ICD-10 Code K05.323 – Chronic periodontitis, generalized, severe (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05.323 – Chronic periodontitis, generalized, severe
What it is
This code identifies severe, long-standing periodontal inflammation affecting most teeth. It indicates advanced tissue and bone support loss around the teeth, with disease distributed throughout the mouth.
Clinical signs
Typical findings include generalized gum inflammation, periodontal pocketing, attachment loss, and alveolar bone loss. Clinical features vary; refer to documentation for the extent and severity of disease.
When to use this code
Use this code when documentation clearly states chronic periodontitis that is generalized and severe. It fits dental or periodontal assessments describing widespread destructive periodontal disease, not isolated gingival inflammation. If the record does not specify severity or distribution, check documentation.
Do not use for
Do not use it for gingivitis, acute periodontal abscess, or periodontitis described without generalized severe involvement. If the chart only says “periodontal disease” or gives incomplete detail, verify the wording before coding.
Coding tip
Match the code only to explicit documentation of both generalized distribution and severe chronic periodontitis.