I Had Graves Disease. After Destroying My Thyroid My. Endroconologist

I had Graves Disease. After destroying my thyroid my. Endroconologist discovered that Synthroid doesn't work for me. I've been on compounded T/4 T3 and have been succesful. But I need to find a new doctor that prescribes alternative meds. How to I go about finding one in my area? Erie, PA. Do they have a credential or title