Miotic pupillary cyst, bilateral

This code describes the presence of a cyst on the iris margin, specifically one that causes the pupil to constrict (miosis). These cysts are typically benign and can be congenital or acquired, often resulting from inflammation or trauma.

Use this code when documentation clearly indicates a miotic pupillary cyst affecting both eyes. This diagnosis is typically made during an ophthalmological examination, often noted during slit-lamp biomicroscopy. Supporting documentation should specify the bilateral involvement and the miotic effect.

• Ensure the documentation explicitly states "bilateral" involvement; otherwise, use a code for unilateral or unspecified eye.
• Differentiate from other iris cysts (e.g., H21.4 for iris atrophy with cyst formation) or other pupillary abnormalities.
• Code any associated underlying conditions or complications, such as inflammation or glaucoma, separately.