Preferred Homecare Delivered a Respronics O2 Concentrator Millennium model . According to the Insurance Co ( H P N ) They are switching to a new Durable Medical Equipment Supplier. The old provider, Apria Health Care, (They were a great company to do business with, no problems with them). .Health Plan NV states this will be a transparent deal with no changes. .I finally get delivery of the O2 Gen, Great. Three weeks later here comes an invoice from Preferred Homecare $70.32. I call the 800 # talk to billing, Stating Why was I not told about a... read full review »