AMA CPT® Assistant - 1999 Issue 3 (March)

Medicine, Other Vascular Studies, 93720 (Q&A) (March 1999)

March 1999 page 10a Coding Consultation Medicine, Other Vascular Studies, 93720 (Q&A) Question What is total body plethysmography (code 93720)? AMA Comment Code 93720 describes a diagnostic pulmonary evaluation that measures thoracic gas volume, compliance of the lung, airway resistance and airway conductance. An example of a typical patient is as follows: A 65-year-old man has severe dyspnea with minimal exertion and bullous emphysema on chest x-ray. He is evaluated for possible resection of large bullae that are causing hyperinflation of the chest and compression of functioning lung. Total body plethysmography is performed, along with a gas dilution...

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