U00-U49: Provisional assignment of new diseases of uncertain etiology or emergency use

U13: Emergency use of U13

The group of conditions classified under emergency use in U13 usually refers to special situations or conditions that are not categorized elsewhere in the International Classification of Diseases (ICD-10). As such, conditions falling under this group may have a wide range of causes, symptoms, and potential transmission methods. Typically, these conditions emerge due to unforeseen or unusual circumstances, often in times of public health emergencies. The progression of these conditions and the body systems they affect can also vary broadly. Examples can range from illnesses associated with specific environmental disasters to newly discovered diseases. Symptoms are usually determined by the specific condition, making this group highly diverse. Unfortunately, due to the unique and often rapidly evolving nature of these conditions, comprehensive details or patterns cannot be commonly generalized.