Pupillary membranes, right eye

This code indicates the presence of persistent pupillary membranes in the right eye. These are remnants of the tunica vasculosa lentis, a fetal structure that normally atrophies before birth, appearing as fine strands of tissue extending from the iris collarette across the pupil. While often asymptomatic, they can occasionally impair vision.

Use this code when documentation specifies the diagnosis of pupillary membranes affecting the right eye. This typically occurs during an ophthalmological examination where the membranes are directly visualized. Supporting documentation should include findings from a slit lamp examination.

• Ensure the laterality (right eye) is clearly documented and matches the code.
• Do not confuse with iris synechiae, which are adhesions between the iris and other structures.
• If bilateral, a separate code for the left eye (H21.42) and unspecified eye (H21.49) would be used.