No but I live in Virginia fairly close. Silver Spring is fairly high end these days. What are the center names/addresses? And would you access the centers on foot or via a vehicle?
I would have zero concerns walking from the metro station to this center:
DaVita Silver Spring Dialysis
8040 Georgia Ave Ste 150, Silver Spring, MD 20910
No issues with this one as well:
DaVita Selim Downtown Dialysis
Fenton St #238, Silver Spring, MD 20910
I'd look at their scores here and pick one that has the higher ratings:
https://data.medicare.gov/data/dialysis-facility-compareThe DaVita Silver Spring Dialysis is four star so that looks fine...