Pupillary membranes, left eye

This code describes the presence of persistent pupillary membranes in the left eye. These are remnants of the tunica vasculosa lentis, a fetal vascular network that normally atrophies before birth, appearing as fine strands of tissue extending from the iris collarette across the pupil.

Apply this code when documentation specifically identifies persistent pupillary membranes affecting the left eye. This condition is often an incidental finding during a routine ophthalmic examination. Documentation should clearly state "pupillary membranes" and specify the laterality.

• Ensure laterality is accurately documented and coded (left, right, or bilateral).
• Do not confuse with synechiae (adhesions of the iris), which are acquired and typically inflammatory in origin.
• Code only if the membranes are persistent and clinically noted, even if asymptomatic.