The deal introduces a minimum level of system functionality for Wales, to which all four suppliers have agreed, and faster maintenance support.
Under a deal signed by England's Connecting for Health IT agency last month, GPs have a wider choice of eight systems (GP, 17 August).
But only 20 practices in Wales use systems from suppliers other than EMIS, In Practice Systems and iSoft. This trio, along with Healthy Software, have signed up to the national agreement.
GPC Wales negotiator Dr Ian Millington said: 'Existing contracts will be cancelled and drawn into a single deal.'
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