The individual tests are usually sensitive enough to determine that there is something that is affecting a person’s health, but they are not often strong enough to provide a specific diagnosis. This combined blood test is often ordered as part of a comprehensive yearly exam. When Will a Doctor Order the CBC and CMP? The CMP specifically may be ordered to track a known condition, such as hypertension, or to monitor liver or kidney disease treatments. These tests are able to evaluate organ function, present an overall glimpse of systemic health, and check for kidney disease, diabetes, or liver disease. They are often used as a first-line test to determine if there is something wrong with a patient. The complete blood count and comprehensive metabolic panel are used as broad screening tools to determine the health of an individual.