ICD-10 Code H50.641 – Lateral rectus muscle entrapment, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.641 – Lateral rectus muscle entrapment, right eye
What it is
This code identifies entrapment of the lateral rectus muscle in the right eye. It means the eye muscle is mechanically trapped, usually limiting normal eye movement.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include restricted right eye abduction, diplopia, and pain or discomfort with eye movement.
When to use this code
Use this code when the provider documents lateral rectus muscle entrapment specifically in the right eye. It may appear after orbital trauma, fracture repair, or other mechanical causes affecting eye movement. You should code it only when the right-sided location is clearly stated.
Do not use for
Do not use this code for unspecified eye muscle entrapment or for left-sided involvement. Check documentation if the record describes strabismus, paresis, or another motility disorder instead.
Coding tip
Always verify laterality and the exact muscle named in the chart before assigning H50.641.