CPT® Code 83605

The CPT® Code 83605 refers to the laboratory test for measuring lactate, also known as lactic acid, levels in blood or other body fluids. Lactic acid is a byproduct of anaerobic metabolism, primarily produced by muscle tissues and red blood cells during periods of low oxygen availability. This test is crucial for assessing metabolic conditions, as elevated lactate levels can indicate various physiological stresses on the body. Conditions that may lead to increased lactate production include strenuous physical exercise, heart failure, severe infections such as sepsis, and different shock states, including cardiogenic and hypovolemic shock. Additionally, liver disease can also contribute to elevated lactate levels. The test typically requires a blood sample, which is obtained through a procedure known as venipuncture. In some cases, cerebrospinal fluid (CSF) may be collected via lumbar puncture, commonly referred to as a spinal tap, to measure lactate levels in that fluid. Other body fluids may also be collected for testing. The analysis of plasma, CSF, and other body fluids is performed using enzymatic methodology, which provides accurate measurements of lactate concentrations.