Hi @stanimal

I agree with some of the other comments, if your on statins, it is probably due to the statins---which in the long run may be a good thing! I work in the Radiological and Oncology field--I am NOT dispensing medical advice, but my own opinion is I personally will not repeat Calcium scoring. I don't require authorizations for CT angiograms or any other diagnostic imaging testing--I get them free from my employer, I just need a script.
I personally believe that if you have no symptoms and are following a good diet and exercise plan...and taking your meds you are doing good as long as you are symptom free. Stress tests are also great to give people pience of mind---and it is not invasive. Ultimatatly everyone needs to make the decison of what is right for them, but don't be discouraged....a decade went by and it sounds like your doing well.
I am not a proponent of doing unnecessary testing including heart caths---many people want to do it to see if their are blockages, BUT these are not risk free and have actually seen people have complications (rare but they do happen) where they tear a vessel which requires emergency surgery. Also...you hear people advocating for CCTA...again, often unnecessary radiation exposure and can open a can of worms for incidental findings that should not be touched. IMHO (and that is all it is) if you trust your Cardiologist and PCP and you have meaningful dialogue with them about options...that is the best course of action. Too many Dr. Googles out their and site so many studies how this works and this doesn't work...go with your gut. Best of luck. BTW, I am about 51 with a CAC of 170 with no other abnormalities and no symptoms---I have friends who have it in the 1000's and are symptom free for years--it is one test of many.