ICD-10 Code K11.4 – Fistula of salivary gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K11.4 – Fistula of salivary gland
What it is
K11.4 identifies an abnormal connection involving a salivary gland or its duct, allowing saliva to drain through an unintended opening. It is used when the documentation specifically states a salivary gland fistula.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include persistent saliva leakage from a skin opening or oral site, especially after trauma, surgery, or infection involving a salivary gland.
When to use this code
Use K11.4 when the provider documents a fistula of a salivary gland or salivary duct. It may apply after gland injury, postoperative complications, or a chronic draining tract clearly identified as salivary in origin.
Code it only when the record supports the salivary source of the fistula. Check documentation if the note instead describes a general oral, cutaneous, or postoperative fistula without gland involvement.
Do not use for
Do not use this code for salivary gland swelling, infection, stones, or obstruction without a fistula. It is also inappropriate when the drainage source is unclear or another body system is documented.
Coding tip
Look for explicit wording such as “salivary fistula” or “fistula of salivary gland” before assigning K11.4.