Results 350,341 (4.0%) of the 8.7 million ED visits had a diagnosis of asthma in 1 of the 11 Dx positions. The most common chief complaints for visits with asthma were: Dx positions 1 and 2-dyspnea and asthma, and Dx positions 3Á5-injury. 69,877 (19.9%) of the asthma visits had at least 1 procedure code assigned, those with asthma or cardiac procedure code are shown in Fig. 1 .