ICD-10 Code K05.311 – Chronic periodontitis, localized, slight (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05.311 – Chronic periodontitis, localized, slight
What it is
This code identifies a chronic inflammatory gum disease affecting a localized area of the mouth with slight severity. It reflects periodontal tissue destruction limited to specific teeth or sites.
Clinical signs
Common findings include inflamed gums, pocketing, and attachment loss in a localized pattern. Clinical features vary; refer to documentation for the extent of involvement and severity.
When to use this code
Use K05.311 when the record clearly states chronic periodontitis, localized, slight. The chart should support both the chronic nature and the localized distribution. If the provider documents only periodontitis without severity or location, check documentation before coding.
Do not use for
Do not use this code for generalized periodontitis, acute periodontal disease, or gingivitis. Check documentation if the note describes another periodontal condition or does not specify slight localized disease.
Coding tip
Code only when the provider documents localized extent and slight severity together; otherwise, query for clarification.