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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 > Diseases Of Hard Tissues Of Teeth 521.* > 2008 ICD-9-CM Diagnosis 521.3 Erosion of teeth Progressive loss of the hard substance of a tooth by chemical processes that do not involve bacterial action. (Jablonski, Dictionary of Dentistry, 1992, p296) 521.3 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 521.* hierarchy 521.3 also known as: Erosion of teeth: NOS due to: medicine persistent vomiting idiopathic occupational