[350]*350Cavanagh, C.J.
We granted leave in this medical malpractice case to determine whether the physician-patient privilege was violated when defense counsel conducted an ex parte interview with the injured plaintiff’s treating physician. We have concluded that no violation occurred, and we affirm the judgment of the Court of Appeals.
i
Joseph Rowe, M.D., performed a total abdominal hysterectomy and a right salpingo-oophorectomy (removal of fallopian tube and ovary) on Carol Domako. There was a large fibroid tumor on the lower anterior of Domako’s uterus. Domako was discharged from the hospital on January 14, 1985, and shortly thereafter began experiencing urinary incontinence. The cause was later determined to be a vesico-vaginal fistula, an abnormal passage between the bladder and the vagina resulting from a hole in the bladder. Dr. Rowe referred Domako to Dr. Abbassian, a urologist, for repair of the fistula. Dr. Abbassian successfully repaired the fistula during surgery performed on April 17, 1985. After the second postoperative visit, Domako did not see Dr. Abbassian again.
On February 21, 1986, Domako filed a suit, alleging negligence by Dr. Rowe; Domako’s husband raised a loss of consortium claim. The liability issue concerned whether Dr. Rowe had perforated the bladder during the hysterectomy, thereby causing the fistula, or whether the fibroid tumor pressing against the surface of the bladder caused a depletion of blood and a subsequent weakening of the bladder wall. In the initial stage of discovery, defense counsel subpoenaed relevant medical records. The request for Dr. Abbassian’s medical records was made under MCR 2.310. Domako signed the authorization forms, and the records [351]*351were received. Plaintiff made no objection to the request. Defense counsel then met ex parte with Dr. Abbassian on April 13, 1987. At that meeting Dr. Abbassian explained his treatment and that he believed the cause of the fistula was ischemic necrosis, meaning that it had not been caused by any negligent actions by Dr. Rowe during the hysterectomy. Dr. Abbassian agreed to testify to that opinion at trial.
Mediation of the matter occurred on August 4, 1987, and the defendants set forth in their mediation summary that Dr. Abbassian would be giving opinion testimony regarding the cause of the fistula. The plaintiffs accepted the mediation evaluation of $35,000, but Dr. Rowe rejected it. On November 19, 1987, the plaintiffs filed their witness list which included Dr. Abbassian. The defendants also included Dr. Abbassian on their witness list, declaring him an expert witness since they intended to elicit opinion testimony regarding the cause of the fistula. Again, no objection was received from the plaintiffs.
On April 6, 1988, five days before trial was set to begin, the defendants were scheduled to conduct a de bene esse deposition of Dr. Abbassian because the doctor had a heart condition and they sought to avoid the stress of testifying in person during trial. The plaintiffs did not object in advance. At the deposition, however, the plaintiffs’ attorney stated that he had just become aware of the ex parte contact between Dr. Abbassian and the defendants, and he immediately asserted the physician-patient privilege. The plaintiffs’ counsel accused Dr. Abbassian of betraying the physician-patient privilege and threatened a lawsuit for breach of privilege. Dr. Abbassian then refused to continue, and the deposition was adjourned.
Defense counsel filed an emergency motion to bar the plaintiffs from introducing any evidence at [352]*352trial of Domako’s medical condition1 or, alternatively, for a determination that Domako had waived any physician-patient privilege. At the hearing on the motion, plaintiffs’ counsel stated that he did not object to Dr. Abbassian’s testimony except with regard to that testimony concerning the standard of care. The trial court held that the plaintiff had waived the physician-patient privilege and that Dr. Abbassian could testify about his repair and the cause of the fistula.
During trial, the plaintiffs called Dr. Abbassian as a witness, and he testified that the fistula had been caused, not by any negligence of Dr. Rowe, but by the large fibroid tumor pressing against the plaintiff’s bladder causing decreased blood flow and deterioration of the tissue. The jury returned a verdict of no cause of action in favor of the defendants. The trial court denied with prejudice the plaintiffs’ motion for judgment notwithstanding the verdict and, alternatively, for a new trial. The Court of Appeals affirmed, 184 Mich App 137; 457 NW2d 107 (1990). The Court of Appeals also issued an order, pursuant to Administrative Order No. 1984-2, which certified that the opinion was in conflict with Lawrence v Bay Osteopathic Hosp, Inc, 175 Mich App 61; 437 NW2d 296 (1989), and Jordan v Sinai Hosp of Detroit, Inc, 171 Mich App 328; 429 NW2d 891 (1988).
