Creatinine level is 1.3mg/dl (range:0.8-1.3). bun/creat ratio normal, electrolytes all normal, uric acid normal, urinalysis all normal. Any concern?

No. At your age, kidney function is usually starting to drop of. And/or you may simply be physically fit and decently muscled. When I was lifting weights daily, I ran 1.7-1.8. I see you have hepatitis C and cirrhosis. See if you can get into one of these new studies with the meds that usually cure it. Best wishes.