H50.63Inferior rectus muscle entrapment

H50.63 is the ICD-10-CM diagnosis code for inferior rectus muscle entrapment. It belongs to category H50 (other strabismus), block H49-H52 (disorders of ocular muscles, binocular movement, accommodation and refraction) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within H50.6 (mechanical strabismus), H50.63 is specifically for inferior rectus muscle entrapment. Related codes cover unspecified (H50.60), Brown's sheath syndrome (H50.61), inferior oblique muscle entrapment (H50.62), lateral rectus muscle entrapment (H50.64), medial rectus muscle entrapment (H50.65), superior oblique muscle entrapment (H50.66), superior rectus muscle entrapment (H50.67), extraocular muscle entrapment, unspecified (H50.68) and 1 more.

To report this condition, pick the subcode that matches the documentation: H50.631 (right eye), H50.632 (left eye) and H50.639 (unspecified eye).

It was added in FY2024, effective October 1, 2023.