Chronic Renal Failure

There was a patient in the hospital today that I had seen many times before, and always came in and almost immediately went to get dialysis. The patient was NPO because they forgot to order a diet for him after he completed his testing, so needless to say, when I went in to speak to him, he was already in a pretty bad mood and starving from his 24 hour NPO status. The diet hadn't been ordered yet, so I just went off the fact that he was probably on a renal diet. I had looked at his chart it said he was no longer on dialysis, but it was pretty ambiguous, because it also said he was on dialysis in another place in the chart. I asked the RN and she wasnt' sure either. The patient informed me that he was no longer on dialysis. His kidney function labs were WNL. His chart noted that he has chronic renal failure, so I'm not entirely sure what happened. As far as I know, there is no way to regain normal kidney function if there is chronic renal failure? Has anyone else heard differently? The only idea I have is that his chart may have noted chronic renal failure when it was supposed to say acute. He has a history of crack cocaine use, so maybe that triggered his renal failure? I was confused, because the MD didn't order any type of renal diet for the patient, and based on his labs being WNL, I wasn't going to argue it. The patient was not complying with a renal diet at home anyway, or his diabetic diet for that matter, so a day or so in the hospital won't really change anything.