ICD-10 Code K03.3 – Pathological resorption of teeth (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K03.3 – Pathological resorption of teeth
What it is
K03.3 identifies pathologic loss of tooth structure caused by resorption, not normal wear. Use it when documentation shows the tooth is being broken down internally or externally by a disease process.
Clinical signs
Findings may include unexplained shortening, irregular defects, or radiographic evidence of tooth structure loss. Clinical features vary; refer to documentation, especially when the provider describes internal or external resorption.
When to use this code
Use K03.3 when the record states pathological resorption of one or more teeth, including cases identified on exam or imaging. It may apply when the dentist documents resorption as the primary diagnosis and no more specific code is given. Check documentation for the affected tooth and whether the process is localized or generalized.
Do not use for
Do not use this code for normal attrition, abrasion, or erosion from biting, brushing, or acid exposure. Also avoid it when the chart only mentions tooth pain, caries, or fracture without resorption.
Coding tip
Code K03.3 only when the provider explicitly documents pathologic resorption; otherwise, query for clarification.