ICD-10 Code K05.6 – Periodontal disease, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05.6 – Periodontal disease, unspecified
What it is
K05.6 is used for periodontal disease when the record does not specify the exact type. It indicates disease affecting the gums and supporting structures of the teeth, but the documentation is not detailed enough for a more specific code.
Clinical signs
Common findings may include inflamed or bleeding gums, gum recession, or loosening of teeth. Clinical features vary; refer to documentation.
When to use this code
Use K05.6 when the provider documents periodontal disease without naming gingivitis, periodontitis, or another specific subtype. It is also appropriate when the note confirms periodontal disease but does not describe severity, extent, or anatomic site. You should code from the documented diagnosis, not from assumptions.
Do not use for
Do not use this code for simple gingivitis, periodontitis with a stated type, or other clearly specified periodontal conditions. Check documentation if the record gives a more precise diagnosis.
Coding tip
If the chart says only “periodontal disease,” K05.6 is usually the correct default unless the clinician specifies a more exact form.