OPINION
1 1 Appellant McKesson Industries Corporation (McKesson) appeals from an order of the Utah Labor Commission (Commission) awarding Robert Lieberman workers' compensation benefits. We affirm.
BACKGROUND
T2 In 1995, while working in a warehouse owned and operated by McKesson, Lieberman was struck in the head by a fourteen pound case that fell six or seven feet. The impact caused Lieberman to suffer two herniated cervical disks. In an attempt to repair the damage from the accident, Licber-man subsequently underwent a variety of surgical procedures, including both the installation of a plate, and disk fusion.
3 During a scheduled follow-up visit, Lieberman's doctor noted that
Rob is now three and one-half months post-op ACD, allograft interbody fusion and plate fixation C5-6-7. He is working, but the company has basically put him back to regular duty with repetitive overhead reaching and lifting, contrary to my restrictions which said no overhead repetitious lifting. In the past several days this has aggravated his neck pain.
T 4 In September 1996, Lieberman entered into an agreement with McKesson through which McKesson agreed to pay Licberman $13,965.35 in temporary total disability, $10,707.84 in total permanent partial disability for a 12% whole person impairment, and $10,392.04 for Lieberman's medical expenses. However, on April 21, 1997, McKesson's doctor noted that Licberman still suffered "neck pain and stiffness when he has to look upward or when using his arms and hands above his head."
5 In July 1997, Lieberman petitioned the Commission for a hearing seeking payment of additional medical expenses and further disability compensation. The Commission granted the petition, and, following a hearing on the petition, an Administrative Law Judge (ALJ) found that Lieberman did suffer from ongoing symptoms resulting from the accident and ordered McKesson to pay Licber-man an additional $4,550.96 as compensation for his temporary total disability.
16 By February 1999, Lieberman's doctor suspected that the attempt to fuse the disks had failed, but opined that Lieberman's chronic pain was likely the result of soft-tissue fatigue caused by his new job.
T7 On May 22, 1999, while pulling himself into his pickup truck, Lieberman hit his head on the truck's door frame aggravating his neck injury. Lieberman was subsequently reexamined by Dr. Hood, who determined that Lieberman had exacerbated his earlier injury and recommended additional surgery. McKesson denied responsibility for any costs *471 associated with the aggravation to Lieberman's neck injury.
T8 Lieberman petitioned the Commission for another hearing, seeking an order requiring McKesson to pay medical expenses resulting from treatment of the subsequent injury, other necessary medical care, and additional temporary total disability compensation. Following a hearing, the ALJ determined that "the incident of May 22, 1999 failed to constitute an event that would relieve McKesson of liability for Mr. Licber-man's current disability and medical needs."
19 The ALJ ordered McKesson to pay Lieberman's medical costs, and awarded Lieberman temporary total disability compensation. McKesson sought review of the ALJ's decision through the Labor Commission's Appeals Board. However, after reviewing McKesson's claims, the Board affirmed the ALJ's order. McKesson now appeals.
ISSUES AND STANDARDS OF REVIEW
T10 McKesson argues that the Commission relied upon an incorrect legal standard in determining Lieberman's eligibility for additional workers' compensation benefits. This argument presents a question of law, which we review for correctness. See Esquivel v. Labor Comm'n,
111 McKesson also argues that the Commission erred in concluding that Lieberman's September 25, 1995 accident was the cause of his May 22, 1999 injuries. "[The Legislature has granted the Commission discretion to determine the facts and apply the law to the facts in all cases coming before it. As such, we must uphold the Commission's determination ... unless the determination exceeds the bounds of reasonableness and rationality...." AE Clevite, Inc. v. Labor Comm'n,
facts and apply the law in this chapter or any other title or chapter it administers."). Further, we resolve all doubts regarding an employee's right to compensation in favor of the employee. See AF Clevite,
ANALYSIS
1 12 McKesson first argues that the Commission failed to apply the causation analysis mandated by Allen v. Industrial Commission,
113 When an individual experiences a subsequent aggravation to an injury that arose "out of and in the course of employment," Utah Code Ann. § 34A-2-401 (1997), the question of additional compensation will hinge on whether the " 'subsequent injury is ... a natural result of [the accident underlying the] compensable primary injury"" Intermountain Health Care v. Board of Rev.,
114 McKesson argues that Allen supersedes the standard articulated above, however, McKesson misconstrues both the holding of Allen and the thrust of Intermountain.
115 In Allen, the Utah Supreme Court set out to clarify the requirements of Utah's workers' compensation law. See Allen,
116 Once the claimant has established that his injuries arose from an accident, and that "a sufficient causal connection [exists] between [his] disability and the working conditions," id. at 25, the claimant has met the Allen requirements, and thus must be compensated for his workplace injuries. Moreover, once the injury is determined to be a compensable injury, the employer is responsible for "all medical{ costs] resulting from that injury." McKean,
117 Here, there is no dispute concerning the compensability of Lieberman's workplace injury, rather, the dispute centers on his subsequent aggravation of the compensable workplace injury. When a claimant suffers a subsequent aggravation to a compensable workplace injury, the question of whether the subsequent injury is compensable turns upon the standard articulated in Intermountain. See Intermountain,
118 To qualify for additional benefits after suffering a subsequent aggravation to a compensable workplace injury, a claimant need only prove that his "subsequent injury ... [is] a natural result of [his] compensable primary injury."
