ICD-10 Code K00 – Disorders of tooth development and eruption (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K00 – Disorders of tooth development and eruption
What it is
K00 covers congenital or developmental problems affecting how teeth form, erupt, or are absent. Use it for abnormalities such as delayed eruption, abnormal tooth size or shape, and certain tooth number or formation disorders.
Clinical signs
Clinical features vary; refer to documentation. Findings may include delayed or failed tooth eruption, missing teeth, extra teeth, or abnormal tooth appearance noted on dental exam or imaging.
When to use this code
Use K00 when the record documents a disorder of tooth development or eruption as the primary diagnosis. It fits dental or medical encounters for congenital tooth anomalies, especially when the provider identifies the condition rather than a symptom alone.
Apply the code when the chart specifies malformed, unerupted, absent, or supernumerary teeth related to development. Check documentation if the note only mentions pain, swelling, or retained deciduous teeth without a developmental diagnosis.
Do not use for
Do not use K00 for acquired dental disease, trauma, or routine impacted teeth without a developmental basis. Check documentation if the issue is periodontal, caries-related, or due to another oral condition.
Coding tip
Code K00 only when the provider documents a developmental or eruption disorder, and capture the most specific subtype available.