Ask again in writing, and if he does not comply, file a complaint with the Board that governs psychologists in your state. You use the term "medical records". If this person is a psychiatrist (not a psychologist) then it would be the State Medical Board of North Carolina, since pyschiatrists are MDs (medical doctors).
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In all due respec to the other responses, a psychologist is mandated by the APA not to provide records to the patient if the pracititoner believes the patient would be harmed by the disclosure. I suggest you request the practitioner to provide you with a reason for the reluctance to provide you a copy.