BILLINGS, Presiding Judge:
John W. Zupon filed this Petition for Review from an order of the Industrial Commission denying his claim for permanent total disability benefits. We affirm.
BACKGROUND
In 1975, petitioner was employed by Kaiser Steel as an electrician. On August 7 of that year, he felt a pain in his back while lifting an acetylene tank at work. In February of 1977, an administrative law judge found petitioner had a ten percent permanent physical impairment and was entitled to twenty-six weeks of temporary total compensation and thirty-one weeks of permanent partial compensation. The AU based his ruling on the opinion of a medical panel which found petitioner had total physical impairment of sixty percent. The panel, however, found only ten percent of the total physical impairment attributable to the industrial accident. It attributed the balance of petitioner’s impairment to a preexisting condition known as ankylosing-spondylitis, a degenerative disease of the spine. The panel concluded the ten percent impairment was attributable to the industrial accident because there was “a one-in-six chance that the ankylosingspondylitis was aggravated by the lumbar back strain on the basis of the progression of the x-ray changes.”
In June of 1976, petitioner applied for social security disability benefits. His initial application, application for a rehearing,
and application on appeal were all denied. Following a court order obtained to acquire review of unspecified new evidence, petitioner had a new hearing in May of 1978. In June of 1978, the Social Security Administration’s AU granted petitioner benefits. The AU ruled petitioner’s total disability was not a result of his back problems but rather a result of arthritis in his hands that became more severe starting in January of 1977. A doctor who assessed petitioner in 1981 to determine whether his Social Security benefits should continue noted: “I think this patient’s symptoms are way out of proportion to the objective findings which are presented.”
On May 24, 1991, petitioner filed an application for permanent total disability based on his 1975 accident. A hearing was held and the AU concluded petitioner had failed to establish the necessary medical causation between his 1975 industrial accident and his permanent total disability. The AU based her conclusion on two rationales: First, the medical evidence demonstrated it was petitioner’s arthritic condition, which was unrelated to the industrial injury, that caused petitioner’s inability to work; Second, even if ankylosingspondyli-tis contributed to petitioner’s inability to work, the industrial accident did not cause the disease and “only questionably aggravated it.”
On August 3, 1992, the Industrial Commission issued an order affirming the AU’s order and denying petitioner’s motion for review. Petitioner brings a petition for review to this court from the Commission’s order.
On appeal, petitioner argues the Commission erred by failing to apply the “odd lot” doctrine to his situation and award him permanent total disability benefits.
Petitioner further claims the Commission’s determination of no medical causation was contrary to its prior determination of ten percent causation and therefore in error.
The Commission responds that
the odd lot doctrine is inapplicable because medical causation must be established prior to the doctrine’s application and the Commission properly found petitioner’s industrial injury did not cause his permanent total disability.
ODD LOT DOCTRINE
The odd lot doctrine “allows the Commission to find permanent total disability when a relatively small percentage of impairment caused by an industrial accident is combined with other factors to render the claimant unable to obtain , employment.”
Zimmerman v. Industrial Comm’n, 785
P.2d 1127, 1131 (Utah App.1989).
See also Marshall v. Industrial Comm’n,
681 P.2d 208, 212-13 (Utah 1984) (discussing odd lot doctrine). To qualify as a recipient of benefits under the odd lot doctrine, an employee must first “prove that he or she can no longer perform the duties required in his or her occupation.”
Zimmerman,
785 P.2d at 1131. Next, the employee, through cooperation with the Division of Vocational Rehabilitation, must “establish that he or she cannot be rehabilitated.”
Id.
After the employee has shown that rehabilitation is not possible, the employer has the opportunity “to prove the existence of steady work the employee can-perform.”
Id.
The work the employer establishes is available must take into consideration all relevant factors “including the employee’s education, mental capacity, and age” as well as physical limitations.
Id.
Before a claimant can acquire benefits under the odd lot doctrine, however, the claimant must establish a compensa-ble industrial injury.
Zimmerman,
785 P.2d at 1132. “ ‘[Ujnless the claimant has suffered a compensable industrial injury, the [odd lot] doctrine is inapplicable no matter how compelling the other factors.’ ”
Id.
