What is another example of a unique identifier used on a specimen label?

A bar code that documents lab reports serves as a unique identifier on a specimen label because it is specifically designed to ensure accurate tracking and identification of specimens throughout the laboratory process. Bar codes can provide consistent and precise data entry, minimizing the risks of human error and enhancing the efficiency of specimen handling. They allow for automated systems to quickly scan and retrieve information about the specimen, such as the patient identity, test orders, and handling instructions, ensuring that the right samples are processed and results are associated correctly with the patient.

In contrast, the other options do not provide the same level of specificity or reliability as a unique identifier. While a patient address could be part of identifying information, it is not unique on its own, as multiple patients could share the same address. Similarly, the sample type and collection method describe important attributes of the specimen but do not uniquely identify it. Therefore, a bar code is the most effective choice for ensuring that each specimen is distinctly recognized and correctly managed throughout its lifecycle in the laboratory.