ICD-10 Code K02.51 – Dental caries on pit and fissure surface limited to enamel (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K02.51 – Dental caries on pit and fissure surface limited to enamel
What it is
K02.51 identifies tooth decay affecting a pit or fissure surface and limited to the enamel. Use it when documentation shows early caries without dentin involvement.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include a visible pit or fissure lesion, enamel demineralization, or a white spot/cavitated area confined to enamel.
When to use this code
Use this code when the dentist documents caries on a pit or fissure surface and specifies enamel-only involvement. It fits early occlusal decay before deeper tooth structure is affected. If the record does not clearly state enamel limitation, check documentation.
Do not use for
Do not use K02.51 when decay extends into dentin or when the surface involved is not pit and fissure. If the note is nonspecific or conflicts with the exam, check documentation.
Coding tip
Confirm both site and depth: pit/fissure surface plus enamel-only involvement must be documented before assigning K02.51.