ICD-10 Code H50.661 – Superior oblique muscle entrapment, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.661 – Superior oblique muscle entrapment, right eye
What it is
H50.661 identifies entrapment of the superior oblique muscle in the right eye. Use it when documentation states the muscle is trapped, restricted, or mechanically limited on the right side.
Clinical signs
Typical findings include restricted eye movement and diplopia related to mechanical limitation. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents superior oblique muscle entrapment affecting the right eye, often after trauma or surgery. It may also apply when imaging or exam findings support a right-sided mechanical restriction involving that muscle. Check documentation if laterality is unclear.
Do not use for
Do not use this code for nonspecific strabismus, general ocular muscle weakness, or left-eye entrapment. If the record does not specify the superior oblique muscle and right eye, check documentation.
Coding tip
Verify both the muscle involved and laterality before assigning H50.661.