Do I really need a new CPAP machine?

I'm new here and have a couple of questions! I was diagnosed with sleep Apnea roughly 5-8 years ago. I was going with Lincare as my supplier for many years but when I tried to order supplies last week, I was informed that my account was deactivated and I would have to call billing to get my account reactivated. Long story short, after waiting nearly 2 hours for billing to answer my call I gave up. I called my sleep specialist and they referred me to Apria. I looked up this company and found it was the same company Prexar (correct spelling) that many have warned me to avoid. I also read online reviews of Apria from many unsatisfied former customers and current customers who are trying to leave Apria. I called my sleep specialist to see if I can be set up with someone else. The nurse asked why and I told her that I have friends who had bad experiences with this company. Today I get a phone call from Apria to get a new CPAP and am trying to contact my doctor to see if it is medically necessary for a new CPAP machine. I've had my machine (a REMStar Pro M series) for a long time and would rather stay with it and get new supplies than a brand new CPAP machine. Apria said in the message that they require that I give them a credit card number in order to get it delivered which I don't feel comfortable giving to them especially reading about people who had mysterious charges from them appear on their credit card and some have accused Apria of billing then for money that was paid by their insurance company. I don't want to do business with Apria but my doctor has already sent over the paperwork. Is there a way I can get out of this? I don't think I need a new CPAP machine and would rather just buy supplies for my current machine. Has any had positive experiences with Apria/Prexar? There are plenty of complaint boards online of people who wouldn't recommend this company to anyone. My health Insurance company will not cover online companies but I may be better off with these online companies especially since it seems my doctor wants to set me up with Apria and with the paperwork already sent to them and them calling for an appointment, I may be stuck with Apria. I would like to switched to another supplier, attempt to contact Lincare again, or simply order online. I had a company in mind that is covered by my insurance company and has decent reviews but my doctor either didn't get my message that I didn't want Apria or is determined to set me up with Apria even though I indicated I'm uncomfortable with this company. What can I do? Another reason I don't trust having someone automatically bill my credit card is because a company tried to rip me off when I switched to Lincare. They called and said that since I was going to Lincare, they want "their" machine back or for me to compensate them. I spoke with my insurance company and found out they don't own this machine and they purchased the machine a couple months ago and shouldn't be asking me to return a machine that wasn't theirs. In addition, Lincare had billing issues and if they had my credit card, they probably would have charged these fees to my credit card. The company I switch to Lincare from would also charge my credit card in the dispute over the ownership of my CPAP machine. I don't want to switch doctors and am concerned I will be charged a fee for canceling service with Apria before even meeting for our first appointment. Has anyone had a supplier require a credit card in order to get a machine? Why would it be medically necessary for me to get a new CPAP machine if the one I currently use works fine and just needs supplies?

You don't have to use Apria if you don't want to. Just tell them you don't want to get anything from them.
I did that to my first DME who ticked me off. They wanted to know if I was refusing treatment....and I told them "no, I am not refusing treatment...I am just refusing to do business with you and I will go elsewhere for my equipment".

Since you have another DME in mind and you know that your insurance will work with them just call the doctor and tell them you want so and so DME and ask for the paperwork to be sent to that DME.
It's your choice...you get to use (or not use) anyone you want.
You shouldn't have to explain anything to anyone. It's no different than choosing a pharmacy to get prescription meds filled at. It's your choice.

It would be better if your doctor just gave you the RX and let you take it to the DME of your choice.
That's what I would ask for if it were me. It's your RX and your right to have a copy of it and you will need it to order masks online (should you want to do that).

Call your insurance company and find out what DMEs in your area are in Network. Then get a copy of your prescription from your doctor. You also should have a copy of your original Sleep Study. Your doctor cannot dictate where you get your equipment. Worst case scenario...you pay out of pocket at out sponsor
cpap.com or secondwindcpap.com. Never give your credit card to Apria...there is no reason to do so. Your old machine may still be servicable , but with the newer units you can monitor your therapy.

Start with your insurance company and find out who you can go with and what your coverage is. Your machine could break down at any time - mostly they were designed to last only 5-8 years. My brother's was running great, but we have since learned that his old machine was not providing the proper pressure (settings were correct) any longer. Still, we are keeping it as a backup in case of any issues with the new machine.

What I find bothersome in your discussion is that your doctor's office sent your medical information to Apria after you specifically told them that you didn't want to deal with Apria. They did not have your authorization to share your medical information.