ICD-10 Code H00.16 – Chalazion left eye, unspecified eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H00.16 – Chalazion left eye, unspecified eyelid
What it is
Use this code for a chalazion in the left eye when the affected eyelid is not specified. A chalazion is a localized eyelid lump caused by blockage and inflammation of a meibomian gland.
Clinical signs
Typical findings include a painless, firm eyelid nodule or swelling, often with mild tenderness early on. Clinical features vary; refer to documentation for the exact eyelid location and laterality.
When to use this code
Assign H00.16 when the provider documents a chalazion of the left eye and does not identify the upper or lower eyelid. Use it for current encounters describing a persistent eyelid lump, with or without redness. Check documentation if the note mentions infection, multiple lesions, or a different eyelid disorder.
Do not use for
Do not use this code for right-eye chalazion, bilateral chalazia, or when the eyelid is specified in the record. Do not use it for stye/hordeolum unless that diagnosis is documented.
Coding tip
Verify laterality and eyelid detail in the note before choosing H00.16; if the eyelid is named, code the more specific option.