I list one: Reliance Medical Inc at 400 N Erma Ave. It is enrolled with Medicare to supply CPAP machines.
I don't list another CPAP supplier within 100 miles of Presidio.
The supplier I list in Presidio is enrolled with Medicare to supply home medical equipment. I checked its address and phone number against Medicare's supplier file.
Medicare also lists it for oxygen and hospital beds.
Being listed here is not a recommendation. It also doesn't mean a supplier takes your plan. Call to check what they accept and what they have in stock. This site is free for patients.