ICD-10 Code H02.521 – Blepharophimosis right upper eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H02.521 – Blepharophimosis right upper eyelid
What it is
Use this code for a narrowed horizontal opening of the right upper eyelid, usually due to congenital or structural eyelid abnormality. It describes the eyelid finding itself, not the cause.
Clinical signs
Typical findings include a visibly shortened palpebral fissure and a tight, small-appearing upper eyelid on the right. Clinical features vary; refer to documentation.
When to use this code
Assign H02.521 when the provider documents blepharophimosis limited to the right upper eyelid. Use it for congenital or acquired eyelid narrowing if the note clearly identifies the right upper lid.
Do not infer laterality from general eyelid asymmetry or ptosis alone. If the record is unclear, check documentation before coding.
Do not use for
Do not use this code for ptosis, general eyelid malposition, or blepharophimosis affecting both lids or the opposite side. Check documentation if the exact eyelid is not specified.
Coding tip
Confirm laterality and the exact eyelid named in the assessment before assigning H02.521.