Oxygen concentrators are sometimes covered on Medicare, but it depends on the patient's coverage. “If you qualify for supplemental oxygen at night that’s almost always covered by insurance companies, including Medicare,” Dr. Rizzo says. But accessing a portable oxygen concentrator, depending on coverage, can be more difficult for patients who require the device. “What happened with Medicare is the amount that they cover with any oxygen device has become a set amount,” Dr. Rizzo says. Home care companies can provide people oxygen for less with a portable gas tank versus liquid oxygen, Dr. Rizzo adds, so this influences whether the device will be covered or not.