CPT® Code 93721

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Total body plethysmography is a diagnostic procedure that involves the use of a specialized chamber designed to measure changes in the volume of the body. This technique is primarily utilized to assess respiratory function by evaluating how the lungs expand and contract during breathing. The procedure captures the variations in air volume within the lungs, providing valuable insights into pulmonary health. Additionally, total body plethysmography can also be employed to study other physiological parameters, such as blood pressure, by analyzing the body's overall volume changes in response to various stimuli. The CPT® code 93721 specifically refers to the tracing aspect of this procedure, indicating that it involves the collection of data without the need for interpretation or a formal report. This means that the focus is solely on obtaining the measurements rather than analyzing or summarizing the results for clinical decision-making.