Speaking at the Conservative party conference in Manchester this week, Mr Cameron praised the work of the south-east London CCG in Bexley.
Mr Cameron said he saw the ‘spirit’ of the UK in the group.
‘I see it in the group of GPs in Bexley who have taken more control of their budgets, and got their patients - some of the poorest in the country - free care on Harley Street.
‘Their ambition? To cut waiting times, cut costs and improve care - all in one go. That's leadership.’
A GP federation in Bexley established a link with Harley Street physicians to reduce the waiting time for cardiology diagnoses.
The initiative successfully reduced waiting times, cut costs and received excellent patient feedback.
Shadow health minister Liz Kendall tweeted: 'The PM's vision for NHS? Free treatment for patients in Harley Street (where he clearly thinks healthcare is best). Enough said.
'Will fuel concern re Tory future of NHS.'