A Display Energy Certificate (DEC) shows the energy performance of a building based on actual energy consumption as recorded over the last 12 months within the validity period of the DEC (the operational rating). These regulations apply to GP surgeries as GP practices are in receipt of public funds and provide a public service to large numbers of people who visit regularly; GP premises are included in the definition of a public building.
The person responsible for arranging DEC is the occupier of the building. However, the position might be different if an NHS landlord such a NHS Property Services or Community Health Partnership owns the building, rather than a private landlord, in which case they will probably be responsible for obtaining and paying for the DEC.
For further information please see the BMA website and The Energy Performance of Buildings (England and Wales) Regulations 2012