ICD-10 Code H00.011 – Hordeolum externum right upper eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H00.011 – Hordeolum externum right upper eyelid
What it is
H00.011 identifies a stye on the outer edge of the right upper eyelid. It refers to a localized infection or inflammation of an eyelid gland near the lash line.
Clinical signs
You may see a small, tender, red bump on the right upper eyelid, often near an eyelash. Swelling, pain, and localized eyelid redness are common; clinical features vary, refer to documentation.
When to use this code
Use this code when the record clearly documents a hordeolum externum affecting the right upper eyelid. Apply it for a specific external stye, not a general eyelid infection. If laterality or eyelid location is unclear, check documentation.
Do not use for
Do not use H00.011 for chalazion, internal hordeolum, or styes on a different eyelid or side. If the note does not specify an external lesion on the right upper eyelid, check documentation.
Coding tip
Confirm both laterality and that the lesion is external before assigning H00.011.