Upon its own motion or upon the application of any party of interest, the Commission may end, diminish, or increase the compensation awarded by an administrative law judge in the Commission's final award. Shaw v. Scott, 49 S.W.3d 720 (Mo.App. 2001); Champ v. Doe Run Company, 84 S.W.3d 493 (Mo.App. 2002).
The ultimate determination of credibility of witnesses rests with the Commission; however, the Commission should
take into consideration the credibility determinations made by an administrative law judge. When reviewing an award entered by the administrative law judge, the Commission is not bound to yield to his or her findings including those relating to credibility, and is authorized to reach its own conclusions. An administrative law judge is no more qualified than the Commission to weigh expert credibility from a transcript or deposition. Kent v. Goodyear Tire \& Rubber Co., 147 S.W.3d 865 (Mo.App. 2004).
It is the employee's burden to prove the nature and extent of his disability to a reasonable certainty. Davis v. Brezner, 380 S.W.2d 523 (Mo.App. 1964); Matzker v. St. Joseph Minerals, 740 S.W.2d 362 (Mo.App. 1987). The determination of a specific amount or percentage of disability to be awarded an injured employee is a finding of fact within the unique province of the Commission. Landers v. Chrysler, 963 S.W.2d 275 (Mo.App. 1998). In making this determination, the Commission can consider all of the evidence in the record and draw all reasonable inferences from that evidence. Id. The Commission is not bound by the percentage estimates of the medical experts and is free to assess a disability either higher or lower of that expressed in the medical or vocational testimony. Id.
After reviewing the entire record the Commission finds the amount of compensation awarded by the administrative law judge, i.e., permanent total disability solely attributable to the accident occurring June 19, 1998, was excessive, and not supported by the competent and substantial evidence. The Commission modifies the award as follows: 8\% permanent partial disability of the body as a whole referable to the lumbar spine solely attributable to the accident occurring June 19, 1998; and, future medical care and treatment as follows: TENS unit and medical care and treatment in the form of anti-inflammatories deemed reasonable and necessary to cure and relieve employee from the effects of the injury sustained. Consequently the amount of compensation payable for residual permanent partial disability attributable to the accident occurring June 19, 1998, is 32 weeks of permanent partial disability or a lump sum amount of $\ 8,909.44 ( 32 weeks $x \ 278.42 ).
In reaching this conclusion and modification of the administrative law judge's award, the Commission has principally relied on the treating medical records offered in evidence, and the medical reports and medical opinions of Dr. Lennard. The Commission determines that these medical records and medical opinions are the most credible, persuasive and trustworthy.
A close review of the treating medical records as well as the medical opinions rendered by Dr. Lennard, convinces the Commission the employee sustained an injury principally to the sacral area on account of the accident occurring June 19, 1998, which resulted solely in permanent partial disability, and not permanent total disability. Reasonable and adequate medical care and treatment was rendered employee through October 29, 1999, and at that point it is clear employee had achieved maximum medical improvement, was released and discharged from treatment by Dr. Lennard, and a final rating report was rendered. The final diagnosis was lumbosacral strain.
Employee worked for almost one year prior to seeking any additional medical care and treatment, and although employee was not a good historian as to actual dates, it is clear that employee sustained two additional injuries due to work related accidents, i.e., lifting heavy parts at work on at least two separate occasions, resulting in a worsening of symptoms and changes in condition or pathology, and were distinguishable subsequent intervening events.
Dr. Lennard is the only expert who rendered opinions concerning these separate events, and apportioned any possible disability attributable to these subsequent injuries. Both of the two separate, distinguishable lifting accidents at work, resulted in additional medical treatment, additional lost time, and worsening of symptoms. Employee was unable to return to work after the second lifting injury which apparently occurred in approximately 2002, four years after the accident of June 19, 1998. The medical chronology demonstrates a clear time gap among each of employee's injuries, the worsening of his symptoms, and the need for additional treatment. Employee's evidence in support of his contention that he is permanently and totally disabled on account of the accident occurring June 19, 1998, is actually based upon a consideration of all three injuries in combination, with total disregard to the subsequent incidents.
Dr. Crockett had no information concerning any additional incidents subsequent to June 19, 1998, and since the Commission does find there were two subsequent intervening accidents, which constituted separable compensable injuries, his medical opinion that employee's permanent total disability is attributable solely to the
accident occurring June 19, 1998, cannot legally be afforded any weight or credibility. Employee is required to provide expert medical testimony apportioning the permanent disability attributable to each of the separate injuries. Plaster v. Dayco Corporation, 760 S.W.2d 911 (Mo.App. 1988); and Goleman v. MCI Transporters, 844 S.W.2d 463 (Mo.App. 1992).
Mr. Eldred rendered an opinion that employee was not able to compete in the open labor market, however, since the opinion of Mr. Eldred was rendered in 2006, it necessarily and admittedly included employee's total condition at that point, i.e., the two subsequent accidents, thus, rendering his vocational opinion unreliable as to determining employee's ability to work or not work solely attributable to the accident occurring June 19, 1998.
In contrast, the medical opinions rendered by Dr. Lennard dated November 29, 1999, March 5, 2004, and July 16, 2004, are reliable, trustworthy and credible. In fact, Dr. Lennard actually treated employee for the accident occurring June 19, 1998, and was in the best position to render credible medical opinions as to the nature and extent of permanent disability and future medical care and treatment, solely attributable to the accident occurring June 19, 1998. The Commission determines that the medical records and medical opinions of Dr. Lennard are by far the most credible, persuasive and trustworthy to determine the issues in dispute on account of the accident occurring June 19, 1998.
In summary, Dr. Lennard was of the opinion that employee had reached maximum medical improvement as of November 29, 1999, on account of the accidental injury occurring June 19, 1998; that he sustained 8\% permanent partial disability of the body as a whole referable to the lumbar spine; and he initially imposed restrictions of avoidance of prolonged bending and allowing him to occasionally lift up to 40 pounds, which he subsequently modified to 10 pounds. The Commission finds these opinions extremely reliable since employee had achieved maximum medical improvement on account of the 1998 accident, and obviously this opinion was rendered prior to his subsequent injuries at work.
Dr. Lennard issued two subsequent reports ultimately apportioning his permanent disability as follows: 20\% permanent partial disability of the body as a whole referable to the lumbar spine; apportioning 8\% permanent partial disability of the body as a whole referable to the lumbar spine on account of the accident occurring June 19, 1998, 2\% attributable to employee's subsequent injury sustained approximately October 2000, and the remainder of the rating due to employee's pre-existing condition. Dr. Lennard did not believe that there was any permanent disability attributable to the second lifting incident at work which occurred in approximately 2002.
The Commission also adopts the opinions of Dr. Lennard as to future medical care and treatment, i.e., that employee needs a TENS unit and employee will need anti-inflammatories to cure and relieve him from the effects of the injury occurring June 19, 1998.