ICD-10 Code C41.0 – Malignant neoplasm of bones of skull and face (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C41.0 – Malignant neoplasm of bones of skull and face
What it is
C41.0 identifies a malignant tumor arising in the bones of the skull or face. Use it when the record documents primary cancer in these bones, not a skin, soft tissue, or metastatic lesion.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include a mass, localized pain, swelling, deformity, or imaging evidence of an aggressive bone lesion in the skull or facial bones.
When to use this code
Use C41.0 when the provider states malignant neoplasm of the skull bones or facial bones, or documents a primary bone cancer at that site. It is also appropriate when pathology or imaging clearly supports that location. Check documentation if the site is unclear.
Do not use for
Do not use this code for metastatic disease to the skull or face, or for cancers of the skin, salivary glands, or soft tissues in the same area. Verify the anatomic origin before assigning the code.
Coding tip
Confirm whether the tumor is primary, metastatic, or contiguous spread before coding C41.0.