ICD-10 Code H18.212 – Corneal edema secondary to contact lens, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.212 – Corneal edema secondary to contact lens, left eye
What it is
This code identifies corneal swelling in the left eye caused by contact lens wear. Use it when the documentation clearly states the edema is secondary to a contact lens.
Clinical signs
Typical findings include a swollen or hazy cornea, blurred vision, and ocular discomfort. Clinical features vary; refer to documentation.
When to use this code
Use H18.212 when the provider documents left corneal edema and links it to contact lens use. It fits cases where the contact lens is the stated cause, not just a concurrent finding. If laterality or causation is unclear, check documentation.
Do not use for
Do not use this code for corneal edema without contact lens causation, or for right eye or bilateral disease. Do not assign it when the record only notes contact lens wear and corneal changes without a documented link.
Coding tip
Capture both the laterality and the causal relationship exactly as documented before assigning H18.212.