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

U35: Emergency use of U35

The U35 category in the International Classification of Diseases, Tenth Revision (ICD-10) was designated by the World Health Organization (WHO) for the emergency use of health interventions for specific events. This special provision was created in response to critical public health events, including pandemics or other large-scale health crises, when it may be necessary to quickly identify new diseases or health effects that are not represented in the existing classification. This code is used when it's critical to track illnesses or conditions related to these events, using a universal language that healthcare professionals around the world can understand. Please note that U35 is not related to a specific disease or condition, but rather it's a unique code reserved for these rare, emergency situations that require swift global health responses.