In addition to deductibles and co-pay you need to look at Maximum "Out-of-Pocket" amounts both in and out of network. You also need to be clear on what you are paying for the premiums monthly/per paycheck.
If you've had heart procedures and are likely to need more in the future than the Max Out-of-Pocket numbers could be important to you.
As an example of how this can work I offer the following:
A couple of years ago my DH had an emergency appendectomy with complications that required follow up surgery. We went through his deductible, hit the Max on his "out of pocket" in network, and then thanks to the emergency room not having ANY in-network anesthesiologists, we also were hit with a separate "out-of-networkm out-of-pocket" limit. It was ugly :/
So price-wise our coverage worked like this:
approx $550 a month towards premiums (this was for a family of three at the time)
$3,000 deductible
$7,500 out of pocket max
$an additional several thousand paid towards out-of-network, out-of-pocket max (can't remember the exact number because I spent several months negotiating it down because he was dying and we didn't have time to get an in-network person for his surgeries.)
If you are single, and have a low premium AND low deductible (which $500 is) and have low MAX numbers it could work in your favor. But if you have a $500 deductible and 20k max and need heart surgery it could really hurt you.
Just run your numbers.
Also, if the insurance comes with your job then chances are your previous surgeries would not effect your premium, but if the employer self-insures then you might run into issues with premium pricing after you establish medical history with that insurer - but that would likely effect the rates for the whole company and not just you as an individual (though I'm not as clear on that- I only know enough to be dangerous.) If ACA gets repealed (likely) it will also depend on which state your job is located in - different states mandated different ways of organizing coverage pre-ACA.
Best of luck with your decision!