Can someone switch from BCBS of another state to BCBSKS?
Yes this would be considered an interplan transfer.
What if the BCBS coverage I have now is an HMO?
If you are leaving the coverage area of the HMO it would qualify as a Guarantee Issue.
Can I switch to any policy I want?
If you are within six months of your Medicare Part B effective date or just turning 65, then yes, you can choose any policy you want.
Do I have to medically qualify?
If you are within six months of your Medicare Part B effective date or your 65th birthday, no. If you are over 65 or more than six months from your Medicare Part B effective date and you want to buy a policy that has more benefits than the plan you are on now, yes. If you want a policy that has the same or less coverage than your current policy, you do not have to medically qualify.