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Physician assistant
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.
The occupational title of physician assistant and physician associate originated in the United States in 1967 at Duke University. The role has been adopted in the US, Canada, United Kingdom, Republic of Ireland, Netherlands, Australia, New Zealand, India, Israel, Bulgaria, Myanmar, Switzerland, Liberia, Ghana, and by analogous names throughout Africa, each with their own nomenclature and education structure. In Malawi they are called clinical officers. Most of them study clinical medicine at the Malawi College of Health Sciences and other colleges within the country. In 2021, the American Academy of Physician Assistants voted to rename itself the American Academy of Physician Associates (AAPA) and adopted "physician associate" as the preferred professional designation. U.S. state governments such as the one in Oregon have begun to implement statutory changes to reflect the name change in Oregon. The move has been controversial; critics of the name change feel the word "associate" could be misleading for patients trying to understand PAs' scope of practice, while proponents feel it better conveys the profession's collaborative and independent roles.
Depending on jurisdiction, a physician assistant or associates may:
Physician assistant scope of practice vary by country and state. Physician assistant practice laws in a majority of US states have been updated in recent years to give PAs more autonomy and reduce onerous supervision language. A few states now allow PAs to practice under a "collaborative" agreement rather than with direct physician supervision. In the UK, the General Medical Council (GMC) has become the official regulator of physician associates in December 2024. England's 2025 Leng Review also recommended standard national policies, including a specific supervision model and a unique PA uniform to distinguish PAs from doctors.
Physician assistants or associates train to work in settings such as hospitals, clinics and other types of health facilities, or virtually via telemedicine. PAs are commonly found working in teaching and research as well as hospital administration and other clinical environments. PAs may practice in primary care or Health Sciences specialties, including emergency medicine, surgery and cardiology.
Physician assistant job growth in the 21st century has been substantial. In the United States, the U.S. Bureau of Labor Statistics reported that "demand for PAs is expected to grow 27% from 2022 to 2032, much faster than the average for all occupations". Median annual wages for U.S. physician assistants have increased to over $130,000 and are higher still in surgical and emergency medicine subspecialties. A number of sources have reported that the increasing demand for physician assistants is a result of physician shortages in primary care and increased use of team-based models of care.
Physician assistant (or associate) education is shorter than the medical degree required to become a physician (MD/DO). Most PAs in the United States have completed 4 years of undergraduate training followed by 2–3 years of Master's-level training, including both didactic training and clinical training. The didactic portions usually include microbiology, genetics, clinical anatomy and physiology, clinical pathophysiology, clinical medicine, clinical pharmacology, patient history & physical exam, clinical problem-solving, women's health, and applied clinical skills. The clinical year usually entails of 4-8 week rotations in surgery, family medicine, emergency medicine, OB/GYN, psychiatry, internal medicine, pediatrics, and other rotations depending on the school. In total, most United States PA Master's programs come out to about 100 semester credit hours (ranging from 95 to 122) or 150 quarter hours.
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Physician assistant
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.
The occupational title of physician assistant and physician associate originated in the United States in 1967 at Duke University. The role has been adopted in the US, Canada, United Kingdom, Republic of Ireland, Netherlands, Australia, New Zealand, India, Israel, Bulgaria, Myanmar, Switzerland, Liberia, Ghana, and by analogous names throughout Africa, each with their own nomenclature and education structure. In Malawi they are called clinical officers. Most of them study clinical medicine at the Malawi College of Health Sciences and other colleges within the country. In 2021, the American Academy of Physician Assistants voted to rename itself the American Academy of Physician Associates (AAPA) and adopted "physician associate" as the preferred professional designation. U.S. state governments such as the one in Oregon have begun to implement statutory changes to reflect the name change in Oregon. The move has been controversial; critics of the name change feel the word "associate" could be misleading for patients trying to understand PAs' scope of practice, while proponents feel it better conveys the profession's collaborative and independent roles.
Depending on jurisdiction, a physician assistant or associates may:
Physician assistant scope of practice vary by country and state. Physician assistant practice laws in a majority of US states have been updated in recent years to give PAs more autonomy and reduce onerous supervision language. A few states now allow PAs to practice under a "collaborative" agreement rather than with direct physician supervision. In the UK, the General Medical Council (GMC) has become the official regulator of physician associates in December 2024. England's 2025 Leng Review also recommended standard national policies, including a specific supervision model and a unique PA uniform to distinguish PAs from doctors.
Physician assistants or associates train to work in settings such as hospitals, clinics and other types of health facilities, or virtually via telemedicine. PAs are commonly found working in teaching and research as well as hospital administration and other clinical environments. PAs may practice in primary care or Health Sciences specialties, including emergency medicine, surgery and cardiology.
Physician assistant job growth in the 21st century has been substantial. In the United States, the U.S. Bureau of Labor Statistics reported that "demand for PAs is expected to grow 27% from 2022 to 2032, much faster than the average for all occupations". Median annual wages for U.S. physician assistants have increased to over $130,000 and are higher still in surgical and emergency medicine subspecialties. A number of sources have reported that the increasing demand for physician assistants is a result of physician shortages in primary care and increased use of team-based models of care.
Physician assistant (or associate) education is shorter than the medical degree required to become a physician (MD/DO). Most PAs in the United States have completed 4 years of undergraduate training followed by 2–3 years of Master's-level training, including both didactic training and clinical training. The didactic portions usually include microbiology, genetics, clinical anatomy and physiology, clinical pathophysiology, clinical medicine, clinical pharmacology, patient history & physical exam, clinical problem-solving, women's health, and applied clinical skills. The clinical year usually entails of 4-8 week rotations in surgery, family medicine, emergency medicine, OB/GYN, psychiatry, internal medicine, pediatrics, and other rotations depending on the school. In total, most United States PA Master's programs come out to about 100 semester credit hours (ranging from 95 to 122) or 150 quarter hours.