Chemicals, such as lye or acid, can cause corrosion upon contact with a person's skin. As a professional coding specialist, you may need to code the diagnosis of a burn or corrosion. A chemical burn occurs when living tissue is exposed to a corrosive substance such as a strong acid or base. Chemical burns follow standard burn classification and may cause extensive tissue damage. Burns from a heat source are classified by depth (first, second, third, unspecified), extent, and agent. For multiple burns, sequence the highest degree burn first. Multiple burns of the same three-character category are coded to the highest degree. Non-healing burns are coded as acute burns. The extent of injury is best described using the percentage of the total body surface area (%TBSA) that is affected by a burn. The measurement of burn surface area is important during the initial management of people with burns for estimating fluid requirements and determining need for transfer to a burns service T...
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