ICD-10 Code K08.5 – Unsatisfactory restoration of tooth (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K08.5 – Unsatisfactory restoration of tooth
What it is
K08.5 identifies a dental restoration that is present but not satisfactory, meaning it does not meet clinical expectations for function, fit, or integrity. Use it when the record documents a problematic filling, crown, bridge, or similar restoration.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include marginal breakdown, poor adaptation, recurrent caries, looseness, fracture, or patient-reported discomfort related to the restoration.
When to use this code
Use K08.5 when the dentist documents an existing restoration as unsatisfactory and the reason is not coded elsewhere. It fits charted cases where the restoration needs evaluation, repair, or replacement because it is defective, worn, or poorly fitting. Check documentation if the note only describes routine maintenance.
Do not use for
Do not use this code for a normal, intact restoration or for general tooth decay without mention of a restoration problem. If the record describes another specific dental disorder, code that condition instead.
Coding tip
Code K08.5 only when the provider clearly links the problem to an unsatisfactory restoration, not just to tooth pain or a dental visit.