ICD-10 Code H00.013 – Hordeolum externum right eye, unspecified eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H00.013 – Hordeolum externum right eye, unspecified eyelid
What it is
H00.013 identifies an external stye on the right eye when the eyelid is not specified. It refers to a localized infection or inflammation of an eyelid gland near the lash line.
Clinical signs
Typical findings include a tender, red, swollen bump at the eyelid margin, often with localized pain or irritation. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents an external hordeolum of the right eye and does not identify the upper or lower eyelid. Apply it for a clearly documented stye limited to the right eyelid margin.
If the note specifies a different eyelid, laterality, or a chalazion instead, choose the more accurate code. Check documentation when the eyelid location is unclear.
Do not use for
Do not use this code for internal hordeolum, chalazion, or left-eye lesions. It is also incorrect when the provider documents only nonspecific eyelid swelling without a stye diagnosis.
Coding tip
Confirm laterality and whether the eyelid is specified before assigning H00.013.