This Court granted leave to appeal, limited to whether the physician-patient privilege was violated when defense counsel conducted the ex parte interview with the plaintiff’s treating physician. A number of interested groups were permitted to appear as amici curiae in this matter.
[353]*353II
The process of discovery is extensively addressed by the Michigan Court Rules of 1985. The scope of discovery is outlined in MCR 2.302(B)(1) which provides: "Parties may obtain discovery regarding any matter, not privileged, which is relevant to the subject matter involved in the pending action . . . Since any relevant, nonprivileged information is discoverable, and plaintiffs do not contest the relevance of the information sought from Dr. Abbassian, the information could only be shielded from discovery on the basis of privilege.
The applicable privilege is the physician-patient privilege created in this state by statute. At the time of the proceedings in this case, MCL 600.2157; MSA 27A.2157, provided:
No person duly authorized to practice medicine or surgery shall be allowed to disclose any information which he may have acquired in attending any patient in his professional character, and which information was necessary to enable him to prescribe for such patient as a physician, or to do any act for him as a surgeon: Provided, however, That in case such patient shall bring an action against any defendant to recover for any personal injuries, or for any malpractice, if such plaintiff shall produce any physician as a witness in his own behalf, who has treated him for such injury, or for any disease or condition, with reference to which such malpractice is alleged, he shall be deemed to have waived the privilege hereinbefore provided for, as to any or all other physicians, who may have treated him for such injuries, disease or condition . . . .[2]
The statute provides protection for information [354]*354relayed by the patient to the physician, and it also provides for a waiver of the privilege when the plaintiff "producefs] any physician as a witness in his own behalf ” in a malpractice action. Similarly, the Michigan Court Rules offer protection for medical information:
When a mental or physical condition of a party is in controversy, medical information about the condition is subject to discovery under MCR 2.310 to the extent that . . . the party does not assert that the information is subject to a valid privilege. [MCR 2.314(A)(1)(b).]
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[350]*350Cavanagh, C.J.
We granted leave in this medical malpractice case to determine whether the physician-patient privilege was violated when defense counsel conducted an ex parte interview with the injured plaintiff’s treating physician. We have concluded that no violation occurred, and we affirm the judgment of the Court of Appeals.
i
Joseph Rowe, M.D., performed a total abdominal hysterectomy and a right salpingo-oophorectomy (removal of fallopian tube and ovary) on Carol Domako. There was a large fibroid tumor on the lower anterior of Domako’s uterus. Domako was discharged from the hospital on January 14, 1985, and shortly thereafter began experiencing urinary incontinence. The cause was later determined to be a vesico-vaginal fistula, an abnormal passage between the bladder and the vagina resulting from a hole in the bladder. Dr. Rowe referred Domako to Dr. Abbassian, a urologist, for repair of the fistula. Dr. Abbassian successfully repaired the fistula during surgery performed on April 17, 1985. After the second postoperative visit, Domako did not see Dr. Abbassian again.
On February 21, 1986, Domako filed a suit, alleging negligence by Dr. Rowe; Domako’s husband raised a loss of consortium claim. The liability issue concerned whether Dr. Rowe had perforated the bladder during the hysterectomy, thereby causing the fistula, or whether the fibroid tumor pressing against the surface of the bladder caused a depletion of blood and a subsequent weakening of the bladder wall. In the initial stage of discovery, defense counsel subpoenaed relevant medical records. The request for Dr. Abbassian’s medical records was made under MCR 2.310. Domako signed the authorization forms, and the records [351]*351were received. Plaintiff made no objection to the request. Defense counsel then met ex parte with Dr. Abbassian on April 13, 1987. At that meeting Dr. Abbassian explained his treatment and that he believed the cause of the fistula was ischemic necrosis, meaning that it had not been caused by any negligent actions by Dr. Rowe during the hysterectomy. Dr. Abbassian agreed to testify to that opinion at trial.
Mediation of the matter occurred on August 4, 1987, and the defendants set forth in their mediation summary that Dr. Abbassian would be giving opinion testimony regarding the cause of the fistula. The plaintiffs accepted the mediation evaluation of $35,000, but Dr. Rowe rejected it. On November 19, 1987, the plaintiffs filed their witness list which included Dr. Abbassian. The defendants also included Dr. Abbassian on their witness list, declaring him an expert witness since they intended to elicit opinion testimony regarding the cause of the fistula. Again, no objection was received from the plaintiffs.
