ICD-10 Code C05.9 – Malignant neoplasm of palate, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C05.9 – Malignant neoplasm of palate, unspecified
What it is
C05.9 identifies a malignant tumor of the palate when the exact site is not documented. Use it for cancer involving the hard or soft palate if the record does not specify a more precise location.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include an oral mass, ulceration, pain, bleeding, or difficulty with speech or swallowing, but you should code only what is documented.
When to use this code
Use this code when the provider documents malignant neoplasm of the palate without further detail. It also fits when the note confirms palate cancer but does not distinguish hard from soft palate or another specific subsite.
If later documentation names a more specific palatal site, assign the more specific code instead. Check documentation for primary versus secondary malignancy and for any additional sites involved.
Do not use for
Do not use C05.9 when the record identifies a specific palatal subsite, such as hard palate or soft palate. Do not use it for benign, in situ, or metastatic disease unless the documentation supports that diagnosis.
Coding tip
Query the provider if the pathology or operative note gives a more precise palatal location than the assessment.