Vertical strabismus, left eye

This code describes a condition where the left eye is misaligned vertically, meaning it deviates either upward (hypertropia) or downward (hypotropia) relative to the right eye. This misalignment can be constant or intermittent and may lead to symptoms such as diplopia, asthenopia, or compensatory head postures.

Assign this code when documentation clearly indicates a diagnosis of vertical strabismus affecting the left eye. This diagnosis is typically made by an ophthalmologist or optometrist based on clinical examination findings, including cover-uncover tests, prism measurements, and assessment of ocular motility.

• Differentiate from horizontal strabismus (esotropia/exotropia) and cyclovertical strabismus.
• Ensure the laterality (left eye) is explicitly documented to support this specific code.
• Consider co-occurring conditions, such as amblyopia or diplopia, and code them separately if present and documented.