Thorn - Did you mean to say "Traditional Medicare and HMO's are
NOT the same thing? that would be correct.
Traditional Medicare is Part A inpatient care and Part B outpatient care. You can go to any doctor or hospital in the U.S. that takes Medicare (99% of doctors and hospitals). You
do not need a primary care doctor.
Add a Supplement like Plan F or Plan G and you can do all that with an annual out of pocket maximum risk of between $0 to $147.
With a PPO you are going to have a maximum out of pocket risk of between $6,700 and $10,000 depending on if you are in network or not.
PPO's still have a network like an HMO.
Some PPO's also have a monthly premium approx equal to a Medicare Supplement and have a reduced maximum out of pocket risk to around $3,500 in network, more out of network.
Please see page 17 and pp 67-73 of this 2015 Medicare & You handbook
https://www.medicare.gov/Pubs/pdf/10050.pdf See page 83 for general information on PPO's.
I too much prefer PPO's to an HMO. I truly dislike the idea of having to get permission / referral from a primary care doctor to see a specialist.
Some PPO's are called Regional PPO's and have a very large in-network area. Here in Florida there is even a PPO for snowbirds that has in-network care both locally and the state where they spend their summer months. I have no idea if other states offer that benefit.