CPT® Code 95923

Testing of autonomic nervous system function; sudomotor, including 1 or more of the following: quantitative sudomotor axon reflex test (QSART), silastic sweat imprint, thermoregulatory sweat test, and changes in sympathetic skin potential

Testing of autonomic nervous system function, specifically sudomotor function, is a diagnostic procedure aimed at evaluating the small nerve fibers that are associated with sweat glands. This type of testing is crucial for understanding how well the autonomic nervous system is functioning, particularly in relation to sweat production. The procedure encompasses various methodologies, allowing the physician to select one or more tests based on the patient's specific needs and clinical indications. Among the available tests are the quantitative sudomotor axon reflex test (QSART), silastic sweat imprint, thermoregulatory sweat test, and assessments of changes in sympathetic skin potential. Each of these tests provides valuable insights into the autonomic nervous system's control over sweat glands, which can be affected by a range of conditions. The QSART involves measuring baseline skin temperature and sweat output, followed by stimulation of sweat production through electrical means. The silastic sweat imprint captures the sweat droplets on a silastic material, while the thermoregulatory sweat test utilizes an indicator powder to visually demonstrate sweat production under heat exposure. Additionally, changes in sympathetic skin potential are evaluated through electrical stimulation, allowing for a comprehensive assessment of autonomic nerve function. The results from these tests are meticulously analyzed, and a detailed report is generated by the physician to aid in diagnosis and treatment planning.