When you have to prove your injuries before a judge, or pursue an extent of injury dispute, in a Texas workers' compensation claim, you have to have medical evidence of the cause of your injury. In the Texas system, this is generally called a letter of causation. It is simply a letter that a doctor writes for you to put into evidence instead of providing testimony. This letter has to address the mechanism of your injury, how the diagnosis was made, what forces were involved in the injury event, and how those forces acted upon your body to cause the injuries that you have. This video provides an example and further discussion of this type of evidence.
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