I have the Inogen G4 Portable (pulse flow) and DeBliss (continuous flow to use with my CPAP machine). Both are contracted directly through Inogen and both required a 5 year contract and physician order. When my 5 year contract with Inogen is up, I am going to contract with a local supplier. A local supplier will provide oxygen tanks in the event of an emergency or equipment failure. Inogen will not and it takes several days to get replacement equipment from Inogen. Inogen will not upgrade your equipment to a newer model during your contract time. I have 2 batteries for the portable.

Airlines have different policies about taking oxygen concentrators on the plane. I usually fly Delta. Delta requires that you submit their form to get approval to take the portable on the plane. This is done through email in advance. Have a copy of the approval the day you travel. Keep in mind that the airlines pressurize the cabin to 8,000 feet. My health has improved so I don't need oxygen at home with light activities at 4500 feet, but I do need oxygen on the plane or traveling to higher elevations.

The oxygen concentrators need to be in their own bin through security. Sign up for wheelchair when you book your flight.

Original Medicare and Medigap Plan F pay for both concentrator's and supplies.