H10 Conjunctivitis

Name of the Condition

• Conjunctivitis

Summary

Conjunctivitis is an inflammation of the conjunctiva, the thin, transparent membrane covering the white part of the eye and the inner surface of the eyelids. It can affect one or both eyes and is commonly referred to as "pink eye" due to the redness it causes. The condition may result from infections, allergies, or irritants, and symptoms typically include redness, itching, and discharge.

Causes

Conjunctivitis can be caused by viral or bacterial infections, allergic reactions, or exposure to irritants such as smoke, chemicals, or foreign objects. Viral and bacterial forms are often contagious, while allergic conjunctivitis is triggered by allergens like pollen or pet dander.

Risk Factors

• Close contact with infected individuals.
• Allergies or asthma.
• Use of contact lenses, especially if hygiene practices are poor.
• Exposure to environmental irritants or allergens.
• Seasonal changes that increase pollen or mold levels.

Symptoms

• Redness in the white of the eye.
• Itching, burning, or gritty sensation.
• Increased tear production or discharge (watery, mucous, or pus-like).
• Swollen eyelids.
• Crusting of eyelashes, particularly in the morning.

Diagnosis

Diagnosis is typically based on a clinical evaluation, including a review of symptoms and medical history. A healthcare provider may examine the eye with a slit lamp and, in some cases, collect a sample of discharge for laboratory testing to identify the cause (e.g., viral, bacterial, or allergic).

Treatment Options

• Viral Conjunctivitis: Often resolves on its own; supportive care like cool compresses may alleviate discomfort.
• Bacterial Conjunctivitis: Antibiotic eye drops or ointments are prescribed.
• Allergic Conjunctivitis: Antihistamine or mast cell stabilizer eye drops, and avoidance of allergens.
• Irritant-Induced: Removal of the irritant and lubricating eye drops.

Prognosis and Follow-Up

Most cases of conjunctivitis resolve within 1–2 weeks with appropriate treatment. Follow-up may be recommended to ensure symptoms improve and to address any underlying causes. Chronic or recurrent cases may require further evaluation.

Complications

• Corneal inflammation (keratitis) in severe or untreated bacterial cases.
• Vision impairment if infection spreads to deeper eye structures.
• Persistent eye irritation or dryness.

Lifestyle & Prevention

• Practice good hand hygiene to avoid spreading infection.
• Avoid touching or rubbing the eyes.
• Remove contact lenses and clean them properly.
• Use hypoallergenic eye products and avoid known allergens.
• Protect eyes from irritants like smoke or chemicals.

When to Seek Professional Help

Seek care if symptoms worsen, persist beyond a week, cause significant pain, or affect vision. Immediate attention is needed for severe redness, light sensitivity, or signs of infection spreading.

Tips for Medical Coders

When coding for conjunctivitis, specify the laterality (e.g., right, left, bilateral) and any subtypes (e.g., allergic, bacterial) if documented. Ensure documentation supports the chosen code and includes details like onset (acute/chronic) and affected eye(s) to align with ICD-10-CM guidelines.