ICD-10 Code H50.632 – Inferior rectus muscle entrapment, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.632 – Inferior rectus muscle entrapment, left eye
What it is
This code identifies entrapment of the inferior rectus muscle in the left eye, usually after orbital trauma or fracture. It means the muscle is mechanically trapped, which can limit eye movement.
Clinical signs
Common findings include restricted upgaze, diplopia, and pain with eye movement. Clinical features vary; refer to documentation for imaging or exam evidence of left inferior rectus involvement.
When to use this code
Use this code when the record specifically documents inferior rectus muscle entrapment in the left eye. It is appropriate for confirmed traumatic orbital injury, especially when exam or imaging supports muscle incarceration. Code the laterality exactly as documented.
Do not use for
Do not use it for general eye muscle weakness, nonspecific diplopia, or orbital fracture without documented entrapment. Check documentation if the note only mentions suspected restriction.
Coding tip
Verify laterality and the word “entrapment” in the provider note before assigning H50.632.