ICD-10 Code C69.1 – Malignant neoplasm of cornea (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C69.1 – Malignant neoplasm of cornea
What it is
This code identifies a malignant tumor arising in the cornea, the clear front surface of the eye. Use it when the record documents primary cancer of the cornea.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a visible corneal mass, surface irregularity, or progressive ocular irritation, but the diagnosis must be confirmed by the provider.
When to use this code
Use C69.1 when the clinician documents malignant neoplasm of the cornea, including pathology or ophthalmology notes that specify the site. Apply it for confirmed primary corneal cancer, not for suspected disease. If the chart only says “eye cancer” or gives an uncertain site, check documentation.
Do not use for
Do not use this code for benign corneal lesions, inflammatory corneal disorders, or cancers limited to other eye structures. If the record identifies a different ocular site, select the more specific code.
Coding tip
Verify that the cornea is named as the primary malignant site before assigning C69.1.