ICD-10 Code H02.231 – Paralytic lagophthalmos right upper eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H02.231 – Paralytic lagophthalmos right upper eyelid
What it is
This code identifies paralysis-related inability to fully close the right upper eyelid. It is used when the eyelid does not close because of nerve or muscle dysfunction, not because of swelling or a structural eyelid defect.
Clinical signs
Typical findings include incomplete eyelid closure, visible sclera on attempted blinking, and exposure of the eye surface. Clinical features vary; refer to documentation for the cause and laterality.
When to use this code
Use H02.231 when the record specifically documents paralytic lagophthalmos affecting the right upper eyelid. This may appear in notes describing facial nerve palsy, postoperative weakness, or other neurologic impairment with right-sided eyelid closure failure. Code only when the laterality and paralytic nature are clear.
Do not use for
Do not use this code for mechanical eyelid closure problems, ptosis, or unspecified lagophthalmos. If the documentation does not confirm the right upper eyelid or the cause is unclear, check documentation.
Coding tip
Confirm both laterality and paralytic etiology in the chart before assigning H02.231.