The NHS came into being on 5th July 1948, the creation of the charasmatic Aneurin (Nye) Bevan.
For information about the NHS and its history go to http://www.dh.gov.uk/en/News/NHS60/index.htm
Speaking personally, the health service is one of the most significant reasons for being proud to be British. Ill health is worrying enough, without the worry of facing huge bills. I commend the idea to all my American friends.