Degeneration of iris (pigmentary), left eye

This code describes a specific type of iris degeneration affecting the left eye, characterized by pigment dispersion. This condition often involves the shedding of pigment granules from the iris, which can then deposit in other parts of the eye, potentially leading to pigmentary glaucoma.

Use this code when documentation specifies pigmentary degeneration of the iris in the patient's left eye. This is typically diagnosed during an ophthalmological examination, often noting transillumination defects of the iris or pigment deposition on the corneal endothelium.

• Ensure the documentation clearly specifies "pigmentary" degeneration to differentiate from other types of iris atrophy.
• Verify laterality; this code is specific to the left eye.
• Consider co-reporting with a glaucoma code (e.g., H40.132 for pigmentary glaucoma, left eye) if the patient has developed elevated intraocular pressure or optic nerve damage due to the pigment dispersion.