ICD-10 Code K08.42 – Partial loss of teeth due to periodontal diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K08.42 – Partial loss of teeth due to periodontal diseases
What it is
K08.42 identifies partial loss of teeth caused by periodontal disease. Use it when tooth loss is documented as a result of gum and supporting tissue disease rather than trauma or decay.
Clinical signs
Common findings include missing teeth with a documented history of periodontitis, gingival inflammation, and loss of periodontal support. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record states that some teeth have been lost because of periodontal disease. It fits dental or medical documentation describing partial edentulism linked to chronic periodontal destruction. Do not assume the cause if the chart only notes missing teeth.
Do not use for
Do not use it for tooth loss from caries, trauma, congenital absence, or extraction without a periodontal cause. Check documentation if the reason for tooth loss is unclear.
Coding tip
Code the documented cause of tooth loss, and confirm periodontal disease is explicitly linked to the missing teeth.