A15.5 Tuberculosis of larynx, trachea and bronchus

Name of the Condition

• Tuberculosis of larynx, trachea and bronchus (ICD-10-CM: A15.5)

Summary

Tuberculosis of the larynx, trachea, and bronchus is a form of respiratory tuberculosis caused by Mycobacterium tuberculosis. It affects the upper airway structures, including the voice box (larynx), windpipe (trachea), and bronchial tubes. This condition spreads through airborne droplets from an individual with active TB and is part of the broader respiratory TB category.

Causes

Tuberculosis of the larynx, trachea, and bronchus is caused by the bacterium Mycobacterium tuberculosis. Infection occurs when a person inhales respiratory droplets containing the bacteria, typically from an individual with active TB. The bacteria can infect the upper airway structures, leading to inflammation and tissue damage.

Risk Factors

• Prolonged exposure to someone with active TB.
• Living in or traveling to areas with high TB prevalence.
• Compromised immune system (e.g., HIV/AIDS, diabetes).
• Substance abuse, including alcohol and tobacco.
• Malnutrition or poor living conditions.

Symptoms

• Persistent cough (lasting three weeks or more).
• Hoarseness or voice changes.
• Difficulty breathing or wheezing.
• Chest pain or discomfort.
• Fever, chills, and night sweats.
• Unintended weight loss.
• Hemoptysis (coughing up blood).

Diagnosis

Diagnosis involves a combination of clinical evaluation, imaging, and laboratory tests. A chest X-ray or CT scan may show characteristic changes in the airway structures. Sputum tests (microscopy, culture, or nucleic acid amplification) can detect the bacteria. Bronchoscopy with tissue biopsy may be performed to confirm infection and assess airway involvement.

Treatment Options

Treatment typically involves a multi-drug regimen of antibiotics (e.g., isoniazid, rifampin, ethambutol, pyrazinamide) for at least six months. Directly observed therapy (DOT) is often recommended to ensure adherence. Severe airway obstruction may require bronchoscopic interventions or surgical procedures.

Prognosis and Follow-Up

With appropriate treatment, most patients recover fully. Follow-up includes monitoring for treatment response, side effects, and recurrence. Regular sputum tests and imaging may be used to assess healing. Patients with compromised immune systems may have a longer or more complicated recovery.

Complications

• Airway obstruction or narrowing.
• Chronic hoarseness or voice changes.
• Spread of infection to other parts of the respiratory system.
• Respiratory failure in severe cases.
• Treatment-related side effects (e.g., liver toxicity).

Lifestyle & Prevention

• Avoid close contact with individuals who have active TB.
• Ensure proper ventilation in living or work environments.
• Complete the full course of prescribed antibiotics.
• Maintain a healthy immune system through balanced nutrition and regular medical care.
• Quit smoking and limit alcohol use to reduce respiratory irritation.

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe difficulty breathing or wheezing.
• Significant hemoptysis (coughing up large amounts of blood).
• High fever or persistent night sweats.
• Unintended weight loss or extreme fatigue.
• Sudden worsening of cough or voice changes.

Tips for Medical Coders

Document the specific site of infection (larynx, trachea, or bronchus) and any associated symptoms or complications. Ensure the code A15.5 is used only when the infection is confirmed in these upper airway structures. Include details about diagnostic tests (e.g., bronchoscopy, sputum culture) and treatment regimens to support medical necessity.