ICD-10 Code D31.12 – Benign neoplasm of left cornea (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D31.12 – Benign neoplasm of left cornea
What it is
D31.12 identifies a noncancerous growth of the left cornea. Use it when documentation specifies a benign neoplasm involving that eye’s corneal tissue.
Clinical signs
Clinical features vary; refer to documentation. A corneal lesion may be described on exam, often with localized opacity, elevation, or a visible mass, but the record should support benign behavior and left-sided location.
When to use this code
Use D31.12 when the provider documents a benign neoplasm of the left cornea, including a confirmed corneal tumor or mass without malignant behavior. It may also apply when pathology or specialist assessment identifies the lesion as benign and specifically left-sided. Check documentation if the site is recorded only as ocular or corneal.
Do not use for
Do not use this code for malignant, uncertain, or metastatic eye lesions. Do not use it when the documentation names a different corneal disorder, such as inflammation, ulcer, or scar.
Coding tip
Verify both laterality and benign nature in the note before assigning D31.12.