ICD-10 Code H00.029 – Hordeolum internum unspecified eye, unspecified eyelid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H00.029 – Hordeolum internum unspecified eye, unspecified eyelid
What it is
This code identifies an internal stye involving the meibomian gland of an unspecified eye and unspecified eyelid. It is used when the record confirms a hordeolum internum but does not specify laterality or eyelid location.
Clinical signs
Typical findings include a localized, tender swelling on the eyelid, often with redness and discomfort. Clinical features vary; refer to documentation for the exact eye and eyelid involved.
When to use this code
Use H00.029 when the clinician documents an internal hordeolum and the affected eye or eyelid is not identified. It also fits brief notes that confirm a stye inside the eyelid without laterality details. If the record is clearer, code the specified site instead.
Do not use for
Do not use this code for an external hordeolum, chalazion, or nonspecific eyelid swelling without a documented internal stye. Check documentation if the diagnosis is uncertain.
Coding tip
Query for laterality and eyelid detail when missing, because unspecified codes should be used only when the record truly lacks that information.