Alternating esotropia with A pattern

This code describes a type of strabismus where one eye turns inward (esotropia) and the deviation alternates between the left and right eye. The "A pattern" indicates that the esotropia is greater in upgaze than in downgaze, meaning the inward turning of the eye is more pronounced when looking up.

Use this code for patients diagnosed with alternating esotropia that exhibits an A-pattern deviation. Documentation should clearly specify both the alternating nature of the esotropia and the presence of an A-pattern, often noted during ocular motility examinations. This code is appropriate when the physician explicitly identifies these characteristics.

• Ensure documentation specifies "alternating" esotropia; codes exist for monocular esotropia.
• Verify the presence of an "A pattern" as opposed to a "V pattern" or no pattern, as these have different codes.
• Do not confuse with intermittent esotropia unless the alternating nature is also documented.