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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 521.35 Erosion, generalized  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 Therefore, this code may be out of date.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 521.35 can be accessed here. 521.35 is a specific code that can be used to specify a diagnosis 521.35 contains 1 index entry View the ICD-9-CM Volume 1 521.* hierarchy Index entries containing 521.35: Erosion dental (idiopathic) (occupational) 521.30 generalized 521.35