Metropoliton Animal Hosp is suppose to have a herp vet, but I have never used them so I am only telling you what I know, this is not a recommendation. Anyhow, their number is 412-788-6400.
If you don't mind a drive, I use Dr. Doel, at Castle Shannon Animal Hospital (412)885-2500. It would probably take you about a half an hour to get there. I have also used a Dr. Dorn on occasion, and he is a West Liberty Animal hosp.