He's going for blood tests, not a fucking CT scan. He would need to speak to his PCP and exhibit signs that a heart attack is imminent. 
Actually anyone can go get a calcium scan on their own w/out a PCP.
I paid 150.00 and went on my own. Saw some minor calcium (decades of statins doing their job in my case) calcifying plaque.
It then kicked off lots of follow-up testing which led to an "all clear" and very healthy diagnosis. (Stress-Echo, Nuclear-Stress, etc).
Got a booklet of printouts, with images of the arteries, heart, etc. Ejection fraction was 65% which they said was perfect. (In between 55% - 70%).
Zero signs of any blockage.
I know a guy who got the calcium score and had zero calcium (and very low cholesterol levels), 6 months later he had a triple bypass. It doesn't detect soft-plaque.
The stuff that can kill you suddenly...