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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 521.05 Odontoclasia  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 Therefore, this code may be out of date.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 521.05 can be accessed here. 521.05 is a specific code that can be used to specify a diagnosis 521.05 contains 4 index entries View the ICD-9-CM Volume 1 521.* hierarchy 521.05 also known as: Infantile melanodontia Melanodontoclasia 521.05 excludes: internal and external resorption of teeth (521.40-521.49) Index entries containing 521.05: Infantile - see also condition melanodontia 521.05 Melanodontia, infantile 521.05 Melanodontoclasia 521.05 Odontoclasia 521.05