ICD-10 Code H18.422 – Band keratopathy, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.422 – Band keratopathy, left eye
What it is
H18.422 identifies band keratopathy affecting the left eye. It means calcium deposits have formed in the cornea, creating a band-like opacity that can interfere with vision.
Clinical signs
Typical findings include a gray-white, horizontal or band-shaped corneal opacity, usually in the exposed interpalpebral area. Patients may report blurred vision, foreign-body sensation, or eye irritation; clinical features vary, refer to documentation.
When to use this code
Use this code when the record specifically documents band keratopathy in the left eye. It is appropriate for ophthalmology notes, exam findings, or problem lists that identify the left eye as the affected side.
If the documentation only says band keratopathy without laterality, do not assume this code. Confirm whether the condition is left, right, bilateral, or unspecified before coding.
Do not use for
Do not use H18.422 for corneal opacity from another cause, or when band keratopathy is documented in a different eye. Check documentation if laterality is missing or unclear.
Coding tip
Always match the code to the documented eye and avoid defaulting to left eye unless the provider states it explicitly.