The parties tried the employee's 2015 SIF claim on March 29, 2021, less than a month before the Supreme Court handed down its April 20, 2021, decision in Treasurer v. Parker, 622 S.W. 3d 178 (Mo. banc 2021). Parker was highly anticipated because it involved issues involving the application of $\S 287.220 .3(2)(a)$ to claims like the employee's herein. Recognizing the uncertain legal terrain involving statutory interpretation of $\S 287.220 .3$, the employee's attorney solicited Dr. Volarich's opinion regarding multiple scenarios relating to medical causation of employee's PTD. Dr. Volarich amended his original September 18, 2018, IME several times to address employee's attorney's additional questions in anticipation of the Supreme Court's Parker ruling. Dr. Volarich gave his last opinion at his November 6, 2020, deposition.
The ALJ found:
At the time of his deposition on November 6, 2020, Dr. Volarich testified that Employee was permanently and totally disabled as a result of her January 23, 2015 work-related injury in combination with her pre-existing disabilities. As a further clarification, he testified that Employee was also permanently and totally disabled as a result of her January 23, 2015 workrelated injury in combination with just her pre-existing lumbar spine and pancreatitis. Finally, Dr. Volarich opined that the pre-existing disability relating to her pancreatitis and lumbar spine directly and significantly aggravated or accelerated the subsequent January 23, 2015 work-related injury. ${ }^{2}$
The SIF urges us to find that Dr. Volarich's amendments to his original opinion and responses designed to address different potential interpretations of 287.220 .3 are evidence that he lacked credibility. The employee responded to these arguments by noting that the SIF failed to provide any expert opinions to counter Dr. Volarich or vocational expert Delores Gonzales and that its appeal hinges on ignoring evidence contrary to the SIF's position and the ALJ's credibility findings and award. In this case, we agree with the employee's position. We further find that a medical expert's alternate opinions on the issue of medical causation in response to an attorney's questions based on assumptions relating to various potential legal interpretations of $\S 287.220 .3$ does not, in and of itself, demonstrate a lack of trustworthiness or credibility.
SIF's Entitlement to Credit for Monies Employer/insurer Paid to Employee for PPD Section 287.220.2 RSMo provides that the liability of the SIF only commences "after the completion of payment of the compensation by the employer." An award of PTD against the SIF first requires a determination of PPD attributable to the primary injury. See Landman v. Ice Cream Specialties, Inc., 107 S.W.3d 240,248 (Mo. 2003). The January 1, 2014, amendments enacting § 287.220 .3 did not amend or repeal this provision of $\S 287.220 .2$. We therefore concur with the SIF's assertion that, if found liable for PTD, the SIF is entitled to a credit for amounts employer has paid to employee for disability related to the primary injury.
In this case, the ALJ found that employee suffered 30\% PPD of the body as a whole referable to the neck ( 120 weeks) and 40 % PPD of the left upper extremity at the 232week level ( 92.8 weeks) as a result of her January 23, 2015, primary injury. ${ }^{3}$ After finding, as the parties stipulated, that the employee reached MMI on June 27, 2017, he found the SIF liable for weekly PTD benefits starting June 28, 2017.
We conclude that the ALJ erred in not allowing the SIF a credit against its PTD obligation for PPD paid by employer/insurer related to employee's primary injury.
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[^0]: ${ }^{2} Award, p. 8.
{ }^{3}$ Id., pp. 8-9.