The National Institute for Health and Clinical Excellence (NICE) is a special health authority

NHS Special Health Authority

A special health authority is a type of NHS trust which provide services on behalf of the National Health Service in England. Unlike other types of Trust, they operate nationally rather than serve a specific geographical area....

 of the English National Health Service (NHS), serving both English NHS and the Welsh NHS. It was set up as the National Institute for Clinical Excellence in 1999, and on 1 April 2005 joined with the Health Development Agency to become the new National Institute for Health and Clinical Excellence (still abbreviated as NICE).

NICE publishes guidelines in three areas.