Health regulators have launched a review into how easy it is for patients to access their family doctors.
Regulator Monitor said it was examining patients’ ability to access general practitioner services.
Officials will investigate whether GP services “operate in the best interests of patients”, a spokesman said.
GP leaders recently said that family doctors are under so much pressure that they may not be able to deliver safe care for patients.
Dr Clare Gerada, chairwoman of the Royal College of General Practitioners, said that some see as many as 60 patients a day and are struggling to cope with ballooning workloads.