ICD-10 Code K00.2 – Abnormalities of size and form of teeth (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K00.2 – Abnormalities of size and form of teeth
What it is
K00.2 identifies developmental abnormalities in the size or shape of teeth. Use it when documentation shows teeth that are unusually large, small, malformed, or otherwise atypical in form.
Clinical signs
Clinical features vary; refer to documentation. Findings may include visibly enlarged or reduced teeth, abnormal crown shape, or teeth with unusual contour noted on dental examination or imaging.
When to use this code
Use K00.2 when the provider documents a congenital or developmental tooth-size or tooth-form abnormality as the reason for evaluation. It fits charted descriptions such as peg-shaped, microdontic, or macrodontic teeth when no more specific code is recorded.
Code it from dental or medical documentation that clearly identifies the anomaly, not from cosmetic concerns alone. If the record only says “abnormal teeth” without detail, check documentation before assigning the code.
Do not use for
Do not use this code for tooth color changes, caries, fractures, or alignment problems. Check documentation if the finding is actually a structural defect, trauma, or another dental disorder.
Coding tip
Capture the exact descriptive term in the note, because specificity helps confirm K00.2 and avoids confusion with other dental anomalies.