523 Gingival and periodontal diseases 
523.0 Acute gingivitis convert 523.0 to ICD-10-CM 523.1 Chronic gingivitis convert 523.1 to ICD-10-CM 523.2 Gingival recession 
523.20 "gingival recession, unspecified" convert 523.20 to ICD-10-CM 523.21 "gingival recession, minimal" convert 523.21 to ICD-10-CM 523.22 "gingival recession, moderate" convert 523.22 to ICD-10-CM 523.23 "gingival recession, severe" convert 523.23 to ICD-10-CM 523.24 "gingival recession, localized" convert 523.24 to ICD-10-CM
523.25 "gingival recession, generalized" convert 523.25 to ICD-10-CM 523.3 Acute periodontitis convert 523.3 to ICD-10-CM 523.4 Chronic periodontitis convert 523.4 to ICD-10-CM 523.5 Periodontosis convert 523.5 to ICD-10-CM 523.6 Accretions on teeth convert 523.6 to ICD-10-CM 523.8 Other specified periodontal diseases convert 523.8 to ICD-10-CM 523.9 Unspecified gingival and periodontal disease convert 523.9 to ICD-10-CM