In this medical malpractice action in which the personal representative was substituted for the deceased plaintiff, the jury found by special verdict that the defendant District of Columbia provided negligent care and treatment to Joe Richbow following his surgery at D.C. General Hospital in 1976, but that the District’s negligence did not proximately cause Mr. Rich-bow’s ensuing injuries. On appeal, appellant’s primary contentions are that the trial judge should have granted her motion for a new trial on evidentiary grounds, and should not have permitted one of the deceased plaintiff’s physicians to testify as an expert witness on behalf of the defendant. We affirm. 1
*1065 I.
In May of 1976, staff at D.C. General Hospital removed a pre-cancerous tumor known as a villous adenoma from the colon of Joe Richbow, who was then 63 years old. 2 He was released from the hospital, and the insufficiency of the follow-up care offered or provided by D.C. General gave rise to the jury’s finding of negligence. Nearly four years after the operation, Mr. Richhow complained to a physician treating him for another illness that he was experiencing rectal bleeding of the kind that had resulted in the first operation. The physician referred Mr. Richbow to Dr. Warren Strudwick, a general surgeon with considerable expertise in oncology. Dr. Strud-wick discovered a villous adenoma in Mr. Richbow’s colon in the same area where the previous tumor had been found. 3 Dr. Strudwick believed that this tumor, larger than the first, was probably malignant, and recommended an abdominal perineal resection and colostomy — an operation entailing removal of the affected portion of the colon, closure of the anus, and establishment of a stoma, an artificial opening in the pelvic area through which bowel waste can be excreted. Mr. Richbow submitted to this operation on April 16, 1980.
Complications immediately ensued. Over the next four years, these resulted in successive operations to improve the colostomy and the creation of a second stoma. In 1985, a new polyp was discovered in Mr. Richbow’s transverse colon. Although this was diagnosed as a non-malignant villous adenoma, the manifest failure of the colostomy and Mr. Richbow’s apparent predisposition to developing these pre-cancerous lesions caused the doctors to perform an ileostomy on him. This involved removal of the rest of the colon and attachment of the end of the small intestine to yet a third artificial opening in the pelvic wall. Still further corrective procedures were required after this operation, and Mr. Rich-bow continued to experience pain and discomfort until 1988. 4 No claim of malpractice was made against Dr. Strudwick or the doctors who treated plaintiff after 1980. Rather, the pain, expense, and embarrassment attending Mr. Richbow’s colostomy and the complications which ensued were alleged to have been proximately caused by the failure of D.C. General Hospital to provide proper follow-up care between 1976 and 1980, which would have permitted earlier discovery of the second tumor and in *1066 ferentially less radical procedures to cure it. The jury found that although D.C. General was negligent in its follow-up care, that negligence was not the proximate cause of Mr. Richbow’s injuries.
II.
Appellant did not move for a directed verdict or for a judgment notwithstanding the verdict, but argues instead that the judge should have granted her motion for a new trial on the ground that the verdict was against the weight of the evidence. This argument need not detain us long. When the trial court denies a motion made on this ground and sustains the jury’s verdict, our scope of review “is very narrow indeed.”
Felton v. Wagner,
In this case, the jury’s special verdict on causation means that it found that the District’s failure to periodically monitor plaintiff following the 1976 operation did not substantially cause the need for the colostomy operation; plaintiff would have had to undergo the same surgery whether the hospital staff furnished proper follow-up care or none at all. Appellant’s primary claim is that this finding is unsupported by an expert opinion rendered within a reasonable degree of medical certainty. We need not decide, however, whether Dr. Strudwick, whom the District called as its expert, rendered such an opinion.
5
It was plaintiff, not the defendant District of Columbia, who was required to establish the elements of the malpractice claim by expert testimony.
Washington v. Washington Hosp. Center,
Appellant introduced expert testimony through Dr. Lawrence Feinman that if the second lesion had been detected at an early stage, measures short of a colostomy would have sufficed and the extensive surgery from 1980 onward could have been avoided. There was, on the other hand, ample evidence from which the jury could resolve to reject that conclusion. Whether or not Dr. Strudwick rendered a contrary expert opinion, he made clear that
he
would have recommended the same treatment for Mr. Richbow if any size tumor had reoccurred in the portion of the colon previously affected. See note 5,
supra.
