A long-awaited polyclinic in Shepherd's Bush will be housed in portable buildings, which could be second hand, for up to two years.
Hammersmith and Fulham NHS will pay for cabins for GPs and dentists to be 'refurbished' and sited in the grounds of Canberra School, in Australia Road.
The temporary buildings are needed because of planning delays over a permanent health centre, which is to be built on the Janet Adegoke sports centre in Bloemfontein Road by 2011.
Shepherd's Bush MP Andy Slaughter says he was privy to negotiations between Canberra and the NHS. He believes the site rental for the NHS will come to £250,000.
An NHS spokeswoman could not reveal how much the school would be paid or how much it will cost to build and dismantle the temporary centre.
She added: "We hope to have the new GP and NHS dental services open by the summer. The temporary accommodation will be completely refurbished and will exceed existing requirements for permanent healthcare buildings.
"The White City area is short of GP and dental services - which the new centre will solve. We want to get the services in now."
Permission was finally granted for the permanent building in July, after years of wrangling.
Mr Slaughter also blames Hammersmith and Fulham Council for the delay, adding: "A state of the art polyclininc should have been built by now."
Council leader Stephen Greenhalgh rejected his claims. He said: "The previous (Labour) administration had the opportunity, after many years of dithering, to approve their planning application for this site on 26 April 2006, but failed to do so.
"As soon as we took over the council, a viable application was drafted and quickly approved.
"Andrew Slaughter then attempted to de-rail the scheme. For him to blame anything but his own politically motivated sabotage for any delays in this scheme is hypocrisy of the highest order."