ICD-10 Code H18.13 – Bullous keratopathy, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.13 – Bullous keratopathy, bilateral
What it is
Bullous keratopathy, bilateral is corneal swelling in both eyes that leads to blister-like epithelial bullae. It usually reflects endothelial dysfunction and reduced corneal clarity.
Clinical signs
Common findings include corneal edema, reduced vision, pain, tearing, and light sensitivity. Clinical features vary; refer to documentation.
When to use this code
Use H18.13 when the provider documents bullous keratopathy affecting both corneas. Code it when the diagnosis is confirmed in the assessment, problem list, or operative note. If the record only says corneal edema without bullous keratopathy, check documentation.
Do not use for
Do not use this code for unilateral bullous keratopathy or for nonspecific corneal edema alone. Check documentation if the laterality is not clearly stated.
Coding tip
Confirm bilateral involvement before assigning H18.13, and code the documented laterality exactly as recorded.