ICD-10 Code K08.491 – Partial loss of teeth due to other specified cause, class I (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K08.491 – Partial loss of teeth due to other specified cause, class I
What it is
This code identifies partial loss of teeth caused by a documented reason other than common categories such as caries, periodontal disease, or trauma. “Class I” specifies the extent of tooth loss as defined in the record.
Clinical signs
Patients may have missing teeth, altered chewing, or visible gaps in the dentition. Clinical features vary; refer to documentation for the exact cause and the extent of partial tooth loss.
When to use this code
Use K08.491 when the provider documents partial tooth loss from another specified cause and identifies the loss as class I. Apply it when the chart supports a nonstandard etiology and the classification of tooth loss is clear.
If the cause is not stated, or if the record describes complete edentulism, choose another code. Check documentation before assigning this code.
Do not use for
Do not use this code for tooth loss due to caries, periodontal disease, or injury unless the record specifically supports another cause. Do not use it when the extent or class of loss is not documented.
Coding tip
Confirm both the cause and the “class I” designation in the note before coding.