Case No. 93-2084
The issue before this court in case No. 93-2084 is whether the trial court erred in giving a jury instruction on the weight to be given expert testimony. The charge to the jury instructed as follows:
“If the jury finds to be true a state of the facts materially different from that assumed as true by any such expert, then, of course, the jury should give no weight at all to the conclusions or opinions to [sic ] such expert based upon such assumed facts.”
It is well established that the jury alone, as the trier of fact, has the duty to decide what weight should be given to the testimony of any expert witness. See State v. Thomas (1982), 70 Ohio St.2d 79, 24 O.O.3d 150, 434 N.E.2d 1356. The above-cited instruction impermissibly usurped the jurors’ role in evaluating the opinions of Drs. Miller and Horwood by requiring that the jurors give such testimony no weight at all if they found it was not based on the facts. Thus, the trial court erred in so instructing this jury. The issue, however, is whether the error prejudiced the plaintiff in this case.
*93In examining errors in a jury instruction, a reviewing court must consider the jury charge as a whole and “must determine whether the jury charge probably misled the jury in a matter materially affecting the complaining party’s substantial rights.” Becker v. Lake Cty. Mem. Hosp. W. (1990), 53 Ohio St.3d 202, 208, 560 N.E.2d 165, 171. In the present case, given the nature of the experts’ opinions, the erroneous jury instruction and the evidence, we hold that the erroneous jury instruction did not mislead the jury in a matter materially affecting Kokitka’s substantial rights.
In order for the erroneous jury instruction to have been triggered, the jury had to find, as a threshold matter, that the facts were materially different from the facts assumed by the experts in their opinions. In other words, the erroneous instruction did not come into play unless the jury found facts materially different from the facts assumed by the expert doctors. If the jury did not find facts that were materially different from the facts assumed in the experts’ opinions, then the instruction was irrelevant, would be disregarded by the jury, and, therefore, could not have materially affected Kokitka’s substantial rights.
In this case, the only material facts that were possibly left out of the experts’ opinions, according to both Kokitka and Ford, concerned Kokitka’s preexisting extensive history of back, shoulder and neck pain. To trigger the application of the erroneous instruction, the jury, therefore, necessarily would have had to find that Kokitka had a history of back injury symptoms prior to her industrial injury. Otherwise, the jury instruction would not have, applied.
Kokitka’s expert, Dr. Miller, confirmed that his opinion hinged on a full medical history. He agreed that “in order * * * to rule out the prior history as being the cause of the problem which popped up on May 23, 1988, * * * you would have to know the medical details of * * * [w]hat part of the body it was, how severe it was, how long it lasted.” He acknowledged that it was impossible for him to determine what caused the injury without' “sharp, detailed knowledge of what that prior history was.” The other expert for Kokitka, Dr. Horwood, after being presented with a more complete medical history on cross-examination, concluded that Kokitka’s strain of her spine and left rotator cuff were “all exacerbations of prior conditions.”
The difference between the jury instruction as given and a proper jury instruction is that the erroneous instruction directed the jury to disregard the experts’ opinion if the jury found the facts to be materially different from the facts underlying the hypothetical question. A proper instruction would have directed the jury to decide what weight, if any, to give such an opinion, given the materially different factual basis for the opinion. If the jury believed Kokitka had a history of back problems prior to her accident, then what was the value of an opinion which did not consider such a history? In a case of this nature, the *94doctor’s opinion based on an incomplete or inaccurate medical history is pointless. The purpose of such an opinion is to evaluate causation through timing of symptoms together with past medical history. Considering the circumstances of this case, we find the value of the expert doctors’ .opinions is not sufficient to find prejudicial error in instructing the jury to disregard the opinions rather than weigh them.
Moreover, the jury, by special interrogatories, found that while an accident occurred on May 23, 1988, such accident did not “directly and proximately” cause any of Kokitka’s back problems. The erroneous jury instruction did not mandate such a conclusion by the jury. As this separate finding of the jury is not controlled by the erroneous jury instruction, that jury finding also supports our holding that the instruction was harmless.
As the erroneous jury instruction did not affect Kokitka’s substantial rights, we reverse the judgment of the court of appeals in case No. 93-2084 and reinstate the jury verdict.
Case No. 93-1887
The issue before this court in case No. 93-1887 is whether there are genuine ' issues of fact to support the Kokitkas’ claim that Ford acted in bad faith in the course of administering and resisting Kokitka’s workers’ compensation claims. For the following reasons, we agree with the court of appeals that summary judgment was properly granted in favor of Ford on all of the Kokitkas’ allegations of bad faith except for the allegation of failure to pay medical bills under R.C. 4123.515. Accordingly, we affirm the judgment of the court of appeals.
