For people with disabilities, indoor routing approaches have to take the specific requirements of the target user group into account. Depending on the needs of the individual, certain objects and indoor features can present insurmountable barriers and hence, should be avoided when generating indoor routes. Research in the field of indoor routing for people with disabilities has been going on for several years, but most approaches focus on one specific disability and do not evaluate designed systems with the target user group. Therefore, we propose an accessible, adaptable indoor routing algorithm for people with disabilities. The designed system is evaluated in a user study with people with blindness and mobility impairments using a Wizard of Oz approach. Results indicate a good acceptance of the designed routing system.