ICD-10 Code H00 – Hordeolum and chalazion (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H00 – Hordeolum and chalazion
What it is
H00 identifies eyelid disorders involving a hordeolum or chalazion. Use it when the record documents a stye, meibomian gland blockage, or a related eyelid lump.
Clinical signs
Typical findings include a localized eyelid swelling or nodule, often with tenderness in hordeolum and a firmer, usually less painful lump in chalazion. Clinical features vary; refer to documentation.
When to use this code
Use H00 when the provider documents hordeolum, chalazion, or both as the diagnosis for the visit. It also fits follow-up care when the eyelid lesion remains the active problem. If the note only says “eyelid swelling” without a named condition, check documentation.
Do not use for
Do not use H00 for nonspecific eye irritation, conjunctivitis, or trauma-related eyelid injury. If the chart describes another eyelid disorder, code that condition instead.
Coding tip
Code the documented eyelid lesion exactly as written and confirm whether the provider specifies hordeolum, chalazion, or both.