Monocular esotropia with A pattern, right eye

This code describes a form of strabismus where the right eye deviates inward (esotropia) and the deviation significantly increases on upward gaze and decreases on downward gaze, characteristic of an "A" pattern. This condition is typically constant and affects only one eye.

Apply this code when documentation clearly indicates a diagnosis of monocular esotropia specifically affecting the right eye, with the presence of an "A" pattern deviation. This is often diagnosed during an ophthalmic examination involving prism and cover testing in various gaze positions.

• Ensure documentation specifies "monocular" and laterality (right eye) to differentiate from bilateral or alternating esotropia.
• Confirm the presence of an "A" pattern, as other patterns (e.g., "V" pattern) are coded differently.
• Do not confuse with intermittent esotropia (H50.03-) or other forms of strabismus without the "A" pattern.