Arbor Pet Clinic in Lodi. Dr. Turner is great... bedside manner is a bit odd, but UC Davis gets second opinions from him. Phone number: 209.334.4257
He's a member of ARAV (I fixed Merlin's link above). He will sometimes make housecalls if needed, and with a Sulcata, it almost always is. LOL. We're over an hour from the doc, but he's worth it. I take my Iguana there, and my brother takes his Bearded Dragons there too.
My mother has 2 adults; 125 lbs and 200 lbs. You can read their introductory thread and see photos
here.
Welcome to HCN, by the way! (I'll post some questions in your intro thread.)