Respiratory Question for the Week of May 13, 2019

Respiratory Compliance Question of the Week


What are the indications for plethysmography and use of code 94726?


The indications for plethysmography include:

  • Diagnosis of restrictive lung disease
  • Measurement of lung volumes to distinguish between restrictive and obstructive processes
  • Evaluation of obstructive lung diseases, such as bullous emphysema and cystic fibrosis
  • Measurement of lung volumes when multiple repeated trials are required or when the subject is unable to perform multibreath tests
  • Evaluation of resistance to airflow
  • Determination of the response to bronchodilators
  • Determination of bronchial hyperreactivity in response to methacholine, histamine, or isocapnic hyperventilation
  • Following the course of disease and response to treatment

This question was answered in our Coding Essentials for RT/Pulmonary Function. For more hot topics relating to respiratory therapy services, please visit our store or call us at 1.800.252.1578, ext. 2.