I'm not a doctor, but I have 3 stents recently and a very high calcium score. IMHO stents are not pre-emptive and a calcium score is not the reason to get a stent. They are considered when you are having symptoms, such as, during normal activities tightness in the chest, bouts of lightheadedness, weakness, getting winded or out of breath easily or maybe a rapid heart rate. The only way I am aware of to know a % of how much an artery is blocked is with a catherization - go in and take a look. But again if you aren't feeling anything may not be needed. I had a very high calcium score about 4 years ago and was feeling fine for 3 1/2 years having changed my diet and taking Crestor, until I started to have issues when I was out for a hike or bike riding. My pulse would pound in my arms and neck when I was just getting started, which hadn't happened before. I had all the standard heart testing done previously and at the standard check up points and always results were good.