ICD-10 Code C69.12 – Malignant neoplasm of left cornea (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C69.12 – Malignant neoplasm of left cornea
What it is
C69.12 identifies a malignant tumor arising in the left cornea, the clear front surface of the left eye. Use it when the record specifically documents cancer of that site.
Clinical signs
Clinical features vary; refer to documentation. Commonly, corneal malignancy may be noted as a visible lesion, surface opacity, or abnormal growth on the left cornea confirmed by exam or biopsy.
When to use this code
Use C69.12 when the provider documents primary malignant neoplasm of the left cornea. It may also apply when pathology, operative notes, or ophthalmology assessments clearly localize the cancer to that exact site. Check documentation if laterality or primary site is unclear.
Do not use for
Do not use this code for benign corneal lesions, corneal scarring, or unspecified eye cancers. If the record does not confirm malignancy or left corneal origin, check documentation.
Coding tip
Verify both malignancy and laterality in the source note before assigning C69.12.