2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Diseases Of Oral Cavity, Salivary Glands, And Jaws 520-529 > Disorders Of Tooth Development And Eruption 520.* > 2006 ICD-9-CM Diagnosis 520.1 Supernumerary teeth View the most recent version of ICD-9-CM 520.1 An extra tooth, erupted or unerupted, resembling or unlike the other teeth in the group to which it belongs. Its presence may cause malposition of adjacent teeth or prevent their eruption. 520.1 is a specific code that can be used to specify a diagnosis 520.1 contains 8 index entries View the ICD-9-CM Volume 1 520.* hierarchy Alternate Terminology Distomolar Fourth molar Mesiodens Paramolar Supplemental teeth 520.1 Excludes supernumerary roots (520.2)  Index entries containing 520.1: Accessory (congenital) teeth, tooth 520.1 causing crowding 524.31 Distomolar (fourth molar) 520.1 causing crowding 524.31 Excess, excessive, excessively number of teeth 520.1 causing crowding 524.31 Fourth molar 520.1 Mesiodens, mesiodentes 520.1 causing crowding 524.31 Paramolar 520.1 causing crowding 524.31 Supernumerary (congenital) teeth 520.1 causing crowding 524.31 Supplemental teeth 520.1 causing crowding 524.31