Physician assistant

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A physician assistant or physician associate (PA) is a type of non-physician practitioner. While these job titles are used internationally, there is significant variation in training and scope of practice from country to country, and sometimes between smaller jurisdictions such as states or provinces. Depending on location, PAs practice semi-autonomously under the supervision of a physician, or autonomously perform a subset of medical services classically provided by physicians. The educational model was initially based upon the accelerated training of physicians in the United States during the shortage of qualified medical providers during World War II. Since then, the use of PAs has spread to at least 16 countries around the world. In the US, PAs may diagnose illnesses, develop and manage treatment plans, prescribe medications, and serve as a principal healthcare provider. In many states PAs are required to have a direct agreement with a physician. In the UK, PAs were introduced in 2003. They support the work of the healthcare team, but are dependent clinicians requiring supervision from a physician. They cannot prescribe medications nor request ionising radiation investigations (e.g., x-ray) in the UK. PAs are widely used in Canada. The model began during the Korean War and transitioned to the present concept in 2002. Skills and scope of privileges are similar to those in the US.