2006 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 > 2006 ICD-9-CM Diagnosis 522 Diseases of pulp and periapical tissues View the most recent version of ICD-9-CM 522 522 is a non-specific code that cannot be used to specify a diagnosis