If you're looking for something brewed locally, check out Bluejacket, which is easily Metro accessible (use the Navy Yard stop). The food is OK, but the beer is good. Also, Right Proper recently opened a production brewery in NE DC (they have a brewpub in Shaw also). It's between the Brookland and Rhode Island Ave. Metro stops. It's BYOF, but there is a really good pizza place (Menomale) nearby. If you're just looking for a place with a good beer selection, I recommend Churchkey, Pizzeria Paradiso, Brookland Pint, or Scion. All are pretty Metro accessible. If you are into Belgian beers I highly recommend The Sovereign in Georgetown, but you will probably want to Uber there.
I wish your wife the best of luck with her treatment.