What H00 covers · when clinicians use it
ICD-10 code H00 identifies Hordeolum and chalazion in the U.S. ICD-10-CM clinical and billing record set. It sits within the Eye and Adnexa chapter (H00–H59), the section that groups related diagnoses so providers, payers, and public-health agencies report them consistently. Clinicians and medical coders apply H00 when an encounter's findings match the Hordeolum and chalazion description, attaching it to the patient record so downstream insurance claims, payer audits, quality reporting, and epidemiological surveillance all reference the same standardized diagnosis. The ICD-10-CM is maintained by the Centers for Medicare & Medicaid Services and the CDC's National Center for Health Statistics, with an updated official code set released each U.S. fiscal year — always verify H00 against the current CMS/CDC release and your payer's documentation guidance before final use. This page summarizes documentation context for H00 and is a coding reference, not clinical, diagnostic, or billing advice.
H00 refers to Hordeolum and chalazion, a set of ocular disorders involving the eyelids, tear-producing structures, or the eye socket (orbit). These conditions may be caused by infection, inflammation, trauma, or anatomical abnormalities and often present with swelling, discomfort, or visual changes.
Symptoms
- Swollen, red eyelid – Seen in hordeolum (stye) or chalazion (H00)
- Scaly, itchy lids – Common in eyelid dermatitis or blepharitis (H01)
- Eyelid drooping or malposition – Found in entropion, ectropion under H02
- Tearing or dry eye – Suggests lacrimal gland or duct disorders (H04)
- Bulging eye or restricted movement – Linked to orbital cellulitis or tumors (H05)
- Localized pain or pressure – Present in many lacrimal and orbital pathologies
- Blurred vision or eye displacement – Particularly concerning in orbital involvement
Diagnosis
Diagnosis of Hordeolum and chalazion includes clinical eye examination, slit-lamp evaluation, fluorescein staining (for lacrimal assessment), imaging like orbital CT or ultrasound (for H05), and occasionally biopsy for persistent or atypical lesions. History of trauma or infection helps guide diagnosis.
ICD10 Code Usage
ICD10 code H00 is used in ophthalmology, emergency care, ENT, and general practice settings. It supports clinical documentation for insurance, procedural coding (e.g., drainage or surgery), medical leave justification, and specialty referrals.
Related Codes
- H01 – Other inflammation of eyelid
- H02 – Other disorders of eyelid
- H04 – Disorders of lacrimal system
- H05 – Disorders of orbit
FAQs
Q1: What is ICD10 code H00?
A: It refers to Hordeolum and chalazion, affecting eyelids, tear ducts, or orbital structures and often associated with inflammation, infection, or structural anomalies.
Q2: Are these conditions serious?
A: Most eyelid issues are minor, but orbital infections (H05) can threaten vision or spread intracranially if not treated promptly.
Q3: How are lacrimal disorders treated?
A: Treatments include artificial tears, warm compresses, lacrimal probing, or surgical procedures like dacryocystorhinostomy.
Q4: Can these be managed at home?
A: Mild conditions like styes may resolve with warm compresses, but persistent, painful, or vision-affecting issues need medical evaluation.
Q5: Who manages these conditions?
A: Ophthalmologists, optometrists, oculoplastic surgeons, and sometimes ENT specialists depending on complexity.
Conclusion
ICD10 code H00 ensures proper classification and treatment planning for Hordeolum and chalazion, improving access to specialist care, appropriate interventions, and outcome tracking in patients with eyelid, lacrimal, or orbital disorders.