It is my understanding that if you're in the US and you're using insurance they have to use the DSM codes to have insurance pay that being said they should be using DSM criteria to meet those diagnosis. I understand your concern about being labeled I'm in the same boat my psychiatrist disagrees with my therapist and they reported two different diagnosis to my insurance company but my insurance company is the only one that sees that diagnosis besides my mental health Team so I'm not really all that concerned it just aggravates me that the psychiatrist is saying I have something that I do not believe I have. As for staying with your therapist personally I don't like the psychodynamic option but that is totally up to you do you feel that you've made progress after 6 years of seeing twice a week if not it may be time to try a different form of therapy with someone that will give you more feedback if you ask a question.