H01

H01 is a diagnostic category in the ICD-10-CM coding system used to classify diseases of the eyelid, specifically hordeolum (stye) and chalazion. The code group is employed in medical records, billing, and epidemiological reporting to identify eyelid inflammation and related lesions.

The H01 category generally encompasses disorders such as hordeolum externa (external stye), hordeolum interna (internal stye), and chalazion, along with other eyelid disorders that are not due to systemic diseases. Subcodes and exact definitions may vary by version of ICD-10-CM, so practitioners refer to the current coding manual for precise classification and coding.

Hordeolum refers to an acute infection of the eyelid glands, typically caused by Staphylococcus species. An external hordeolum involves the eyelid margin and hair follicles, while an internal hordeolum affects the Meibomian glands. A chalazion is a chronic, sterile granulomatous inflammation resulting from gland obstruction, presenting as a painless eyelid lump.

Management focuses on symptom relief and addressing the underlying cause. Warm compresses, lid hygiene, and regular massage of the eyelid margin are common first-line measures. Topical antibiotics may be used if infection is suspected or present. Internal hordeola or persistent chalazia may require incision, drainage, or surgical excision, sometimes with corticosteroid injections.

Prognosis is generally favorable, though recurrence can occur, especially in individuals with blepharitis or Meibomian gland dysfunction. Awareness of eyelid hygiene and prompt care reduce complications.