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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 521.09 Other dental caries  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 Therefore, this code may be out of date.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 521.09 can be accessed here. 521.09 is a specific code that can be used to specify a diagnosis 521.09 contains 4 index entries View the ICD-9-CM Volume 1 521.* hierarchy Index entries containing 521.09: Caries (bone) (see also Tuberculosis, bone) 015.9 [730.8] dental (acute) (chronic) (incipient) (infected) 521.00 other specified NEC 521.09 Necrosis, necrotic dental 521.09 pulp 522.1 teeth, tooth 521.09 Odontonecrosis 521.09