ICD-10 Code K05 – Gingivitis and periodontal diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05 – Gingivitis and periodontal diseases
What it is
K05 covers inflammatory and destructive conditions affecting the gums and supporting tissues around the teeth. Use it when the record documents gingivitis, periodontitis, or another periodontal disease.
Clinical signs
Common findings include red, swollen, or bleeding gums, gum recession, and periodontal pocketing. Clinical features vary; refer to documentation.
When to use this code
Use K05 when the provider diagnoses a gingival or periodontal disorder and does not assign a more specific subcode. It fits outpatient, dental, or medical records describing disease of the gums or supporting tooth structures. Confirm whether the note identifies gingivitis, periodontitis, or another periodontal condition.
Do not use for
Do not use K05 for normal gum irritation without a documented periodontal diagnosis. If the record is unclear or another oral condition is named, check documentation.
Coding tip
Look for the exact periodontal diagnosis and any documented severity or stage before choosing the most specific K05 code.