D80-D89: Certain disorders involving the immune mechanism

D84: Other immunodeficiencies

Other immunodeficiencies, classified under the ICD-10 code D84, are a group of conditions characterized by the immune system's inability to adequately defend the body against disease-causing foreign substances or “invaders” such as viruses, bacteria and fungi. These conditions can be a result of genetic anomalies, infections, malnutrition, aging, or certain medications or treatments like chemotherapy. People with these conditions tend to get sick more often and suffer from infections that are more severe and last longer than usual. They might also experience recurrent infections, chronic skin conditions, digestive problems, swollen lymph nodes, and general fatigue. The progression of the disease can vary, with some individuals experiencing intermittent periods of ill health, while others might have a constant presence of disease. Immunodeficiencies particularly affect the body's immune system, compromising its ability to fight off infections and diseases, thus disrupting normal bodily functions.