ICD-10 Code K08.431 – Partial loss of teeth due to caries, class I (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K08.431 – Partial loss of teeth due to caries, class I
What it is
K08.431 identifies partial loss of teeth caused by dental caries, limited to class I involvement. Use it when documentation shows tooth loss from decay rather than trauma, periodontal disease, or congenital absence.
Clinical signs
Clinical features vary; refer to documentation. Records may note missing teeth, decay-related destruction, retained roots, or a history of extraction because caries made the tooth nonrestorable.
When to use this code
Use this code when the provider documents partial tooth loss specifically attributed to caries and identifies the loss as class I. It is appropriate for coding dental or medical records that clearly connect the missing teeth to decay. Check documentation if the cause or class is not stated.
Do not use for
Do not use it for tooth loss from trauma, periodontal disease, congenital absence, or unspecified edentulism. If the record does not link the loss to caries, choose a more accurate code.
Coding tip
Code only when the chart states both the cause and the class; otherwise, query for clarification.