2008 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 > Dentofacial Anomalies Including Malocclusion 524.* > 2008 ICD-9-CM Diagnosis 524.20 Unspecified anomaly of dental arch relationship  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 524.20 can be accessed here. 524.20 is a specific code that can be used to specify a diagnosis 524.20 contains 5 index entries View the ICD-9-CM Volume 1 524.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 524.20: Abocclusion 524.20 Anomaly, anomalous (congenital) (unspecified type) 759.9 dental arch 524.20 specified NEC 524.29 dental arch relationship 524.20 angle's class I 524.21 angle's class II 524.22 angle's class III 524.23 articulation anterior 524.27 posterior 524.27 reverse 524.27 disto-occlusion 524.22 division I 524.22 division II 524.22 excessive horizontal overlap 524.26 interarch distance (excessive) (inadequate) 524.28 mesio-occlusion 524.23 neutro-occlusion 524.21 open anterior occlusal relationship 524.24 posterior occlusal relationship 524.25 specified NEC 524.29 Apertognathia 524.20 Closed bite 524.20