I'm not a large size, but I CAN tell you that Crest scrub tops run WAY on the large side! If they have 1x or 2x, I'd be willing to bet they'd fit fine.
I found a site that had some nice Crest tops on clearance, REALLY low prices, so I figured I'd take a try. I typically wear a medium top in other brands; sometimes a large if its small in the bust (cause I'm not, lol). According to their measurement charts, I was a medium bordering on large; I opted for one medium and one large just in case. ROFL, what a joke! The medium I could literally hold the belly part out in front of me and from the side looked nine months pregnant: it was THAT much oversized! And the large, well....I looked like I was wearing Mommy's clothes. The shoulder seams were on my deltoid on each side, and it was the most ridiculous width ever. Unfortunately it'll cost more to have it altered than the top cost to buy
SO.....check out Crest, even if the sizes aren't SUPPOSED to go higher, they sure do!