ICD-10 Code H00.12 – Chalazion right lower eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H00.12 – Chalazion right lower eyelid
What it is
H00.12 identifies a chalazion on the right lower eyelid. It is a localized, usually noninfectious blockage and inflammation of an eyelid oil gland.
Clinical signs
Typical findings include a firm, painless or mildly tender lump in the right lower lid. Clinical features vary; refer to documentation if the record does not clearly describe laterality and eyelid location.
When to use this code
Use H00.12 when the provider documents a chalazion specifically on the right lower eyelid. This code supports laterality-specific coding when the note identifies the lesion as right-sided and in the lower lid. If the site is not stated, check documentation before assigning a code.
Do not use for
Do not use this code for a stye, generalized eyelid swelling, or a chalazion on another eyelid. If the record only says “chalazion” without laterality or lid location, check documentation.
Coding tip
Confirm both laterality and eyelid before coding, because ICD-10 distinguishes right lower eyelid from other chalazion sites.