ICD-10 Code C69.6 – Malignant neoplasm of orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C69.6 – Malignant neoplasm of orbit
What it is
C69.6 identifies a malignant tumor arising in the orbit, the bony cavity that contains the eye and its supporting tissues. Use it when documentation states primary cancer of the orbit.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include proptosis, orbital mass, pain, diplopia, or vision changes, but the record must support the diagnosis.
When to use this code
Use C69.6 when the provider documents malignant neoplasm of the orbit, including a primary orbital cancer or a confirmed malignant orbital mass. Apply it only when the orbit is the documented site of origin. If the note is unclear about primary versus secondary disease, check documentation before coding.
Do not use for
Do not use this code for benign orbital lesions, inflammatory eye disorders, or unspecified eye tumors. If the malignancy is documented as metastatic to the orbit, code the primary site and secondary orbital involvement as directed.
Coding tip
Confirm laterality, primary site, and whether the orbital lesion is primary or secondary before assigning C69.6.