Defendants Clay, Moore, and *195Ardati appeal by leave granted from an order denying their motion for reconsideration of an opinion and order dated December 6, 1983. The order barred defendants from introducing the expert testimony of Larry E. Fleischman, M.D., plaintiff’s treating physician subsequent to defendants’ alleged malpractice.
This appeal arises from a malpractice action filed on June 10, 1981. During discovery, plaintiff learned that defense counsel had consulted Fleischman for his expert opinon on plaintiff’s medical records compiled prior to Fleischman’s treatment of plaintiff. Plaintiff moved to bar Fleischman from acting as an expert witness for defendants because "defense counsel acted in utter disregard of the General Court Rules applicable to discovery” by conferring with Fleischman on plaintiff’s file and because Fleischman "owes a fiduciary duty of confidentiality to the plaintiff.” Defendants countered that, because Fleischman would not be disclosing information gained during his treatment of plaintiff, but would be testifying only as to the applicable standard of care, defendants violated no rules of discovery and Fleischman’s testimony was not barred by the physician-patient privilege, MCL 600.2157; MSA 27 A.2157.
The trial court acknowledged that defendants could limit their questions to matters not within the physician-patient privilege. The trial court found no violation of discovery rules or ethics, and was "not persuaded that Michigan law imposes a fiduciary obligation upon a physician not to deal with the adverse party.” However, the court found that "[i]f defendants are allowed to call Dr. Fleischman, it is unavoidable that the jury would learn Dr. Fleischman was the treating physician of plaintiff.” The court concluded that plaintiff’s failure to call Fleischman would lead the jury to *196surmise that Fleischman would render testimony adverse to plaintiff but for the physician-patient privilege. The court found that the probative value of Fleischman’s testimony was outweighed by its prejudicial impact and barred Fleischman’s testimony under MRE 403.
We find this ruling to be in error. It is well-settled that the determination of whether the prejudicial impact of evidence outweighs its probative value is a matter left to the trial court’s discretion. Stachowiak v Subczynski, 411 Mich 459; 307 NW2d 677 (1981). In order to find an abuse of discretion, an order must not evidence the exercise of judgment, "but defiance thereof.” Wendel v Swanberg, 384 Mich 468, 475-476; 185 NW2d 348 (1971). Here, we will not second-guess the trial court’s determination that disclosure of the fact that Fleischman was plaintiff’s treating physician would be prejudicial to plaintiff because the fact would be given undue weight by the jury. However, the court’s method of vitiating the perceived prejudice was not within the discretion granted by MRE 403. MRE 403 does not authorize the total exclusion of a witness’s testimony, but only of evidence. The perceived prejudicial impact of Fleischman’s testimony could have been avoided by excluding any mention of the fact that Fleischman was plaintiff’s treating physician.1
Nor do we believe that Fleischman should be barred from testifying for defendants because of the fiduciary relationship between physician and patient.
In Michigan, the exclusion of testimony based on the relation between treating physician and patient has long been limited to the confines of the physician-patient privilege as defined by statute. *197See e.g., Cooley v Foltz, 85 Mich 47, 49; 48 NW 176 (1891) (proper for treating physician called by defense counsel to testify that the plaintiff told him that she was instituting suit and intended to call him as a witness). See also Yager v Yager, 313 Mich 300, 308; 21 NW2d 138, 141 (1946), People v Cole, 113 Mich 83; 71 NW 455 (1897). We see no valid policy reason to extend the limits on a treating physician’s testimony in the manner plaintiff suggests. This is founded, in part, on our belief that, if Fleischman were to testify, there would be no breach of fiduciary duty in the instant case.
A fiduciary duty arises out of the relation subsisting between two persons of such a character that each must repose trust and confidence in the other and must exercise a corresponding degree of fairness and good faith. Portage Aluminum Co v Kentwood Nat’l Bank, 106 Mich App 290, 294; 307 NW2d 761 (1981), lv den 413 Mich 922 (1982). A person in a fiduciary relation to another is under a duty to act for the benefit of the other as to matters within the scope of the relation. See 1 Restatement Trusts, 2d, § 2, Comment b, p 6. The relation between treating physician and patient, requiring confidence, trust, and good faith, is founded on the proper diagnosis and treatment of medical problems. Permitting a treating physician to testify with regard to matters traditionally not privileged should have no deleterious effect on his treatment of a patient and should have no chilling effect on a patient’s disclosures during the course of their relationship. In this manner, the policies underlying the fiduciary relationship between physician and patient, which plaintiff claims should bar Fleischman’s testimony here, and the policies underlying the physician-patient privilege statute, traditionally the only bar to a treating physician’s testimony, are closely parallel. Each advances the *198same interests, and supports the conclusion that the statute adequately protects the physician-patient relationship.
Reversed and remanded for further proceedings consistent with this opinion. We do not retain jurisdiction.
J. H. Gillis, J., concurred.The court may limit testimony in this way on remand.