Full timing and health insurance coverage

We have our doctor provide us with prescriptions and orders for blood work that is necessary to comply with prescriptions and Medicare. We don't use an insulin pump but this has worked for other things. I think the rule is that you must see a provider that cares for other people on insulin pumps, not necessarily the doctor you always see. I have used Medicare all over the country and never had a problem. I think Medicare and the primary physician could figure this out. Thank you for helping. I've been there with my Mom and it's overwhelming!