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Id. Furthermore, a claimant need not " 'show that his original tragedy was the sole cause of [his] subsequent injury?" Id. at 845 (quoting McKean,
119 McKesson asserts, however, that Allen demands the application of a substantively different standard to determine whether a claimant is eligible for additional workers' compensation benefits to cover the costs of a subsequent aggravation to a compensable workplace injury. McKesson argues that Lieberman's compensable primary injury created a preexisting condition, and, as stated by the supreme court, "where the claimant suffers from a preexisting condition which contributes to the injury, an unusual or extraordinary exertion is required to prove legal causation." Allen,
120 In Allen, a claimant who suffered from - non-compensable preexisting back problems was denied workers' compensation benefits for injuries to his back that he claimed resulted from a workplace accident. See id. at 17. On appeal, the supreme court reversed the Commission's decision, stating that "emphasis on prior injuries is not determinative of whether an accident occurred." Id. at 27. Rather, the court continued, preexisting conditions are more appropriately analyzed for their impact on the question of legal causation. See id. at 27-28. To meet the legal causation requirement, a claimant with a preexisting condition implicated in the claim must demonstrate that his workplace efforts "exceeded the exertion that the average person undertakes in nonem-ployment life." Id.
121 However, whether or not a claimant suffers from a preexisting condition, once benefits are properly awarded, the employer is responsible for "all medical{ costs] resulting from [the compensable] injury," including costs resulting from subsequent aggravations to the compensable workplace injury.
3
McKean,
*473 122 We conclude that it would be inappropriate to examine subsequent aggravations of compensable work-related injuries by applying the same exacting standard that we apply when determining the compensability of primary workplace injuries involving preexisting conditions.
123 Accordingly, if the claimant sue-cessfully establishes that the subsequent injury is the "natural result" or consequence of a compensable workplace injury, the claimant is eligible for additional workers' compensation benefits. McKean,
124 In the instant case, the Commission accepted as undisputed the fact that Lieberman had suffered a compensable workplace injury to the vertebra of his neck in 1995. The Commission then analyzed "the facts surrounding [Lieberman's] subsequent injury and ... the connection between the subsequent injury and the original compensa-ble industrial injury," Intermountain,
125 McKesson next argues that the Commission erred in concluding that Lieberman's compensable workplace injury was the cause of his subsequent aggravating injury. This court will not overturn the Commission's factual findings "unless they are arbitrary and capricious, or wholly without cause, or contrary to the one [inevitable] conclusion from the evidence." Large v. Industrial Comm'n,
126 Here, the Commission accepted as undisputed the existence of Lieberman's compensable workplace injury The Commission then determined that the available medical evidence pointed to Lieberman's compensable workplace injury as the medical cause of his subsequent aggravating injury.
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Finally, after examining the facts surrounding Lieberman's subsequent injury, as well as "the connection between [his] subsequent injury and [his] original compensable industrial injury," Intermountain,
127 We have reviewed the record and conclude that the evidence supports the Commission's findings. Licberman clearly suffered a grave compensable workplace injury to his neck in 1995. Additionally, medical expert opinion proffered by both sides suggested that Lieberman's injury never properly healed, and that a subsequent aggravation of that injury was not unexpected. Finally, nothing in the record suggests that Lieberman's subsequent injury resulted from unreasonable conduct; therefore, we cannot say that the Commission's findings were "wholly without cause, or contrary to the one [inevitable] conclusion from the evidence." Large,
1 28 We also conclude that the Commission had an adequate factual basis upon which to determine that Licberman's subsequent re-injury was the "natural result" of his com-pensable workplace injury. Therefore, the Commission properly determined - that McKesson was responsible for the costs associated with the re-injury.
*474
CONCLUSION
129 The Commission properly examined Lieberman's petition for additional workers' compensation benefits under the standard set forth in Intermountain Health Care v. Board of Review,
130 Accordingly, we affirm the Commission's findings and conclusions.
{31 WE CONCUR: NORMAN H. JACKSON, Presiding Judge, and JAMES Z. DAVIS, Judge.
*475 STATE v. KOONTZ
Wash. 475
Cite as
Notes
. In most cases, "a usual or ordinary" exertion is sufficient to meet the legal causation requirement; however, "a claimant with a preexisting condition must show that the employment contributed something substantial to increase the risk he already faced in everyday life because of his condition." - Allen v. Industrial Comm'n,
. - Stated more precisely, the claimant must establish that the subsequent aggravation is causally linked to the primary compensable injury. See Intermountain Health Care v. Board of Rev.,
. Of course, responsibility for costs resulting from subsequent aggravations to compensable workplace injuries is not automatic. The claimant must first demonstrate that the subsequent aggravation is the "natural result" of the primary workplace injury or accident. Mountain States Casing Servs. v. McKean,
. The Commission adopted the findings of the ALJ.