On April 6, 1988, five days before trial was set to begin, the defendants were scheduled to conduct a de bene esse deposition of Dr. Abbassian because the doctor had a heart condition and they sought to avoid the stress of testifying in person during trial. The plaintiffs did not object in advance. At the deposition, however, the plaintiffs’ attorney stated that he had just become aware of the ex parte contact between Dr. Abbassian and the defendants, and he immediately asserted the physician-patient privilege. The plaintiffs’ counsel accused Dr. Abbassian of betraying the physician-patient privilege and threatened a lawsuit for breach of privilege. Dr. Abbassian then refused to continue, and the deposition was adjourned.
Defense counsel filed an emergency motion to bar the plaintiffs from introducing any evidence at [352]*352trial of Domako’s medical condition1 or, alternatively, for a determination that Domako had waived any physician-patient privilege. At the hearing on the motion, plaintiffs’ counsel stated that he did not object to Dr. Abbassian’s testimony except with regard to that testimony concerning the standard of care. The trial court held that the plaintiff had waived the physician-patient privilege and that Dr. Abbassian could testify about his repair and the cause of the fistula.
During trial, the plaintiffs called Dr. Abbassian as a witness, and he testified that the fistula had been caused, not by any negligence of Dr. Rowe, but by the large fibroid tumor pressing against the plaintiff’s bladder causing decreased blood flow and deterioration of the tissue. The jury returned a verdict of no cause of action in favor of the defendants. The trial court denied with prejudice the plaintiffs’ motion for judgment notwithstanding the verdict and, alternatively, for a new trial. The Court of Appeals affirmed, 184 Mich App 137; 457 NW2d 107 (1990). The Court of Appeals also issued an order, pursuant to Administrative Order No. 1984-2, which certified that the opinion was in conflict with Lawrence v Bay Osteopathic Hosp, Inc, 175 Mich App 61; 437 NW2d 296 (1989), and Jordan v Sinai Hosp of Detroit, Inc, 171 Mich App 328; 429 NW2d 891 (1988).
This Court granted leave to appeal, limited to whether the physician-patient privilege was violated when defense counsel conducted the ex parte interview with the plaintiff’s treating physician. A number of interested groups were permitted to appear as amici curiae in this matter.
[353]*353II
The process of discovery is extensively addressed by the Michigan Court Rules of 1985. The scope of discovery is outlined in MCR 2.302(B)(1) which provides: "Parties may obtain discovery regarding any matter, not privileged, which is relevant to the subject matter involved in the pending action . . . Since any relevant, nonprivileged information is discoverable, and plaintiffs do not contest the relevance of the information sought from Dr. Abbassian, the information could only be shielded from discovery on the basis of privilege.
The applicable privilege is the physician-patient privilege created in this state by statute. At the time of the proceedings in this case, MCL 600.2157; MSA 27A.2157, provided:
No person duly authorized to practice medicine or surgery shall be allowed to disclose any information which he may have acquired in attending any patient in his professional character, and which information was necessary to enable him to prescribe for such patient as a physician, or to do any act for him as a surgeon: Provided, however, That in case such patient shall bring an action against any defendant to recover for any personal injuries, or for any malpractice, if such plaintiff shall produce any physician as a witness in his own behalf, who has treated him for such injury, or for any disease or condition, with reference to which such malpractice is alleged, he shall be deemed to have waived the privilege hereinbefore provided for, as to any or all other physicians, who may have treated him for such injuries, disease or condition . . . .[2]
The statute provides protection for information [354]*354relayed by the patient to the physician, and it also provides for a waiver of the privilege when the plaintiff "producefs] any physician as a witness in his own behalf ” in a malpractice action. Similarly, the Michigan Court Rules offer protection for medical information:
When a mental or physical condition of a party is in controversy, medical information about the condition is subject to discovery under MCR 2.310 to the extent that . . . the party does not assert that the information is subject to a valid privilege. [MCR 2.314(A)(1)(b).]
Just as in the privilege statute, the court rules provide for the waiver of the physician-patient privilege. MCR 2.314(B)(1) clarifies the procedure by which the patient waives the privilege: "The privilege must be asserted in the party’s written response under MCR 2.310. A privilege not timely asserted is waived in that action . . . .” The Staff Comment declares that this section requires a party to decide at the discovery stage whether to assert the privilege. Unlike other forms of litigation, a case involving medical malpractice cannot proceed without evidence of the physical or mental condition of the plaintiff. Therefore, requiring the plaintiff to decide whether to assert the privilege at the discovery stage, rather than at trial, promotes efficient use of judicial resources by fostering an early resolution of this issue.
