ICD-10 Code H01.004 – Unspecified blepharitis left upper eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H01.004 – Unspecified blepharitis left upper eyelid
What it is
This code identifies inflammation of the left upper eyelid margin when the type of blepharitis is not specified. Use it when documentation confirms blepharitis but does not name anterior, posterior, or another subtype.
Clinical signs
Typical findings include eyelid redness, irritation, crusting, flaking, itching, or a gritty sensation. Clinical features vary; refer to documentation if the record does not clearly describe the affected lid or laterality.
When to use this code
Use H01.004 when the provider documents unspecified blepharitis limited to the left upper eyelid. It also fits notes that describe lid-margin inflammation without further detail on cause or subtype. If the record states a different eyelid, laterality, or a more specific form, code that instead.
Do not use for
Do not use this code for blepharitis affecting another eyelid or both eyes. It is also incorrect when the documentation identifies a specific blepharitis type or a different eyelid disorder.
Coding tip
Check the note for exact laterality and eyelid location before assigning H01.004.