The rules are this. You have 60 days to elect the coverage and then 45 days to pay the premium. Remember - that's 45 days from the day you elect it. (a maximum total of 105 days) You'll have to pay the back premiums and then monthly. You should have a 30 day grace period each month. (but it depends on how the group pays their premiums)
The other thing you have to remember is to abide by the rules of the plan. If you're on a PPO, ALWAYS ALWAYS ALWAYS use network contracted physicians and facilities. If you go out of network, you'll not only have to pay higher percentages but will be subject to Usual & Customary.
While COBRA may not be cheap, it will be cheaper than paying retail for that procedure.
I agree with even tho COBRA is expensive it is MUCH less than surgeries or even some of the more expesive tests..Justin's MRI/MRA was about 10,000. We had to pay COBRA for a couple months and for our family of 3 it was about 1300, which of course was tough since you usually need it when you are in between jobs.
One thing about PPO, we've had it for most of Justin's life, is IF you want to go out of network, you can try to get it approved IN ADVANCE and chances are if you have a good reason it will be coverred the same as if you were in network, it may take jumping thru some hoops tho. We live in Nj and Justin had heart and arm surgeries in PA, delaware and a appt in Boston with 2 days of testing. since we contacted them in advanced and got in WRITING it was oked, we had normal copays