Scleral ectasia, left eye

This code describes an abnormal thinning and bulging of the sclera, the white outer layer of the left eye, that is not due to staphyloma. This ectasia indicates a localized or generalized weakening of the scleral tissue, which can lead to visual disturbances or other ocular complications.

Use this code when documentation specifies scleral ectasia affecting the left eye, without mention of staphyloma. This typically arises from congenital conditions, inflammatory processes, or trauma. Supporting documentation should clearly indicate the affected eye and rule out staphyloma.

• Ensure the documentation specifies "ectasia" and not "staphyloma" for the left eye.
• Do not confuse with H15.841 (right eye) or H15.843 (bilateral).
• Code any underlying cause of the scleral ectasia, if known and documented, as an additional diagnosis.