ICD-10 Code K02.6 – Dental caries on smooth surface (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K02.6 – Dental caries on smooth surface
What it is
K02.6 identifies tooth decay that affects the smooth surfaces of the teeth, such as the sides or front/back surfaces. It is used when documentation specifically states smooth-surface caries.
Clinical signs
Clinical findings may include visible enamel breakdown, white-spot lesions, or cavitation on smooth tooth surfaces. Clinical features vary; refer to documentation.
When to use this code
Use K02.6 when the record clearly documents dental caries limited to smooth surfaces rather than pits, fissures, or root surfaces. You should also use it when the dentist or clinician specifies smooth-surface decay in the assessment, exam, or procedure note.
Do not use for
Do not use this code for caries on pit and fissure surfaces, root caries, or unspecified dental decay. Check documentation if the surface type is not stated.
Coding tip
Code K02.6 only when the tooth surface is explicitly identified as smooth; otherwise, query or code the documented type.