Retained (old) magnetic fb in iris or ciliary body, left eye

This code signifies the presence of an old, non-biologic magnetic foreign object embedded within the iris or ciliary body of the patient's left eye. "Old" implies the foreign body has been present for an extended, unspecified duration, distinguishing it from an acute or recent injury. The magnetic nature of the foreign body is a specific characteristic.

Use this code when documentation clearly indicates a magnetic foreign body, previously lodged and still present, within the iris or ciliary body of the left eye. This typically follows a history of ocular trauma or penetration where the object was not immediately removed. Imaging studies (e.g., MRI, X-ray) confirming the object's presence and location, along with a physician's assessment of its "retained" and "old" status, support its use.

• Differentiate "retained (old)" from "retained (current)" or "retained (unspecified)" foreign bodies, which have distinct codes.
• Ensure the documentation specifies the foreign body's magnetic nature; otherwise, use a code for a nonmagnetic foreign body.
• Verify the laterality (left eye) is explicitly stated in the medical record.