here below 200 is normal. his doctor probably gave him a diet plan to help bring it down and medication for instance I am on lipitor and don't need a diet plan because my Diabetic 2 diet plan is also one of I think 3 diet plans that are given to those with high cholesterol.

there is nothing you can do specifically for your dad. its basically up to him to follow the diet plan and medication that his physician gave him and soon he will be back in normal range with his cholestorol.