522 Diseases of pulp and periapical tissues 
522.0 Pulpitis convert 522.0 to ICD-10-CM 522.1 Necrosis of the pulp convert 522.1 to ICD-10-CM 522.2 Pulp degeneration convert 522.2 to ICD-10-CM 522.3 Abnormal hard tissue formation in pulp convert 522.3 to ICD-10-CM 522.4 Acute apical periodontitis of pulpal origin convert 522.4 to ICD-10-CM 522.5 Periapical abscess without sinus convert 522.5 to ICD-10-CM 522.6 Chronic apical periodontitis convert 522.6 to ICD-10-CM 522.7 Periapical abscess with sinus convert 522.7 to ICD-10-CM 522.8 Radicular cyst convert 522.8 to ICD-10-CM
522.9 Other and unspecified diseases of pulp and periapical tissues convert 522.9 to ICD-10-CM