ICD-10 Code K08.404 – Partial loss of teeth, unspecified cause, class IV (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K08.404 – Partial loss of teeth, unspecified cause, class IV
What it is
K08.404 identifies partial loss of teeth from an unspecified cause, with class IV severity. Use it when documentation confirms missing teeth but does not name the cause.
Clinical signs
Findings usually include one or more absent teeth and reduced dental arch continuity. Clinical features vary; refer to documentation for the exact extent of tooth loss and class assignment.
When to use this code
Use this code when the record states partial tooth loss and the cause is not documented or cannot be determined. It is appropriate for dental, oral surgery, or general medical notes that specify class IV. Verify the chart does not identify trauma, caries, periodontal disease, or another cause.
Do not use for
Do not use it when the missing teeth are fully edentulous or when a specific cause is documented and should be coded instead. Check documentation if the record only notes tooth extraction without stating partial loss.
Coding tip
Confirm both the “partial loss” wording and the class IV designation before assigning K08.404.