Superior rectus muscle entrapment, unspecified eye

This code describes a condition where the superior rectus muscle of the eye is physically restricted or "trapped," leading to impaired eye movement. This entrapment typically results from trauma, such as an orbital fracture, or from surgical complications, causing mechanical restriction rather than neurological dysfunction. The unspecified laterality indicates that the medical record does not specify which eye is affected.

Use this code when documentation clearly indicates superior rectus muscle entrapment without specifying the affected eye. This often occurs in cases of orbital trauma where imaging or clinical examination confirms muscle restriction but the laterality is not explicitly stated. Supporting documentation should describe limited elevation or other specific motility deficits attributed to mechanical restriction of the superior rectus.

• Do not use this code if the medical record specifies the affected eye (e.g., right or left); instead, use the more specific H50.671 or H50.672.
• Ensure documentation differentiates entrapment from paresis or paralysis, which would be coded differently (e.g., H49.xx for paralytic strabismus).
• Always look for an underlying cause, such as an orbital fracture (S02.1xx), and code it as a primary diagnosis if applicable, with the entrapment as a secondary diagnosis.