I don't know where you practice, but it's a fact that there are still a significant number of the population who are covered by traditional Medicare, and I may be wrong, but I believe that Medicare does not require any of the above for you to participate.
If you participate with Medicare it will allow you to see a significant number of patients in the office, at facilities, in their homes, etc. It will also allow you to obtain a DME number and dispense diabetic therapeutic shoes when indicated, Richie braces, etc. If you already participate with Medicare, you've got to start looking harder for patients.....they are out there.
Additionally, you can start knocking on doors. Find out if there are any practices in your area that are busy and don't provide services that you may be willing to provide. As I stated already, we have a doctor who has his/her own practice, but we send this doctor housecalls (and the doctor bills these him/herself) and does some nursing home work for our practice, billed through our office.
You may be able to get on the insurance companies through their office to provide services for THEM, to supplement your income. If you approach these practices with a positive attitude, and show them that YOU can increase THEIR revenue by providing services they may not be offering such as home visits, nursing home services, etc., it may peak their interest.
I assure you that you're not the only one in your situation. So you have two choices if you don't obtain a residency. You can complain about not having the ability to get on the companies, or you can pull up your boot straps and get creative when it comes to finding a way to put food on your table.
There are plenty of Medicare patients that need podiatric care. Obtain a DME number and start getting acquainted with some of your peers locally who may be your best resource.