This was not merely the opinion of a doctor who taught surgery, who had been associated with the Howard University tumor clinic for over twenty years, and who had published papers on cancer, but the opinion of a physician who had actually examined and treated plaintiff and had personal knowledge of his medical history.
See Adkins v. Morton,
III.
Appellant further contends that it was error for the court to permit Dr. Strudwick to render an expert opinion on negligence and causation over the plaintiffs objection. Appellant concedes that Dr. Strudwick could properly testify as a fact witness for the defense. But she argues that permitting a non-party treating physician to testify as an expert in these circumstances violates the physician-patient privilege embodied in D.C.Code § 14-307 (1989) even if the patient does not object to the physician’s factual testimony. We find no merit in this argument.
D.C.Code § 14-307(a) provides that
a physician ... may not be permitted, without the consent of the person afflicted, or of his legal representative, to dis *1068 close any information, confidential in its nature, that he has acquired in attending a client in a professional capacity and that was necessary to enable him to act in that capacity, whether the information was obtained from the client or from his family or from the person or persons in charge of him.
Appellant, as Mr. Richbow’s legal representative, introduced copious evidence about the 1980 colostomy performed by Dr. Strudwick and the medical condition that made it necessary. Further, the District called Dr. Strudwick as a fact witness and he testified at length about his treatment of Mr. Richbow without objection by appellant. Thus we have no occasion to decide whether appellant waived the physician-patient privilege simply by instituting a medical malpractice action that put Mr. Rich-bow’s medical condition in issue.
But see Sklagen v. Greater Southeast Community Hosp.,
The physician-patient privilege, unlike the attorney-client privilege, is not a child of the common law but a creature of statute.
Clifford v. United States,
In
Abbey
we also rejected the argument that plaintiff was required to list the defendant physicians and defense witnesses in her Super.Ct.Civ.R. 26(b)(4) statement of expert witnesses she planned to call. We quoted the Advisory Committee note to Fed.R.Civ.P. 26(b)(4) that the rule “ ‘does not address itself to the expert whose information was not acquired in preparation for trial but rather because he was an actor or viewer with respect to transactions or occurrences that are part of the subject matter of the lawsuit. Such an expert should he treated as an ordinary witness.’ ”
*1069
Id.
at 335. We held that plaintiff could “question appellees as well as appellees’ witnesses as experts” despite the failure to list them under Rule 26(b)(4), because “their expertise ... was not developed in anticipation of litigation.”
Id.
In
Adkins v. Morton, supra,
we found the second holding of
Abbey
dispositive and reversed a malpractice judgment in behalf of plaintiff because the trial judge, relying on the failure to list a treating physician under Rule 26(b)(4), had barred the doctor from testifying about why he had not ordered home nursing care for the plaintiff and about his opinion why she would not need such care. “[T]he crucial inquiry,” we said, “is whether the facts and opinions possessed by the expert were obtained for the specific purpose of preparing for the litigation.”
None of these decisions involved a claim of physician-patient privilege as in this case. Nonetheless, each suggests the particular relevance of opinion testimony by physicians who form those opinions while treating a patient for injuries that later become the issue in litigation. In our judgment, there is no satisfactory basis for, on the one hand, conceding that a physician may testify about the facts of his patient’s treatment but, on the other, disputing the admissibility of an expert opinion formed in the course of, or on the basis of, that treatment (even though rendered by the physician as a paid expert). Having waived the privilege as to factual information, a plaintiff may not keep from the factfinder the medical judgments and opinions which were derived from the treatment and which indeed shaped it.
The Supreme Court of North Carolina has reached a similar conclusion in a case in which the issue likewise was whether “plaintiffs who waive their physician-patient privilege as to ‘information’ may nevertheless preclude their physicians from giving opinion testimony.”
Cates v. Wilson,
itself suggests no division between opinion and information, and no such division is necessary to give effect “to the plain sense of the text.” ... [T]he statute’s plain sense serves to protect a patient from public disclosure of the details of his relationship with his physician. A patient who discloses that which he has a right to keep confidential loses the right to claim the statute’s protection.
