ICD-10 Code H18.442 – Keratomalacia, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.442 – Keratomalacia, left eye
What it is
Keratomalacia means softening and breakdown of the cornea in the left eye. It is a serious corneal condition that can threaten vision if not documented and managed promptly.
Clinical signs
Findings may include corneal clouding, ulceration, thinning, or a soft, irregular corneal surface. Clinical features vary; refer to documentation.
When to use this code
Use H18.442 when the provider specifically documents keratomalacia affecting the left eye. This code supports laterality and should match the charted diagnosis, not a general corneal disorder. If the record only states corneal degeneration or ulcer without keratomalacia, check documentation.
Do not use for
Do not use this code for keratomalacia of the right eye, both eyes, or unspecified eye. Do not assign it for other corneal ulcers or opacity diagnoses unless keratomalacia is clearly documented.
Coding tip
Verify both the diagnosis term and laterality in the ophthalmology note before coding H18.442.