ICD-10 Code H01.021 – Squamous blepharitis right upper eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H01.021 – Squamous blepharitis right upper eyelid
What it is
H01.021 identifies squamous blepharitis affecting the right upper eyelid. It means inflammation of the eyelid margin with scaling or flaking at the lash line.
Clinical signs
Typical findings include eyelid redness, irritation, crusting, and visible scales on the eyelid margin. Clinical features vary; refer to documentation for laterality and whether the upper eyelid is specifically involved.
When to use this code
Use H01.021 when the provider documents squamous blepharitis limited to the right upper eyelid. This code supports laterality-specific reporting when the record clearly identifies the right side and upper lid. Check documentation if the note only says blepharitis without eyelid location.
Do not use for
Do not use this code for blepharitis on the left eyelid, both eyelids, or an unspecified eyelid. It is also not appropriate when the documentation describes a different eyelid disorder. Check documentation.
Coding tip
Verify both laterality and eyelid site in the provider note before assigning H01.021.