A second reason that we decline to adopt the divisible waiver ... is its possible misuse by plaintiffs in personal injury actions. A divisible waiver could enable plaintiffs to elicit from their physicians factual details underlying their cases and then preclude these physicians from placing this information in a legally relevant context. When a patient dissolves the fiduciary relationship with his physician by disclosing or permitting disclosure of details of their consultations, he should not, in fairness, be allowed to prevent the physician from stating an opinion which might aid the trier of fact *1070 in assessing the merits of the patient s case. To hold otherwise would enable patients to use the privilege not defensively to protect their confidences but offensively to suppress the truth in litigation.
Id.
at 16,
We agree with the North Carolina court that an implied waiver exists when the patient discloses, or permits disclosure of information gained by the physician during the physician-patient relationship,
see Clifford,
The judgment of the Superior Court is
Affirmed.
Notes
. Appellant’s other assignments of error are without merit. The denial of her summary judgment motion is not appealable,
Morgan v. American University,
Nor did the judge err in dismissing a juror for cause and replacing him with an alternate.
See
Super.Ct.Civ.R. 47(b) (1991). "A trial judge has broad discretion in deciding whether to excuse a juror for cause.”
District of Columbia v. Anderson,
Furthermore, appellant has shown no prejudice from the trial court’s innocuous
ex parte
communication with the jury. The only result of asking the jury why it wanted a dictionary was the decision of the judge, taken with the unqualified assent of both parties, to re-instruct the jury on the legal definition of proximate cause. Appellant may not complain now of the giving of an instruction to which she affirmatively assented.
See
Super.Ct.Civ.R. 51 (1991);
District of Columbia v. Mitchell,
We do not decide whether the judge abused her discretion in denying appellant’s untimely request to depose defendant’s expert. Appellant has not perfected the record in this matter.
See Cobb
v.
Standard Drug Co.,
Finally, we perceive no prejudice to appellant from the four-month delay in taking Mr. Rich-bow’s de bene esse deposition.
. Joe Richbow instituted the present action against the District of Columbia on May 27, 1988. The trial court refused to dismiss the case as barred by the statute of limitations or the mandatory notice provision of D.C.Code § 12-309 (1989), and the District has not taken a cross-appeal.
Mr. Richbow died before trial. His wife Elease Richbow was substituted as plaintiff in the action, and she brings this appeal.
. The tumor was located five to seven centimeters from the anal verge, extended about ten centimeters in length, and completely encircled the bowel.
. He died of a pulmonary embolism on January 27, 1990.
. Dr. Strudwick’s opinion on the issue of causation admits of multiple interpretations. He was asked:
Q. Do you have an opinion, with a reasonable degree of medical certainty as to whether early detection of the tumor would have permitted another method of eliminating the cancer?
A. No, not with certainty. However, because this was a reoccurrence, because he had had cancer in the same area or the villous adenoma in the same area, I would — no matter what the size, I think that I would have recommended the same type of therapy. [Emphasis added.]
A natural reading of this colloquy — perhaps the most natural reading — is that the doctor declined the invitation to render an opinion within a reasonable degree of medical certainty that early detection would have allowed another form of treatment. Or he may have meant, variously, that it could not be said to a reasonable medical certainty that early detection would have permitted another method of eliminating the cancer, or that even if detected early, the cancer could not be eliminated with certainty by any form of treatment less radical than a colostomy.
.
Meek v. Shepard,
Furthermore, given the fact that, under Adkins, a non-party treating physician may testify about opinions developed in the course of treatment, we do not believe that the fact that such a physician is also qualified as an "expert” makes his testimony more prejudicial than probative; the opposing party is always free to argue to the jury that procurement of an expert inherently affects that expert’s loyalty and judgment.
. Appellant maintains, as a variation of her argument, that the District presented no evidence to show that its negligence did not substantially cause the second villous adenoma to develop into a cancerous lesion. Not only does this argument misconceive the burden of proof, but the testimony of appellant’s own expert provided a basis on which the jury could find that the frequency of periodic monitorings would have diminished over time thus permitting the tumor to begin growth and become malignant in an interval between properly scheduled check-ups.
