No, he doesn’t but he has to do what my cardiologists does to me when he checks mine, he hangs a wand over the pacemaker and a wire runs from it to a computer which allows control over the device. In other words there has to be physical contact with the pace maker. I repeat, there can be no hacking of a pace maker unless you have physical access to the person who has it installed. You can also check the pace maker over the phone, but again there has to be wires actually touching the person with the pace maker which run through a small machine, thence from there over the phone lines. I repeat...well you get the idea.
*sigh* Yes, you are absolutely right, the small signals that are broadcast through the skin cannot be broadcast through the air and then through the skin, even if you have the full resources of a Nation-State or a rural Radio Shack™.
The next time you're in your cardiologists' office have him hold the coil away from the implant and then interrogate it.