ICD-10 Code H18.732 – Descemetocele, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.732 – Descemetocele, left eye
What it is
Descemetocele of the left eye means the cornea has become extremely thin, with only Descemet membrane remaining intact. It represents a severe corneal injury or ulcer complication and signals a high risk of perforation.
Clinical signs
Clinical features may include a deep corneal defect, marked thinning, and a dark or bulging appearance over the affected area. Clinical features vary; refer to documentation.
When to use this code
Use H18.732 when the provider documents a descemetocele specifically in the left eye. This code fits ophthalmology notes describing advanced corneal thinning, especially when the diagnosis is confirmed on exam or slit-lamp findings. Check documentation if laterality is unclear.
Do not use for
Do not use this code for general corneal ulcer, superficial abrasion, or unspecified corneal thinning without a documented descemetocele. If the eye is not identified as left, select the correct laterality code or check documentation.
Coding tip
Always verify laterality and the exact term “descemetocele” before assigning H18.732.