Folds and rupture in Bowman's membrane, unspecified eye

This code describes a structural abnormality of the cornea involving folds and/or a rupture in Bowman's layer, a strong, acellular membrane located between the corneal epithelium and stroma. These defects can lead to corneal opacities and visual disturbances.

Use this code when documentation specifies folds or a rupture in Bowman's membrane without further detail regarding the specific eye affected. This diagnosis is often made during slit-lamp examination. Supporting documentation should clearly state the presence of these specific corneal findings.

• This code is for an unspecified eye; if the laterality (right or left eye) is documented, use the more specific codes H18.311 (right eye) or H18.312 (left eye).
• Do not confuse this with other corneal dystrophies or degenerations unless Bowman's membrane involvement is explicitly stated.
• Ensure the physician's notes clearly identify the affected corneal layer as Bowman's membrane.