ICD-10 Code H02.431 – Paralytic ptosis of right eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H02.431 – Paralytic ptosis of right eyelid
What it is
This code identifies drooping of the right upper eyelid caused by paralysis of the eyelid-lifting muscles or their nerve supply. It is used when the ptosis is specifically described as paralytic and affects the right side.
Clinical signs
Typical findings include a visibly low right eyelid, reduced palpebral fissure, and impaired eyelid elevation. Clinical features vary; refer to documentation for the underlying neurologic cause or associated eye findings.
When to use this code
Use H02.431 when the record states paralytic ptosis of the right eyelid, such as after a cranial nerve palsy or other documented nerve dysfunction. You may also use it when the provider documents right-sided paralytic eyelid droop without another more specific diagnosis. Check documentation if the cause is unclear.
Do not use for
Do not use this code for simple mechanical eyelid droop, congenital ptosis, or unspecified ptosis. If the chart does not clearly identify paralysis or the right side, check documentation.
Coding tip
Code the laterality exactly as documented, and link the ptosis to the underlying neurologic condition when the record supports it.