Final answer:
Lab test codes are located in the Pathology and Laboratory section, where pathologists analyze tissue and blood samples to diagnose diseases.
Step-by-step explanation:
The codes related to laboratory tests performed would be found in the Pathology and Laboratory section. A pathologist is a medical professional who specializes in the detection of disease in humans and animals by examining body tissue and blood samples. These experts work in clinical laboratories to determine the presence of diseases or infections and can also perform autopsies to uncover causes of death.