather information on how the disorder you experience affects your daily life. Information provided will expand the understanding of XLH. The information may also help improve patient care across multiple conditions, and will guide the development of new treatments. You do not have to be on any particular medicine or therapy in order to participate.