ICD-10 Code K05.312 – Chronic periodontitis, localized, moderate (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05.312 – Chronic periodontitis, localized, moderate
What it is
K05.312 identifies chronic periodontal inflammation affecting a limited area of the mouth with moderate severity. Use it when the record specifies localized chronic periodontitis rather than generalized disease.
Clinical signs
Typical findings include inflamed gingiva, periodontal pocketing, attachment loss, and bone loss limited to specific teeth or sites. Clinical features vary; refer to documentation.
When to use this code
Use this code when the dentist or periodontist documents chronic periodontitis, localized, and notes moderate severity. It fits charted periodontal examination findings that clearly describe localized involvement and do not indicate an acute abscess or generalized disease.
Choose this code when the diagnosis is explicit in the assessment, operative note, or periodontal charting. Check documentation if the record only says “periodontitis” without laterality, extent, or severity.
Do not use for
Do not use K05.312 for gingivitis, acute periodontal conditions, or generalized chronic periodontitis. If the severity or extent is not documented, check documentation before assigning this code.
Coding tip
Code only when both localization and moderate severity are documented; otherwise, query for clarification.