ICD-10 Code H02.42 – Myogenic ptosis of eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H02.42 – Myogenic ptosis of eyelid
What it is
Myogenic ptosis is drooping of the upper eyelid caused by a problem in the eyelid muscle itself. It reflects weakened levator function rather than nerve injury or mechanical heaviness.
Clinical signs
Typical findings include a visibly low upper lid, reduced eyelid elevation, and possible asymmetry between the eyes. Clinical features vary; refer to documentation.
When to use this code
Use H02.42 when the provider documents ptosis due to a myogenic cause, such as a muscle disorder affecting eyelid lifting. Apply it when the record clearly identifies the condition as myogenic ptosis, not neurologic, traumatic, or mechanical ptosis. Check documentation if the cause is not specified.
Do not use for
Do not use this code for ptosis caused by nerve palsy, trauma, or excess eyelid tissue. If the chart does not support a myogenic cause, choose the documented etiology instead.
Coding tip
Confirm that the note explicitly links ptosis to a myogenic cause before assigning H02.42.