U00-U49: Provisional assignment of new diseases of uncertain etiology or emergency use
U21: Emergency use of U21
The U21 category in the ICD-10 WHO 2016 classification refers to the designation for emergency use of codes that are not classified in other parts of the classified system. This category is typically utilized during situations of public health urgency, such as during an outbreak or a pandemic. Conditions under this category may vary significantly in causes and symptoms. These conditions are often highly infectious and potentially lethal, requiring rapid identification and subsequent coding for data collection and tracking. They may impact various bodily systems and manifest in a wide range of symptoms, often influencing respiratory or immunological systems heavily. The disease progression can be swift or slow, contingent on the specific circumstances of the emergent public health event.
Subcodes of U21:
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.