J45: Asthma

J45.0: Predominantly allergic asthma

Predominantly allergic asthma, denoted by ICD-10 code J45.0, is a type of chronic respiratory condition where the immune system overreacts to certain allergens, leading to an inflammatory response in the airways. It is commonly triggered by environmental allergens such as pollen, dust, pet dander, or certain foods. Symptoms include recurrent episodes of breathlessness, coughing, wheezing, and chest tightness, which may be worse at night or early in the morning. These symptoms result from the narrowing and swelling of the airways, along with excessive mucus production. This type of asthma often manifests in childhood, though it can occur at any age. Severity and frequency of symptoms can vary widely among individuals, ranging from mild and infrequent bouts to constant and life-threatening attacks. Even periods of seeming wellness can be interrupted by exacerbations, called 'asthma attacks'. The function of the respiratory system is primarily affected by this condition.