ICD-10 Code K05.329 – Chronic periodontitis, generalized, unspecified severity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05.329 – Chronic periodontitis, generalized, unspecified severity
What it is
K05.329 identifies chronic periodontitis affecting multiple teeth throughout the mouth, without a documented severity level. Use it when the record states generalized periodontal disease but does not specify mild, moderate, or severe.
Clinical signs
Typical findings include inflamed gums, periodontal pocketing, attachment loss, and possible tooth mobility. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents chronic periodontitis as generalized and does not assign a severity category. It also fits dental or periodontal assessments that describe widespread chronic disease across the dentition. If the note gives a specific severity, code that documented level instead.
Do not use for
Do not use it for localized periodontitis or for gingivitis without periodontal attachment loss. Check documentation if the record describes an acute periodontal condition or another oral diagnosis.
Coding tip
Confirm both “generalized” and “unspecified severity” are documented before assigning K05.329.