Degeneration of pupillary margin, left eye

This code describes a degenerative change affecting the pupillary margin of the left eye. This typically involves a breakdown or deterioration of the iris tissue specifically around the pupil, which can sometimes be associated with conditions like pigment dispersion syndrome or glaucoma.

Use this code when documentation specifies degeneration of the pupillary margin, explicitly noting the left eye. This diagnosis is often made during a slit lamp examination revealing atrophy or structural changes at the pupillary border.

• Ensure the laterality (left eye) is clearly documented; do not use for bilateral or unspecified cases.
• Distinguish from other iris degenerations (e.g., H21.21- for atrophy of iris) that do not specifically involve the pupillary margin.
• Consider co-reporting with codes for underlying causes such as glaucoma or pigment dispersion syndrome, if applicable and documented.