Hi, Just went to the doctor to get a UA for possible UTI because of pain in my lower back that s not normal. Bilirubin was negative but my urobililnogen is 4.0. I call the patient advisory nurse and she asks the er doctor. Calls me back and said the doctor just that there is no UTI but the urobilinogen could mean liver disease. I have never had any trouble with my liver. I m 39 and thst is freaking me out.