ICD-10 Code H02.23B – Paralytic lagophthalmos left eye, upper and lower eyelids (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H02.23B – Paralytic lagophthalmos left eye, upper and lower eyelids
What it is
This code identifies paralysis-related inability to close the left eyelid fully, involving both the upper and lower lids. It reflects lagophthalmos on the left side rather than a general eyelid disorder.
Clinical signs
Look for incomplete eyelid closure on the left, especially when the patient tries to blink or sleep. Documentation may note exposure symptoms, eye dryness, or visible gap between the lids; clinical features vary, refer to documentation.
When to use this code
Use H02.23B when the record specifically states paralytic lagophthalmos of the left eye affecting both upper and lower eyelids. You should code it when the provider links the eyelid closure problem to paralysis, facial nerve dysfunction, or another documented neurologic cause.
Choose this code only when laterality and lid involvement are clearly documented. If the note says only lagophthalmos, or does not specify the left eye, check documentation before assigning the code.
Do not use for
Do not use this code for mechanical eyelid closure problems, trauma without paralysis, or unspecified lagophthalmos. Also avoid it when the record does not confirm left-sided involvement and both eyelids.
Coding tip
Verify the exact laterality and that paralysis is documented before coding; if the chart is vague, check documentation.