His comments came as the GMC released guidance on supporting information for revalidation, in a bid to simplify the process.
RCGP revalidation lead Professor Mike Pringle said the 'vast majority' of ROs - senior doctors who will act as a link between local healthcare organisations and the GMC - appointed by PCTs were medical directors.
'In most circumstances medical directors are the most appropriate person,' he said.
But Professor Pringle said he was unsure whether the appointed ROs in England would remain in post once PCTs were abolished. He said which organisations would have ROs in future in England was also an area of uncertainty.
GMC chief executive Niall Dickson said the GMC was encouraged. 'We are now getting a level of engagement that we haven't had before,' he said.
Meanwhile, the GMC said its new guidance Supporting information for appraisal and revalidation was based on the principles set out in Good Medical Practice guidance. The GMC said the new guidance aimed to make the appraisal process 'simple and straightforward'.The RCGP recently announced only one clinical audit and one patient and colleague survey will have to be produced for appraisal. But the number of significant events doctors must report during appraisal rose from five to 10.
Professor Pringle said this would make it easier for locum doctors to collect evidence.