Lateral rectus muscle entrapment, right eye

This code signifies a condition where the right lateral rectus muscle, responsible for outward movement of the eye, becomes trapped or restricted. This entrapment can lead to impaired eye movement, double vision (diplopia), and pain. It often results from trauma, such as an orbital fracture, or surgical complications.

Apply this code when documentation explicitly states entrapment of the lateral rectus muscle affecting the right eye. This diagnosis is typically supported by imaging studies (e.g., CT scan, MRI) demonstrating muscle impingement and clinical findings of restricted abduction of the right eye.

• Ensure laterality is clearly documented as "right eye" to support this specific code.
• Distinguish from muscle paresis or paralysis (H49.xx) where the muscle is weak but not physically entrapped.
• Consider sequencing this code after any underlying cause, such as an orbital fracture (S02.1xx), if applicable.