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

U22: Emergency use of U22

The ICD-10 U22 represents a grouping of conditions under Emergency Use, a unique category reserved for medical and health conditions requiring expediated attention and treatment due to an immediate threat to public health. Conditions in this grouping are often characterized by their fast-spreading nature and impactful effects. While the specific cause, symptoms, and disease progression can vary, conditions under this category share some commonalities, such as the potential for rapid transmission between individuals or arise due to a significant health event. They may also affect multiple body systems simultaneously, causing a broad range of signs and symptoms which can evolve and amplify over time. Because the focus of this grouping is on urgent and unusual public health events, the conditions listed under the U22 category tend to be subject to intense scrutiny, research and changes as more knowledge is acquired.