Areas of the UK will be given an extra six months to prepare for the rollout of the 111 NHS non-emergency number.
The government's Department of Health said that it came to its decision after listening to local Clinical Commissioning Groups and other stakeholders.
Simon Burns, health minister, said that NHS 111 is being introduced to make it easier for people to get the health advice or service that they need at the first time of trying.
"It is essential that local groups of GPs are engaged in the implementation of this new service to ensure that NHS 111 fits within a comprehensive local 24/7 urgent health system, that meets patient needs," he stated.
The move to give regions extra time has been praised by the British Medical Association.
Committee chairman Dr Laurence Buckman said that the original speed of the rollout was putting the principles behind NHS 111 "at risk".