My last job's insurance plan cost me $800/mo (family) just for the pleasure of having. Even with the insurance (which changed half way through employment) things like my migraine medication was still $150/mo on top of that (before the change it was not much).

This was actually much better than the job before that because at least the company paid for my coverage (may be confusing but that's still $800/mo out of my pocket to cover my family).

So yes, just the job you choose can be rather drastic changes in take home pay due to insurance coverage, so a huge impact on what companies you decide to work for.

You can imagine the headache each year when it comes time to have to choose insurance plans again.