(quoting
Ortiz v. Industrial Comm’n,
766 P.2d 1092,1094 (Utah App.1989)) (modifications in original). The claimant must prove the compensability of an injury by a preponderance of the evidence.
Ashcroft v. Industrial Comm’n,
855 P.2d 267, 269 (Utah App.1993). Proving medical causation between the industrial accident and the disability for which the claimant seeks compensation is a necessary component for recovery.
Allen v. Industrial Comm’n,
729 P.2d 15, 27 (Utah 1986).
MEDICAL CAUSATION
Medical causation is an issue of fact and we review the determination of the Industrial Commission under the substantial evidence standard.
See King v. Industrial Comm’n,
850 P.2d 1281, 1285 (Utah App.1993); Utah Code Ann. § 63-46b-16(4)(g) (1989). “Medical causation demands that petitioner ‘prove [his] disability is medically the result of an exertion or injury that occurred during a work-related activity.’ ”
Willardson v. Industrial Comm’n,
856 P.2d 371, 375 (Utah App.1993) (quoting
Allen v. Industrial Comm’n,
729 P.2d 15, 27 (Utah 1986)) (footnote omitted).
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BILLINGS, Presiding Judge:
John W. Zupon filed this Petition for Review from an order of the Industrial Commission denying his claim for permanent total disability benefits. We affirm.
BACKGROUND
In 1975, petitioner was employed by Kaiser Steel as an electrician. On August 7 of that year, he felt a pain in his back while lifting an acetylene tank at work. In February of 1977, an administrative law judge found petitioner had a ten percent permanent physical impairment and was entitled to twenty-six weeks of temporary total compensation and thirty-one weeks of permanent partial compensation. The AU based his ruling on the opinion of a medical panel which found petitioner had total physical impairment of sixty percent. The panel, however, found only ten percent of the total physical impairment attributable to the industrial accident. It attributed the balance of petitioner’s impairment to a preexisting condition known as ankylosing-spondylitis, a degenerative disease of the spine. The panel concluded the ten percent impairment was attributable to the industrial accident because there was “a one-in-six chance that the ankylosingspondylitis was aggravated by the lumbar back strain on the basis of the progression of the x-ray changes.”
In June of 1976, petitioner applied for social security disability benefits. His initial application, application for a rehearing,
and application on appeal were all denied. Following a court order obtained to acquire review of unspecified new evidence, petitioner had a new hearing in May of 1978. In June of 1978, the Social Security Administration’s AU granted petitioner benefits. The AU ruled petitioner’s total disability was not a result of his back problems but rather a result of arthritis in his hands that became more severe starting in January of 1977. A doctor who assessed petitioner in 1981 to determine whether his Social Security benefits should continue noted: “I think this patient’s symptoms are way out of proportion to the objective findings which are presented.”
On May 24, 1991, petitioner filed an application for permanent total disability based on his 1975 accident. A hearing was held and the AU concluded petitioner had failed to establish the necessary medical causation between his 1975 industrial accident and his permanent total disability. The AU based her conclusion on two rationales: First, the medical evidence demonstrated it was petitioner’s arthritic condition, which was unrelated to the industrial injury, that caused petitioner’s inability to work; Second, even if ankylosingspondyli-tis contributed to petitioner’s inability to work, the industrial accident did not cause the disease and “only questionably aggravated it.”
On August 3, 1992, the Industrial Commission issued an order affirming the AU’s order and denying petitioner’s motion for review. Petitioner brings a petition for review to this court from the Commission’s order.
On appeal, petitioner argues the Commission erred by failing to apply the “odd lot” doctrine to his situation and award him permanent total disability benefits.
Petitioner further claims the Commission’s determination of no medical causation was contrary to its prior determination of ten percent causation and therefore in error.
The Commission responds that
the odd lot doctrine is inapplicable because medical causation must be established prior to the doctrine’s application and the Commission properly found petitioner’s industrial injury did not cause his permanent total disability.
