To code the burns on the upper thigh, consult the coding guidelines and use the correct code for second-degree burns of the trunk/limb.
To code the burns on the upper thigh, we need to determine the degree of the burns. According to the information provided, the burns are described as first- and second-degree burns. A first-degree burn affects only the epidermis, while a second-degree burn affects both the epidermis and a portion of the dermis. Since the burns involve both the epidermis and dermis, we would code them as second-degree burns.
When coding burns, it's important to follow the appropriate code for the site of the burn. The upper thigh falls into the category of trunk/limb, which has its specific codes. You would need to consult the coding guidelines and use the correct code for second-degree burns of the trunk/limb.