The purpose behind the physician-patient privilege is to protect the confidential nature of the physician-patient relationship and to encourage the patient to make a full disclosure of symptoms and conditions. Gaertner v Michigan, 385 Mich 49, 53; 187 NW2d 429 (1971); Schechet v Kesten, 372 Mich 346, 351; 126 NW2d 718 (1964); 81 Am Jur 2d, Witnesses, § 231, p 262. The purpose of provid[355]*355ing for waiver is to prevent the suppression of evidence. La Count v Von Platen-Fox Co, 243 Mich 250, 253-254; 220 NW 697 (1928) ("waiver . . . [is] to prevent the suppression of evidence by one seeking aid of the law in securing compensation for a personal injury”). An attempt to use the privilege to control the timing of the release of information exceeds the purpose of the privilege and begins to erode the purpose of waiver by repressing evidence. Both consequences are anathema to the open discovery policy of our state. The statute and the court rule both allow waiver, thus striking an appropriate balance between encouraging confident disclosure to one’s physician and providing full access to relevant evidence should a charge of malpractice follow treatment.
The rules in Michigan allow the assertion of the physician-patient privilege at various stages of the proceedings.3 The court rules do permit, however, an implied waiver when the patient fails to timely assert the privilege. MCR 2.314(B)(1) requires that the party assert the privilege "in the party’s written response under MCR 2.310,” and MCR 2.302(B)(1)(b) requires the assertion of the privilege "at the deposition.” The penalty for not timely asserting the privilege, under either of these court rules, is to lose the privilege for purposes of that action. The rules obviously recognize that
[356]*356it is patently unfair for a party to assert a privilege during pretrial proceedings, frustrate rightful discovery by the other party, and then voluntarily waive that privilege at trial, thereby catching the opposing party unprepared, surprised, and at an extreme disadvantage. Thus the rule requires that a party choose between the existing privilege and the desired testimony. The party may not have both.
The rule is rational in its design because the fundamental concept behind the rule of privilege is that one should not be forced to divulge certain information, certain communications, etc. The essence of the privilege is the lack of disclosure, not the time of disclosure. [2 Martin, Dean & Webster, Michigan Court Rules Practice, Rule 2.302, p 168.]
In this case, after the defendants sought information under MCR 2.310, Domako signed authorization forms permitting the release of medical information. The privilege was not asserted, and the plain language of MCR 2.314(B)(1) declares that if the privilege is not asserted in a written response to a request to produce, it is waived for purposes of that action.4 See also Schuler v United States, 113 FRD 518 (WD Mich, 1986) (applying Michigan law). After asserting the privilege at the deposition (five days before trial), plaintiffs’ counsel then sought to waive it at the motion hearing.5 [357]*357After the patient voluntarily allows discovery of the medical information, the plaintiff is not thereafter free to assert the privilege because the plain language of MCR 2.314(B)(1) declares that the privilege is waived for that action. The rule is a logical one; after filing a malpractice action and authorizing the release of medical information, the plaintiff can no longer claim an intent to preserve the sanctity of the physician-patient privilege.6 The privilege attempts to protect confidentiality, and the voluntary disclosure of the information takes away the need for confidentiality. The court correctly determined that the privilege had been waived.
III
Having concluded that the plaintiff in this matter waived the physician-patient privilege, we must determine whether the defendant was nevertheless precluded from conducting the ex parte interview.
Some courts have held that even where the privilege is waived, discovery is limited to formal [358]*358methods of discovery.7 See Wenninger v Muesing, 307 Minn 405; 240 NW2d 333 (1976); Hammonds v Aetna Casualty & Surety Co, 243 F Supp 793 (ND Ohio, 1965); Petrillo v Syntex Laboratories, 148 Ill App 3d 581; 499 NE2d 452 (1986).8
Before the adoption of the Michigan Court Rules of 1985, it seemed to be established that a defense counsel was permitted to conduct ex parte interviews with a plaintiff’s treating physician following a waiver of the physician-patient privilege. In Gailitis v Bassett, 5 Mich App 382, 384; 146 NW2d 708 (1966), while not expressly referring to ex parte contacts, the Court found "no error in authorizing defendant’s counsel to interview plaintiff’s physician.”9 But in Jordan, supra, the [359]*359Court stated that it was not clear whether Gailitis was actually authorizing ex parte interviews or merely allowing a deposition. The Court in Jordan further opined that even if Gailitis did authorize ex parte interviews, the decision was "overruled by the new court rules.” 171 Mich App 348. We disagree.
