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2007 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 > Diseases Of Hard Tissues Of Teeth 521.* > 2007 ICD-9-CM Diagnosis 521.30 Erosion, unspecified This code may be outdated. View the most recent version of ICD-9-CM 521.30 521.30 is a specific code that can be used to specify a diagnosis 521.30 contains 4 index entries View the ICD-9-CM Volume 1 521.* hierarchy Index entries containing 521.30: Erosion dental (idiopathic) (occupational) 521.30 extending into dentine 521.32 pulp 521.33 generalized 521.35 limited to enamel 521.31 localized 521.34 teeth (idiopathic) (occupational) (see also Erosion, dental) 521.30 due to medicine 521.30 persistent vomiting 521.30