ICD-10 Code K03.9 – Disease of hard tissues of teeth, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K03.9 – Disease of hard tissues of teeth, unspecified
What it is
K03.9 identifies a disorder affecting the hard tissues of the teeth, but the chart does not specify the exact condition. Use it when documentation confirms a tooth hard-tissue disease without a more precise diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may include visible tooth damage, enamel or dentin changes, or other hard-tissue abnormalities, but the record must support a nonspecific dental disease.
When to use this code
Use K03.9 when the dentist or provider documents a hard-tissue tooth disorder and does not name a specific entity such as caries, attrition, erosion, abrasion, or developmental defect. It is appropriate when the note is limited or the exact lesion is not established. Check documentation before assigning it.
Do not use for
Do not use this code when a more specific diagnosis is documented or when the problem is clearly outside hard tissues, such as gingival or periodontal disease. Do not code it as a default for tooth pain alone.
Coding tip
Query for the exact tooth condition whenever possible; unspecified coding should reflect the documentation, not a lack of review.