ICD-10 Code H02.23 – Paralytic lagophthalmos (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H02.23 – Paralytic lagophthalmos
What it is
H02.23 identifies incomplete eyelid closure caused by facial nerve weakness or paralysis. The eye may not close fully at rest or during sleep, leaving the cornea exposed.
Clinical signs
Look for lagophthalmos with reduced blink strength, facial asymmetry, and exposure-related eye irritation. Clinical features vary; refer to documentation.
When to use this code
Use H02.23 when the record documents paralytic inability to close the eyelids, usually linked to facial nerve dysfunction. Apply it for unilateral or bilateral cases if the provider specifies paralytic lagophthalmos. Do not infer paralysis from nonspecific eye redness alone.
Do not use for
Do not use this code for mechanical eyelid closure problems, cosmetic eyelid disorders, or simple dry eye without paralysis. Check documentation if the cause of incomplete closure is unclear.
Coding tip
Code the underlying facial nerve disorder separately when documented, and confirm laterality if the chart supports it.