ICD-10 Code H50.621 – Inferior oblique muscle entrapment, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.621 – Inferior oblique muscle entrapment, right eye
What it is
This code identifies entrapment of the inferior oblique muscle in the right eye. It indicates a mechanical restriction affecting eye movement, usually documented after orbital injury or surgery.
Clinical signs
Typical findings include restricted ocular motility, pain with eye movement, and diplopia. Clinical features vary; refer to documentation for the specific operative or trauma-related evidence.
When to use this code
Use this code when the provider documents inferior oblique muscle entrapment specifically in the right eye. It is appropriate for confirmed mechanical entrapment, often described on exam, imaging, or during surgery. Code the condition only when laterality and muscle involvement are clearly stated.
Do not use for
Do not use it for unspecified ocular muscle entrapment, left eye involvement, or general strabismus without documented entrapment. Check documentation if the note does not identify the right inferior oblique muscle.
Coding tip
Verify both the muscle and laterality in the provider note before assigning H50.621.