Superior oblique muscle entrapment, left eye

This code signifies a condition where the superior oblique muscle of the left eye is restricted in its movement, often due to scar tissue, inflammation, or structural abnormalities. This entrapment can lead to diplopia (double vision), strabismus (misalignment of the eyes), and impaired ocular motility. Patients may experience difficulty looking down and in with the affected eye.

Apply this code when documentation clearly indicates entrapment or restriction of the superior oblique muscle specifically affecting the left eye. This diagnosis is typically supported by ophthalmological examination findings, such as limited depression and intorsion of the left eye, positive forced duction tests, or imaging studies revealing muscle tethering.

• Ensure laterality is precisely documented as "left eye" to support this specific code.
• Distinguish from other superior oblique dysfunctions like paresis or paralysis, which have different codes.
• Look for documentation of the underlying cause of entrapment if known, as additional codes may be warranted.