Inferior oblique muscle entrapment, left eye

This diagnosis code signifies a condition where the inferior oblique muscle of the left eye becomes physically trapped, often due to trauma such as an orbital fracture. This entrapment restricts the muscle's movement, leading to impaired ocular motility and potentially diplopia (double vision) or gaze restriction.

Apply this code when documentation explicitly states entrapment of the inferior oblique muscle affecting the left eye. This is commonly seen following orbital trauma, particularly blow-out fractures, where orbital contents can herniate into adjacent sinuses. Supporting documentation includes imaging reports (CT scans) confirming muscle incarceration and ophthalmological examination findings detailing restricted eye movement.

• Ensure the documentation specifies "entrapment" and not just paresis or paralysis, which are distinct conditions.
• Verify laterality; this code is specific to the left eye.
• Consider sequencing this code after any traumatic injury code (e.g., orbital fracture) if the entrapment is a direct result of the trauma.