Depends on the state, but seems like if you're single, the individual plans in most states are around $3-500 per month with a ~$6k out of pocket max. This means annually:
-$4,800 in premiums -$11k maximum health costs
-$4,800 in premiums -$11k maximum health costs
That 'maximum health costs' also doesn't really factor in the time having to deal with insurance companies chasing up decisions they make (or don't), and for money/income lost due to no work. Insurance for that - short term disability insurance - may add another $100/month on the the equation.