Will accepting hospital charity for a bill affect future patient care?

My mother was on Medicare. The bills were major, mostly paid by Medicare and her insurance. I paid the balance not covered but to my surprise more bills came in a couple of months later. Now there is a bill of under $1,000 that I cannot afford. Mom is on Medicaid now. The hospital offered a charity plan that would cover the remainder of her bill. My question is what happens if she goes back to Medicare in the future (if she leaves the nh), will accepting charity affect her relationship with the hospital? Will they still treat her?