Iris atrophy (essential) (progressive), left eye

This diagnosis code signifies a degenerative condition affecting the iris of the left eye, characterized by the progressive thinning and loss of iris tissue. This atrophy can lead to changes in pupil shape, transillumination defects, and potentially secondary glaucoma due to pigment dispersion or angle closure. It specifically refers to essential or progressive forms of iris atrophy.

Apply this code when documentation clearly indicates a diagnosis of essential or progressive iris atrophy affecting the patient's left eye. Supporting clinical findings may include slit lamp examination revealing iris stromal thinning, pigment dispersion, or abnormal pupil morphology in the left eye. This code is appropriate when the atrophy is not secondary to trauma, inflammation, or other identifiable causes.

• Ensure laterality is explicitly documented as "left eye" to support this specific code.
• Differentiate from iris atrophy secondary to other conditions (e.g., post-traumatic, post-inflammatory), which would require different codes.
• Consider co-reporting with codes for associated conditions like glaucoma if present and documented.