In guidelines launched this week, SIGN said assessments have to take place at least every five years.
A risk assessment tool is being developed by NHS Scotland. It will focus on Scottish data and take into consideration family history, smoking habit and social deprivation.
The guidelines also bring statin use in Scotland in line with NICE guidance, which covers England and Wales.
Patients with a 20 per cent risk of CHD or stroke over 10 years are to be given statins.