The National Clinical Assessment Service (NCAS) is an organisation that works towards the resolution of concerns about professional practice in healthcare settings across the United Kingdom. By providing their expertise to assist healthcare organisations and individuals resolve concerns, the work of NCAS contributes to improved patient safety. It currently has 70 staff, operating as a division of NHS Resolution. It can receive up to 1,000 new referrals each year. At any one time NCAS can be dealing with more than 500 active cases, which the service can often manage from referral to resolution.