Regulation of Physician Assistants

Physician assistants (PAs) are skilled health care professionals who provide a broad range of medical services within health care teams under the supervision of a physician. PAs act as physician-extenders to complement existing services and aid in improving access to health care.

PAs are required to meet clearly defined registration requirements and standards, which include having the necessary "knowledge, skill and judgment" to practise and to use the protected title "Physician Assistant" or the abbreviation "PA".

What is a PA’s scope of practice?

A PA’s scope of practice will reflect their supervising physician's scope of practice and is determined by the PA’s own knowledge, skill, and judgment. This means that each PA’s scope of practice will vary according to a number of factors, including the individual’s education, training and experience.

When did CPSO begin regulating PAs?

CPSO began regulating PAs on April 1, 2025.

Has regulation changed the way PAs currently practise?

No. Regulation has preserved the status quo because the existing relationship between physicians and PAs, anchored in the delegation framework, is well established and has been working effectively for many years. A delegation model also enables flexibility by allowing PAs to work with multiple physicians and practise in multiple settings.

Are PAs authorized to perform any controlled acts independently?

No. PAs can only perform controlled acts through delegation and with appropriate supervision by a physician, as set out in CPSO’s Professional Obligations: Delegation of Controlled Acts.

More Information

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