ICD-10 Code H18.731 – Descemetocele, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.731 – Descemetocele, right eye
What it is
Descemetocele of the right eye means the cornea has thinned so severely that Descemet’s membrane is exposed. You code this when documentation specifies the right eye and the lesion is a descemetocele.
Clinical signs
Clinical features may include a deep corneal ulcer, marked stromal thinning, and a visible bulging or translucent membrane at the thinnest point. Clinical features vary; refer to documentation.
When to use this code
Use H18.731 when the provider documents a descemetocele in the right eye, including corneal thinning severe enough to expose Descemet’s membrane. It may appear in notes describing corneal ulcer complications or impending perforation. Check documentation if the laterality is unclear.
Do not use for
Do not use this code for a simple corneal ulcer, corneal abrasion, or nonspecific keratitis without descemetocele documentation. If the eye is not identified as right, use the appropriate laterality code.
Coding tip
Confirm both the diagnosis and laterality in the ophthalmology note before assigning H18.731.