In Balyint v. Arkansas Best Freight Sys., Inc. (1985), 18 Ohio St.3d 126, 18 OBR 188, 480 N.E.2d 417, this court held that “[a]n employee of a self-insured employer may maintain a cause of action against the employer for the intentional and wrongful termination of workers’ compensation payments.” Id. at syllabus. This common-law cause of action for intentional tort requires proof that the employer intentionally failed to follow the law or violated a legal duty imposed upon it in the handling of its employee’s claim. See id.; see, also, Hall v. Marion Power Shovel, Inc. (1992), 78 Ohio App.3d 23, 28-29, 603 N.E.2d 427, 431. In Balyint, we found the employee alleged sufficient facts to overcome a motion to dismiss, where the complaint stated that the self-insuring employer paid the employee benefits for two and a half months and then without cause terminated the employee’s workers’ compensation payments.
• In the present case, the Kokitkas allege that Ford acted in bad faith during the administrative process because former R.C. 4123.515 (since repealed) required Ford to pay compensation and medical benefits as directed by the regional board *95of review. The merit of each of the Kokitkas’ allegations of bad faith will be discussed separately below.
Initially, the Kokitkas argue that Ford acted in bad faith in failing to continue to pay temporary total compensation for a period beyond that ordered by the board. Affirming the district hearing officer’s order, the board ordered temporary total disability for a “closed period” ending December 5, 1988, when Charlotte Kokitka returned to work. Temporary total disability benefits may be terminated when a claimant returns to work. State ex rel. Ramirez v. Indus. Comm. (1982), 69 Ohio St.2d 630, 632, 23 O.O.3d 518, 519, 433 N.E.2d 586, 588. The record reflects that Ford fully paid Kokitka for the “closed period.” No obligation to pay Kokitka for a second, separate period of temporary total disability ever arose, as no order to make such payments was ever made. Thus, unlike Balyint, the actions of the employer in the present case were permitted by law and therefore do not rise to the level of bad faith. Accordingly, summary judgment was properly granted on this issue.
The Kokitkas next argue that Ford acted in bad faith in deciding to contest Charlotte’s request for acromioplasty surgery to correct a tom rotator cuff. However, this request to voluntarily authorize surgery was not made until January 15, 1990 and, thus, was not the subject of the order affirmed by the board, which was dated December 6, 1989. Furthermore, Ford’s local workers’ compensation supervisor, Michael Reidy, testified that he asked for a hearing on this request in part because the chief occupational physician at Ford, Dr. Jose Chalela, determined that such surgery was not required for the allowed condition — the “left shoulder soft tissue strain.” Therefore, we find that Ford clearly did not act in bad faith in declining to voluntarily approve this request and in exercising its legal right to contest the request for surgery.
The Kokitkas next allege that Ford acted in bad faith in requesting a hearing on the Request for Change of Physician from Dr. Miller to Dr. Horwood, made on February 18, 1990. However, Reidy testified that Ford’s records showed that Dr. Kubin had treated Kokitka and that both Drs. Miller and Horwood were treating her. Ford requested a hearing to resolve the matter because, under Ohio Adm.Code 4121-17-05, Ford was not required to pay for “treatment by more than one physician for the same condition over the same period of time.” A hearing was requested to determine who was treating Kokitka at what times and because of the fact that the Request for Change of Physician had been sought in conjunction with the request for surgery. Therefore, we find that Ford was legally justified in requesting a hearing on the Request for Change of Physician and, therefore, its actions clearly did not amount to bad faith.
Ford alleges on cross-appeal that the trial court properly granted summary judgment to Ford on the Kokitkas’ claim that Ford wrongfully withheld payment *96of medical bills after the board had allowed the claim. The court of appeals reversed the trial court’s granting of summary judgment on this issue on the ground that former R.C. 4123.515 imposed on Ford the obligation to pay Kokitka’s medical bills. We agree with the court of appeals.
Former R.C. 4123.515 stated:
“In all other cases, if the decision of the district hearing officer is appealed by the employer * * *, the bureau of workers’ compensation shall withhold compensation and benefits during the course of the appeal to the regional board of review, but where the regional board rules in favor of the claimant, compensation and benefits shall be paid by the * * * self-insuring employer whether or not further appeal is taken.”
Pursuant to former R.C. 4123.515, Ford was obligated to pay those medical bills which were the subject of the district hearing officer’s decision. Thus, we conclude that there are genuine issues of fact as to whether Ford wrongfully withheld such payments.
Accordingly, the court of appeals’ judgment in case No. 93-1887 is affirmed in all respects.
Judgment reversed in case No. 93-2084-
Moyer, C.J., Wright, Pfeifer and Cook, JJ., concur.
Douglas, Resnick and F.E. Sweeney, JJ., dissent.
Judgment affirmed in case No. 93-1887.
Douglas, Resnick, F.E. Sweeney and Pfeifer, JJ., concur.
Moyer, C.J., Wright and Cook, JJ., dissent.