ICD-10 Code K02.62 – Dental caries on smooth surface penetrating into dentin (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K02.62 – Dental caries on smooth surface penetrating into dentin
What it is
This code identifies tooth decay on a smooth tooth surface that has progressed through enamel into dentin. Use it when documentation shows a smooth-surface carious lesion with dentinal involvement.
Clinical signs
Findings may include visible cavitation, discoloration, or softness on a smooth surface, with evidence that decay extends into dentin. Clinical features vary; refer to documentation.
When to use this code
Use K02.62 when the dentist or provider documents smooth-surface caries penetrating dentin, such as on buccal, lingual, or interproximal smooth surfaces. It is appropriate when the record clearly distinguishes this from pit-and-fissure decay or from caries limited to enamel. Check documentation if the surface or depth is unclear.
Do not use for
Do not use this code for caries limited to enamel or for pit-and-fissure lesions. If the note does not specify smooth surface or dentinal penetration, check documentation.
Coding tip
Match the documented surface and depth exactly; both elements matter for correct code selection.