From my psych classes, and doing internship with a mental health agency and having DID myself I can tell you that hearing voices is a symptom of both psychosis and also a symptom of having DID, schizophrenia, bipolar and many other things too. you can ask your therapist for psych eval that can tell you exactly which disorder is the reason why you are hearing voices.

for me the voices were because I have DID not psychosis.

Dont let friends or other people who are not your therapist and psychiatrist or other people with DID try to diagnose you. that could be very harmful to you. like what if your friend is saying your voices are psychosis but it is from something else say its from not getting enough sleep or its cause you are dehydrated, or you have matastisized tumor. but because your friend says its psychosis you end up getting the wrong treatment and medication. or say it is because you have DID for which there is no medication for those kind of voices but you end up with some antipsychotic medication that you shouldnt be on. See what I mean. it could end up hurting you real bad in some real serious ways. If I was in this situation I would tell the friend sorry but you are not my doctors, therapist and psychiatrist. I will tell them what you think and ask for diagnostic tests and then my doctors, therapist and psychiatrist can tell me what my hearing voices are from. Thanks anyway for your opinion on what my problems are even though you are not my doctor, therapist and psychiatrist.

When ever I say that to my friends or family that try to diagnose without medical and psychiatric degrees and appropriate tests they appologize and back off and leave the diagnosing up to me and my treatment people.