ICD-10 Code H00.02 – Hordeolum internum (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H00.02 – Hordeolum internum
What it is
Hordeolum internum is an internal stye, a localized infection or inflammation of an eyelid meibomian gland. Use this code when the record identifies the lesion as internal rather than external.
Clinical signs
Typical findings include a painful, tender eyelid lump with localized redness and swelling on the inner lid. Clinical features vary; refer to documentation.
When to use this code
Use H00.02 when the clinician documents hordeolum internum, internal stye, or an infected meibomian gland. Apply it for the affected eyelid when laterality is not further specified in the available code set. Check documentation if the note is unclear.
Do not use for
Do not use this code for a chalazion, which is typically noninfectious and may look similar. Also avoid it when the record describes an external hordeolum or another eyelid disorder.
Coding tip
Verify the note says “internal” or “meibomian gland” before assigning H00.02.