The roll out follows five months of testing of a new digital application service to verify the status of former servicemen and women.
Those who left the Armed Forces prior to December 2018 can verify their veteran status online and receive a veteran ID card in the post.
The Ministry of Defence said it was delivering the service, together with the Office for Veterans' Affairs, as part of ongoing improvements to veteran support.
The new veteran ID card provides a memento of service and maintains a tangible link to the Armed Forces.
It also allows veterans to easily confirm their service to the NHS, their local authority and charities, enabling them to access support and services where needed.
Veterans will be able to use their ID card to apply for the Defence Discount Service card and the Veterans Railcard.
They can apply for their cards by visiting the GOV.UK website at gov.uk/veteran-card
A paper-based application process will also be made available for veterans who are unable to use the online service.