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

U43: Emergency use of U43

The ICD-10 code U43 corresponds to a set of conditions earmarked for emergency use. Generally, these conditions are those under surveillance by health organizations due to their capacity for rapid widespread dissemination and severe health impacts. The causes, transmission, symptoms, disease progression, and affected systems variy wildly, as these conditions can include biological, chemical, or radiological hazards. Additionally, emerging diseases or conditions with pandemic potential also qualify for U43 classification. Despite their differences, these conditions share a notable urgency for prompt identification, tracking, and control actions. Each individual U43 condition has its unique manifestation and disease processes, potentially affecting different parts of the body and inducing a broad spectrum of symptoms. Thus, the term "U43 – Emergency use" serves as an umbrella term for variable conditions that need immediate attention due to their emergent and potentially critical nature.