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ICD11

Diseases of the respiratory system (J00–J99)

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Diseases of the respiratory system is a chapter in ICD-11 that includes conditions affecting the airways, lungs, and respiratory muscles involved in breathing and gas exchange. These disorders may result from infections, allergic reactions, environmental exposures, genetic factors, or chronic inflammatory processes, leading to symptoms such as cough, shortness of breath, wheezing, chest discomfort, or impaired oxygenation.

This chapter encompasses a broad spectrum of respiratory conditions, including upper and lower respiratory tract infections, asthma, chronic obstructive pulmonary disease, interstitial lung diseases, and respiratory failure. Accurate classification supports timely diagnosis, appropriate treatment, and ongoing management, while also aiding epidemiological surveillance, research, and public health initiatives aimed at improving respiratory health and reducing disease burden.

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Frequently asked questions

This chapter includes disorders affecting the airways, lungs, and respiratory function.

It includes asthma, chronic obstructive pulmonary disease, pneumonia, interstitial lung diseases, and respiratory infections.

Yes. The chapter covers both short-term and long-term respiratory conditions.

Respiratory infections are classified here based on anatomical involvement, while the causative organism may be coded separately.

It provides clearer grouping and updated terminology aligned with pulmonology practice.

It supports clinical management, research, public health surveillance, and resource planning.

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