What types of information might be discoverable but not admissible in a malpractice negligence case?

In a malpractice negligence case, discoverable but not admissible information may include certain privileged communications, such as attorney-client communications or doctor-patient confidentiality, which are protected to encourage open dialogue. Additionally, information that is considered hearsay or irrelevant to the specific case may be discoverable during the discovery phase but not permissible as evidence in court. Prior unsubstantiated claims or disciplinary actions against a professional, while discoverable, might also be ruled inadmissible if deemed prejudicial or not directly related to the case at hand.