ICD-10 Code H50.651 – Medial rectus muscle entrapment, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.651 – Medial rectus muscle entrapment, right eye
What it is
Use this code for entrapment of the right medial rectus muscle, where the muscle is mechanically trapped and cannot move normally. It is typically documented as a specific orbital or extraocular muscle injury.
Clinical signs
Findings may include restricted right eye movement, pain with gaze, diplopia, or abnormal ocular alignment. Clinical features vary; refer to documentation.
When to use this code
Assign H50.651 when the provider documents medial rectus muscle entrapment in the right eye, usually after trauma or an orbital fracture. Use it when the record clearly identifies the right side and the specific muscle involved. Check documentation if laterality or the exact structure is unclear.
Do not use for
Do not use this code for generic strabismus, nonspecific eye muscle weakness, or left-sided entrapment. If the note does not confirm right medial rectus involvement, check documentation.
Coding tip
Verify both laterality and the named muscle in the operative or imaging report before assigning H50.651.