There are risks involved with a catheterization. And in my experience, before doing the cath, the doc would require a CT scan to determine the location of blockages. So if you trust your cardiologist, I would follow his recommendations. If you don't trust your cardio, seek a second opinion.

I had similar numbers in my calcium score done in 2006. I finally became symptomatic in August 2022 and needed the catheterization and two stents in September. Your CT scan will tell you and your doc what you need. In the meantime and until you become symptomatic, it is important to keep cholesterol low and the aspirin will keep your blood from easily clotting. You may wish to see a dietician for guidance on your diet.

I wish you good health and a long life.