An electronic door lock mounts to a door and includes an inner side and an outer side. The electronic door lock is operable to control access to an access controlled area positioned adjacent the inner side of the door. The electronic door lock includes an outer base connected to the outer side of the door, an inner base connected to the inner side of the door, a locking mechanism coupled to the door and movable between a locked position and an unlocked position in response to a control signal, and a control circuit disposed within the inner base and operable to generate the control signal in response to an input credential. An attachment interface is at least partially formed as part of the outer base. Each of a plurality of different types of credential readers is selectively attachable and removable from the attachment interface when the outer base is attached to the door to electrically connect a selected one of the plurality of different types of credential readers to the control circuit to provide the input. A communication module is connected to the control circuit, and the communication module is operable to communicate with a device that is separate from the electronic door lock.