ICD-10 Code H50.121 – Monocular exotropia with A pattern, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.121 – Monocular exotropia with A pattern, right eye
What it is
H50.121 identifies outward deviation of the right eye with an A-pattern strabismus. Use it when the right eye turns outward and the misalignment changes in an A-shaped pattern with gaze direction.
Clinical signs
Typical findings include constant or intermittent right-eye exotropia and a pattern where the deviation increases in upgaze or decreases in downgaze. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents monocular exotropia of the right eye with A-pattern alignment. It fits ophthalmology or pediatric eye exams that specifically identify the eye involved and the pattern type. Check documentation if laterality or pattern is unclear.
Do not use for
Do not use this code for exotropia without documented A-pattern, or for left-eye, bilateral, or unspecified strabismus. Do not assume the pattern from general misalignment notes.
Coding tip
Verify both laterality and pattern in the assessment; if either is missing, query the provider before coding.