ICD-10 Code K03.4 – Hypercementosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K03.4 – Hypercementosis
What it is
Hypercementosis means excessive cementum buildup on a tooth root. Use this code when documentation describes abnormal thickening of the root surface, usually identified on dental imaging or clinical examination.
Clinical signs
Findings may include enlarged or bulbous tooth roots, often seen on radiographs. Clinical features vary; refer to documentation for whether the condition is incidental or associated with symptoms.
When to use this code
Use K03.4 when the record specifically documents hypercementosis, including when it is noted as a radiographic finding. You may also use it when the dentist documents root cementum overgrowth affecting one or more teeth. If the chart does not clearly identify the condition, check documentation.
Do not use for
Do not use this code for other tooth root abnormalities, generalized dental calcification, or nonspecific radiology findings. If the note only says “abnormal tooth root” without confirming hypercementosis, check documentation.
Coding tip
Code only when the provider names hypercementosis or clearly documents excess cementum on the root.