A leading medical royal college says physician associates (PAs) should only be supervised by senior doctors, and not doctors in training, in guidance issued to members.
The Royal College of Physicians' (RCP) announcement follows an acrimonious debate in the medical profession over the use of PAs, who are intended to assist doctors and can perform some health examinations.
There have been claims that the scope of the role is not clear, that patients are not always aware of the status of PAs, and that their differentiation with doctors is becoming blurred.
An independent review of the role, announced by Health Secretary Wes Streeting, will report in the spring.