Coloboma of iris

This code represents a congenital anomaly characterized by a keyhole-shaped defect or gap in the iris, the colored part of the eye. This defect results from incomplete closure of the optic fissure during fetal development, leading to an absence of iris tissue. It can affect one or both eyes and may be isolated or associated with other ocular or systemic abnormalities.

Use this code when documentation specifies a diagnosis of coloboma affecting the iris. This diagnosis is typically made during an ophthalmologic examination, often in infancy or early childhood. Supporting documentation should clearly indicate the location of the coloboma as being within the iris.

• Do not confuse with coloboma of other ocular structures (e.g., retina, choroid, optic nerve), which have distinct codes.
• Code laterality (right, left, bilateral) if specified in the documentation.
• Consider additional codes for any associated ocular or systemic conditions, such as microphthalmia or CHARGE syndrome, if present.