ICD-10 Code H50.021 – Monocular esotropia with A pattern, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.021 – Monocular esotropia with A pattern, right eye
What it is
This code identifies inward deviation of the right eye that changes in an A pattern, meaning the misalignment is greater in upgaze than downgaze. It is used when the esotropia affects one eye only.
Clinical signs
Typical findings include constant or intermittent inward turning of the right eye and a vertical change in deviation with gaze position. Clinical features vary; refer to documentation.
When to use this code
Use H50.021 when the provider documents monocular esotropia of the right eye with an A-pattern deviation. Apply it for ophthalmology notes, exam findings, or specialist assessments that clearly identify the right eye and the pattern. Check documentation if laterality or pattern is not explicit.
Do not use for
Do not use this code for unspecified esotropia, alternating esotropia, or A-pattern deviations that are not documented as monocular. If the eye or pattern is unclear, check documentation.
Coding tip
Confirm both laterality and the A-pattern before assigning H50.021.