ICD-10 Code K03 – Other diseases of hard tissues of teeth (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K03 – Other diseases of hard tissues of teeth
What it is
K03 covers disorders of the hard tissues of the teeth, such as enamel, dentin, and cementum, when they are not classified elsewhere. Use it for tooth-structure conditions that do not fit a more specific ICD-10-CM code.
Clinical signs
Findings may include abnormal tooth wear, loss of hard tissue, discoloration, or structural defects seen on exam. Clinical features vary; refer to documentation.
When to use this code
Use K03 when the record documents a disease of tooth hard tissues and no more specific diagnosis is available. It may apply to generalized or localized enamel, dentin, or cementum problems. Check documentation if the provider names a specific condition elsewhere in the chart.
Do not use for
Do not use K03 for caries, pulp disease, periodontal disease, or soft-tissue oral disorders. If the note identifies a specific dental diagnosis, code that condition instead.
Coding tip
Code the most specific documented hard-tissue disorder first, and use K03 only when the chart supports a nonspecific or other hard-tissue diagnosis.