Can you clarify your question a little more? If you’re asking whether a home patient can get an in-center HD treatment at a different clinic, it depends. If you’re traveling, you can do dialysis at a different in-center clinic. You can use your insurance and/or Medicare to pay for it. If your other insurance is primary and refuses to pay, the clinic can bill Medicare for 80% with the other insurance denial. You’ll be left owing the 20% but for a short time, it may be worth the extra money to travel. If your Medicare is primary, unless you have a Medicare Advantage plan, you can go anywhere for dialysis.
So far as routine back up dialysis, the dialysis clinic that has trained you to do home dialysis is the facility that is responsible for providing in-center dialysis to you if you have a problem at home or if your partner needs a break. This is part of the responsibility of a home training program. It could help you arrange for a closer clinic to provide your dialysis temporarily if there’s a problem with your machine or your partner needs a break and you live some distance from their clinic. This would be like traveling dialysis.
As “kidney nurse” said, the reason why most dialysis clinics administer IV iron at the dialysis clinic is safety. The FDA has not approved any IV iron to be self-administered as far as I know and I’ve checked. It would be easier for the clinic to let patients self-administer just like it would be easier for patients not to have to go to a hospital or dialysis clinic to get their IV iron. However, if a patient stopping breathing while getting their iron IV, being away from trained staff and emergency equipment would drastically increase the odds that the patient would die. No one wants that. If some clinics have chosen to allow patients to administer their own IV iron, when the first patient has an allergic reaction, stops breathing and dies or is in a coma, people (including the family’s lawyer) will ask how clinics could have allowed patients to self-administer and every dialysis clinic again require patients to get IV iron where they can be monitored by healthcare providers.