ICD-10 Code H50.65 – Medial rectus muscle entrapment (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.65 – Medial rectus muscle entrapment
What it is
This code identifies entrapment of the medial rectus muscle, usually meaning the muscle is mechanically trapped or restricted. It describes a specific ocular motility problem rather than a general eye injury.
Clinical signs
Typical findings include limited eye movement, especially impaired adduction, and possible diplopia. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents medial rectus muscle entrapment as the diagnosis. It may appear after orbital trauma, fracture, or surgical complication if the provider confirms the muscle is trapped. If documentation only says restricted eye movement, check documentation before assigning this code.
Do not use for
Do not use this code for nonspecific diplopia, general strabismus, or eye pain without documented entrapment. Do not assign it when the note describes another extraocular muscle or an unspecified orbital injury.
Coding tip
Code only when the provider documents medial rectus entrapment explicitly; otherwise, query or code the documented condition.