ICD-10 Code H18.31 – Folds and rupture in Bowman’s membrane (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.31 – Folds and rupture in Bowman’s membrane
What it is
H18.31 identifies folds or a rupture in Bowman’s membrane, the thin layer of the cornea. Use it when documentation specifically names this corneal finding.
Clinical signs
Findings may include corneal irregularity, reduced visual clarity, or slit-lamp evidence of Bowman’s membrane damage. Clinical features vary; refer to documentation.
When to use this code
Use H18.31 when the record clearly states folds, rupture, or both in Bowman’s membrane. It fits ophthalmology notes, exam findings, or problem lists that document this exact corneal abnormality. Check documentation if the note only describes a nonspecific corneal disorder.
Do not use for
Do not use this code for general corneal scarring, edema, or injuries that do not mention Bowman’s membrane. If the diagnosis is broader or unclear, check documentation.
Coding tip
Code only when Bowman’s membrane is explicitly documented; otherwise choose the more specific confirmed corneal diagnosis.