ICD-10 Code H49.31 – Total (external) ophthalmoplegia, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H49.31 – Total (external) ophthalmoplegia, right eye
What it is
This code identifies complete paralysis of the external eye muscles in the right eye. The eye cannot move normally because the muscles or their nerve supply are not functioning.
Clinical signs
Typical findings include marked limitation or absence of voluntary eye movement in the right eye. Patients may report double vision, drooping eyelid, or abnormal eye position; clinical features vary, refer to documentation.
When to use this code
Use H49.31 when the provider documents total external ophthalmoplegia limited to the right eye. It is appropriate for confirmed unilateral paralysis affecting extraocular movement, whether described as congenital, acquired, or due to another documented cause. Check documentation if laterality is unclear.
Do not use for
Do not use this code for general strabismus, isolated ptosis, or nonspecific eye movement complaints without documented ophthalmoplegia. If the condition affects both eyes or another side, select the correct laterality code.
Coding tip
Always verify laterality and whether the provider documented total versus partial ophthalmoplegia before assigning the code.