Miotic pupillary cyst, unspecified eye

This code describes a benign, fluid-filled sac located on the iris, specifically within the pupillary margin, that is not further specified as to laterality. These cysts are typically congenital but can also be acquired, often appearing as small, dark lesions. They generally do not cause significant visual impairment unless they grow large enough to obstruct the pupil.

Use this code when documentation indicates the presence of a miotic pupillary cyst without specifying whether it affects the right or left eye. This code is appropriate when the physician's notes confirm the diagnosis of a pupillary cyst and do not provide laterality information. It is also used when the cyst is an incidental finding during an eye examination.

• Only use this code when laterality (right or left eye) is explicitly unspecified in the medical record.
• Avoid using this code if the documentation clearly states the affected eye; instead, select the more specific H21.271 (right eye) or H21.272 (left eye).
• Ensure the documentation differentiates a miotic pupillary cyst from other iris cysts (e.g., H21.26- for other cysts of iris and ciliary body).