ICD-10 Code K08.40 – Partial loss of teeth, unspecified cause (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K08.40 – Partial loss of teeth, unspecified cause
What it is
K08.40 identifies partial loss of teeth when the cause is not specified in the record. Use it for missing one or more teeth without enough detail to assign a more specific code.
Clinical signs
Findings commonly include absent teeth, gaps in the dental arch, or reduced dentition on exam. Clinical features vary; refer to documentation.
When to use this code
Use this code when the chart documents partial tooth loss but does not state trauma, periodontal disease, caries, or another cause. It fits encounters where the main documented problem is missing teeth and the etiology remains unclear. Check documentation if a more specific dental condition is recorded.
Do not use for
Do not use this code if the record identifies a specific cause of tooth loss, such as injury or disease. Do not use it for complete loss of all teeth.
Coding tip
Review the provider note for the cause of tooth loss before defaulting to K08.40.