This Court has previously recognized our state’s open discovery process. In Daniels v Allen Industries, Inc, 391 Mich 398, 403; 216 NW2d 762 (1974), we stated that "Michigan has a strong historical commitment to a far-reaching, open and effective discovery practice. In light of that commitment, this Court has repeatedly emphasized that discovery rules are to be liberally construed ... to further the ends of justice.” See also Prentis v Yale Mfg Co, 421 Mich 670; 365 NW2d 176 (1984). While Daniels was interpreting GCR 1963, 310, the Michigan Court Rules of 1985 in no way acted to restrict discovery or to modify this commitment to open discovery. Indeed, the opposite is true. We find ourselves in agreement with the statement of the Court of Appeals in this case that "the new rules were intended to further liberalize Michigan’s already open discovery process.” 184 Mich App 148-149.10 The very existence of the early waiver provision evidences further liberalization of the discovery rules. Before the Michigan Court [360]*360Rules, a party could wait until trial to waive the privilege, thereby forestalling pretrial discovery. That is no longer feasible under MCR 2.314(B)(2), which requires assertion or waiver at the pretrial stage. It would be a regression to conclude that the Michigan Court Rules of 1985 operated to preclude a method of discovery acceptable under the General Court Rules.11 Furthermore, it is routine practice, sanctioned by the Standard Jury Instructions, to talk with each witness before trial to learn what the witness knows about the case and what testimony the witness is likely to give at trial. SJI2d 2.06.
The purpose of discovery is the simplification and clarification of issues. Discovery should " 'provide accurate information in advance of trial as to the actual facts and circumstances of a controversy. . . . [It] should promote the discovery of the true facts and circumstances of a controversy, rather than aid in their concealment.’ ” Ewer v Dietrich, 346 Mich 535, 541-542; 78 NW2d 97 (1956) (citing Hallett v Michigan Consolidated Gas Co, 298 Mich 582; 299 NW 723 [1941]). Restricting parties to formal methods of discovery would not aid in the search for truth, and it would only serve to complicate trial preparation. MCR 1.105 expressly states that the court rules are "to be construed to secure the just, speedy, and economical determination of every action . ...” Ex parte interviews appear to advance each of these [361]*361aims. As recognized by other jurisdictions, "such informal methods are to be encouraged, for they facilitate early evaluation and settlement of cases, with a resulting decrease in litigation costs, and represent further the wise application of judicial resources.” Trans-World Investments v Drobny, 554 P2d 1148, 1152 (Alas, 1976). There is no justification for requiring costly depositions, for example, without knowing in advance that the testimony will be useful. The public policy of simplifying litigation and encouraging settlement militates in favor of these interviews, providing there has been a waiver of the physician-patient privilege. We agree with Doe v Eli Lilly & Co, Inc, 99 FRD 126, 128 (D DC, 1983), that "no party to litigation has anything resembling a proprietary right to any witness’s evidence. Absent a privilege no party is entitled to restrict an opponent’s access to a witness . . . .” While we recognize that the physician is different from an ordinary witness as a result of the confidential nature of the physician’s potential testimony, that confidentiality is adequately preserved by the physician-patient privilege. Once the privilege is waived, there are no sound legal or policy grounds for restricting access to the witness.12
Although the rules are silent on informal methods of discovery, prohibition of all ex parte interviews would be inconsistent with the purpose of [362]*362providing equal access to relevant evidence and efficient, cost-effective litigation. The omission of interviews from the court rules does not mean that they are prohibited, because the rules are not meant to be exhaustive. See MCR 2.302(F)(2) (permitting parties to modify the court rules to use other methods of discovery). Their absence from the court rules does indicate that they are not mandated and that the physician cannot be forced to comply, but there is nothing in the court rules precluding an interview if the physician chooses to cooperate. Furthermore, where there is a legitimate concern over the discovery of irrelevant data, the possibility of undue influence, or the threat of breach of the physician’s ethical duty, the party asserting the privilege could always establish the proper parameters for questioning through a protective order. MCR 2.302(C).
IV
We affirm the judgment of the Court of Appeals holding that the ex parte interview of the plaintiff’s physician was proper because the physician-patient privilege had been waived by lack of timely assertion. After the privilege is waived in a malpractice action, each party is entitled to equal access to relevant information subject to the restrictions against "annoyance, embarrassment, oppression, or undue burden or expense . . . .” MCR 2.302(C).
Levin, Brickley, Boyle, Riley, and Griffin, JJ., concurred with Cavanagh, C.J.