ICD-10 Code H00.023 – Hordeolum internum right eye, unspecified eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H00.023 – Hordeolum internum right eye, unspecified eyelid
What it is
This code identifies an internal stye in the right eye when the eyelid is not further specified. It refers to a localized infection or inflammation of a meibomian gland within the eyelid.
Clinical signs
Typical findings include a painful, swollen eyelid with tenderness and redness near the lid margin or within the lid. Clinical features vary; refer to documentation.
When to use this code
Use H00.023 when the provider documents a hordeolum internum affecting the right eye and does not specify the upper or lower eyelid. You should also use it when the note clearly supports an internal stye in the right eyelid but laterality and location are limited to “unspecified eyelid.”
Do not use for
Do not use this code for a stye in the left eye, an external hordeolum, or a chalazion. Check documentation when the eyelid location or lesion type is unclear.
Coding tip
Confirm both laterality and whether the lesion is internal before assigning H00.023.