Dad is 83yo vet who has a service connected disability though has a 0% disability rating. We have fought that for years and STILL waiting. In the meantime, he pays social security monthly for health insurance and yet VA still charges him 50 dollars each doctor visit and there are like 2 a week. We asked why they don't bill Medicare as secondary and were told since they both are govt programs they can't do that. What can we do?