Elevated liver enzymes fr 6mos. No alcohol no medications. Not hep a.B.C CMV & ebv. Autoimune & u/s neg- not wilson not hemochro not alpha1 antripsin?

Possible fatty liver. If you are not on any medication or taking any herbal supplements that can cause elevated liver enzymes, the most likely diagnosis would still be non-alcoholic fatty liver disease ("fatty liver") even with a normal sonogram. Other imaging studies could confirm this, but the most definitive way to diagnose the cause is a liver biopsy.