Yep.
How 'bout Point Lookout? Johnsons Island? Elmira? Castle Williams? Fort Lafayette? Fort Warren? Fort McHenry? Rock Island? Benton Barracks? Camp Morton? Camp Chase? Chase? Camp Randall? Camp Douglas? or Camp Butler?
The Confederacy lacked food and medicine thanks to union blockades and war against civilians, they were even willing to pay Lincoln in gold for medicine, and to simply release prisioners without exchange. The offers were refused. What was the Union excuse for all the Confederate POW deaths?
I know of one man' account who was captured and the Yankees cut the back out of his newly acquired jacket before sending him and his twin brother to Elmira, NY. He survived, but his brother froze to death. His account was the men would huddle in a mass and the ones who were sickly or too weak and couldn't force their way into the inner of the mass would freeze to death. The men were left exposed to the North's winter weather.
The North had the resources - they just didn't care.