Dr James Kingsland, the DoH's national clinical network lead, predicted up to two thirds of England’s population would be covered by the pilot sites after the announcement.
But little information is available from pathfinders taking part in the programme so far, said Dr Kingsland.
The first 52 consortia to be granted pathfinder status were announced in December. Health secretary Andrew Lansley said the aim of the pathfinder programme would be 'a research project' to evaluate GP commissioning throughout its implementation.
A second wave of 89 new pathfinder GP consortia took the total number to 141 in January.