ICD-10 Code K02.5 – Dental caries on pit and fissure surface (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K02.5 – Dental caries on pit and fissure surface
What it is
K02.5 identifies tooth decay limited to the pits and fissures of a tooth’s chewing surface. Use it when documentation specifies caries in those grooves rather than on smooth surfaces or root surfaces.
Clinical signs
Findings may include visible decay, discoloration, or cavitation in the occlusal grooves of posterior teeth. Clinical features vary; refer to documentation.
When to use this code
Use K02.5 when the dentist documents pit-and-fissure caries, including lesions on the chewing surface of molars or premolars. It also fits when the record clearly distinguishes this site from other caries locations. If the site is not documented, check documentation before coding.
Do not use for
Do not use this code for caries on smooth surfaces, root surfaces, or unspecified dental decay. If the record only says “caries” without location, choose the unspecified code instead.
Coding tip
Code the anatomic site exactly as documented; pit and fissure location is the key detail for K02.5.