ODD LOT DOCTRINE
The odd lot doctrine “allows the Commission to find permanent total disability when a relatively small percentage of impairment caused by an industrial accident is combined with other factors to render the claimant unable to obtain , employment.”
Zimmerman v. Industrial Comm’n, 785
P.2d 1127, 1131 (Utah App.1989).
See also Marshall v. Industrial Comm’n,
681 P.2d 208, 212-13 (Utah 1984) (discussing odd lot doctrine). To qualify as a recipient of benefits under the odd lot doctrine, an employee must first “prove that he or she can no longer perform the duties required in his or her occupation.”
Zimmerman,
785 P.2d at 1131. Next, the employee, through cooperation with the Division of Vocational Rehabilitation, must “establish that he or she cannot be rehabilitated.”
Id.
After the employee has shown that rehabilitation is not possible, the employer has the opportunity “to prove the existence of steady work the employee can-perform.”
Id.
The work the employer establishes is available must take into consideration all relevant factors “including the employee’s education, mental capacity, and age” as well as physical limitations.
Id.
Before a claimant can acquire benefits under the odd lot doctrine, however, the claimant must establish a compensa-ble industrial injury.
Zimmerman,
785 P.2d at 1132. “ ‘[Ujnless the claimant has suffered a compensable industrial injury, the [odd lot] doctrine is inapplicable no matter how compelling the other factors.’ ”
Id.
(quoting
Ortiz v. Industrial Comm’n,
766 P.2d 1092,1094 (Utah App.1989)) (modifications in original). The claimant must prove the compensability of an injury by a preponderance of the evidence.
Ashcroft v. Industrial Comm’n,
855 P.2d 267, 269 (Utah App.1993). Proving medical causation between the industrial accident and the disability for which the claimant seeks compensation is a necessary component for recovery.
Allen v. Industrial Comm’n,
729 P.2d 15, 27 (Utah 1986).
MEDICAL CAUSATION
Medical causation is an issue of fact and we review the determination of the Industrial Commission under the substantial evidence standard.
See King v. Industrial Comm’n,
850 P.2d 1281, 1285 (Utah App.1993); Utah Code Ann. § 63-46b-16(4)(g) (1989). “Medical causation demands that petitioner ‘prove [his] disability is medically the result of an exertion or injury that occurred during a work-related activity.’ ”
Willardson v. Industrial Comm’n,
856 P.2d 371, 375 (Utah App.1993) (quoting
Allen v. Industrial Comm’n,
729 P.2d 15, 27 (Utah 1986)) (footnote omitted).
Petitioner claims the Commission committed error in ignoring its prior decision that ten percent of petitioner’s permanent partial impairment was attributable to the industrial accident. This argument misapprehends the impact of the Commission’s earlier decision.
For the odd-lot doctrine to apply, the Commission must first determine there is medical causation between the petitioner’s 1975 industrial accident and his now claimed
permanent total
disability. That is a different question from, and not controlled in any way by, the determination that his industrial accident caused a permanent
partial
disability. Furthermore, the determination that there was medical cau
sation in the 1977 hearing did not prevent the Commission from reaching a different conclusion based on new medical evidence at the 1992 hearing.
See
Utah Code Ann. § 35-1-78(1) (Supp.1993). While the 1977 decision was some evidence supporting medical causation for the new permanent total claim brought sixteen years after the industrial accident, the AU and the Commission properly reassessed
all
the medical evidence in the record.
Based primarily on the Social Security Administration’s determination that petitioner’s total disability was a result of the arthritis in the petitioner’s hands, the Commission found there was no medical causation between the 1975 industrial injury and his ' permanent total disability claim.
Thus, the Commission’s determination petitioner did not establish by a preponderance of the evidence that the 1975 industrial accident was a medical cause of his now claimed total permanent disability is supported by substantial, undisputed evidence in the record. We therefore affirm.
CONCLUSION
The Industrial Commission’s determination that petitioner failed to establish his 1977 industrial injury was a medical cause of his now claimed permanent total disability is supported by substantial evidence. We therefore affirm the denial of permanent total disability benefits.
ORME and BENCH, JJ., concur.