In general, I do not advise looking for an evaluator in the phone book. Word of mouth is how I get virtually all of my business and how most of my colleagues who are specialists also do. Talk to people you know who are "tough customers" and find out who they have had good working relationships with.
This is a field where there is a very broad range in terms of practitioner skill, and if you are talking about a child who is potentially twice-exceptional, you really need someone with experience in that field. Most psychologists are not trained in gifted issues at all, and most neuropsychs are trained around traumatic brain injury, stroke, dementia, outre genetic syndromes, etc, but again, not around learning disabilities in smart kids. Kids are often coming to me after someone else has, um, not done a very good job. Sigh.
