The anterior third of the tongue is usually free or is partially attached to the floor of the mouth by the lingual frenulum. There is a spectrum ranging from fusion of the tongue to the floor of the mouth (ankyloglossia inferiorum) to a lingual frenulum that is short or anchored toward the tip of the tongue (sometimes called tongue tie). Ankyloglossia may be associated with a mild indentation of the tip of the tongue, which should not be coded as a Bifid tongue.