More than 300 GP surgeries in England received an "inadequate" or "requires improvement" rating in their latest inspection, it has been revealed.
A total of 51 GPs were deemed "inadequate" by the Care Quality Commission (CQC) - the independent regulator of health and adult social care in England.
Meanwhile, a further 251 were said to require improvement as of February 1, the most recent date available.
The criteria was selected from four overall ratings - outstanding, good, requires improvement, or inadequate.
You can find the practices in your area with the lowest ratings using our interactive map.
Enter your postcode to zoom into your area:
London has the highest number of "inadequate" GP surgeries at a total of nine, show figures, followed by Birmingham and Essex.
The capital also ranked the worst for under-performing surgeries as a whole, with a combined figure of 72 "inadequate" and "requiring improvement".
Meanwhile, in a separate survey conducted by the NHS, patients also gave their opinions on their GP surgery.
Analysis of these ratings has been carried out by the Reach Data Unit to rank all 6,418 practices across England.
You can see how patients ranked your local practice using our gadget below.
The health service also publishes data regarding the number of face-to-face appointments offered.
Figures released last month show that a total of 26.8million appointments were made at doctor surgeries in December.
Of these, almost 18.3million appointments (68%) were in person while 7.4million (28%) took place over the phone.
However, according to the data, fewer than one in five appointments at some practices were classed as being face-to-face.
You can find your local practice using this gadget and see how it compares.
The latest results come as health experts warn that public support for the Government's handling of the NHS in England has plummeted to its lowest level in two decades.
Fewer than one in 10 people in England (8%) agree that the UK Government has the right policies for the health service, a new poll suggests.
The previous low was 22% in 2006, while support peaked at 37% in 2008 and 2009.
The survey, from Ipsos and the Health Foundation, suggests that only 10% of people across the UK as a whole feel their government has the right plans for the NHS.
In Scotland and Wales more people feel their devolved governments have the right policies, at 28% and 19% respectively, while people in England were asked about the Westminster Government.
The Health Foundation said that while a change in survey methodology meant comparisons with data before 2021 were only indicative, the findings were consistent with trends seen elsewhere and illustrated the escalation of concerns among the public.
Senior policy fellow Tim Gardner said the public expected to see more action from Government and wanted to see a credible plan for recovering and improving the health service.
He added: "These findings should be ringing alarm bells in Number 10. This is a very low level of public confidence in the Government's handling of the health service and it's quite clear that people are very concerned at the current state of the health service.
"But it's equally clear that despite all of the frustrations that, by and large, people are not blaming the service, its staff or the model of the NHS for what's going on."
The survey suggests only a third of people across the UK (33%) agree the NHS is providing a good service nationally, down from more than one in four (43%) in the previous poll in May 2022.
There is little evidence of people believing the NHS will improve in the short term, with 62% of respondents saying they think the standard of NHS care will fall over the next 12 months - up from 39% who thought this in May 2022.
The Health Foundation said that despite these concerns, the public's commitment to the founding principles of the NHS is as strong as ever, with 90% of respondents believing the NHS should be free at the point of delivery, 89% that the NHS should provide a comprehensive service available to everyone, and 84% that the NHS should be funded primarily through taxation.
Mr Gardner added: "Despite the public being very clearly deeply negative about the current state of the health service and how it is performing, support for the founding principles for the NHS is really rock solid.
"There are substantial majorities of the public who think those three core founding principles from 1948 should continue to apply today.
"This is a belief shared right across society regardless of age, political affiliations or anything else."
Regions with the highest number of 'inadequate' GPs
Below is a list of the areas where GP surgeries received an "inadequate" rating, ranked from highest to lowest.
- London - 9
Birmingham - 5
Essex - 5
Sussex - 4
Kent - 3
Nottinghamshire - 3
Chester - 2
Leicestershire - 2
Lincolnshire - 2
Merseyside - 2
Greater Manchester - 2
Devon - 1
Hampshire - 1
North East - 1
Surrey - 1
Bedfordshire - 1