The Centers for Disease Control and Prevention (CDC) estimates of emergency department (ED) visits for 2022 were recently released.¹ It was the highest volume ever reported by the CDC, at 155.4 million visits, with an all-time high utilization rate of 473 visits per 1,000 populations. This visit rate puts American EDs back on the data line it has followed since World War II.

For quick comparison, ED visits in 2012 were about 131 million, which was 424 visits per 1,000 population. ED visit estimates and utilization rates for 2018 to 2022 are shown in Figure 1.

Click to enlarge.

The CDC data are the oldest consistent data source for the United States, but the estimates of total ED visits remain different among the national data sources. This explanation has been published.²

Why the Increase?

Why are ED visits increasing? One significant driver of the increase is the aging population. Persons aged 75 and older had 660 visits per 1,000 population in 2021. In line with the aging U.S. demographics, EDs have provided excellent service to larger numbers of senior patients. Older patients typically have higher acuity than younger patients, which often means more diagnostics and treatment. Because older patients are admitted to the hospital more often, they disproportionately affect ED staff time and work.

The reality is that visits to EDs are the result of excellent service access. The patients and the community like the service provided in the ED, the availability of a wide range of diagnostic services, the immediate entrée to hospital admission, and the unfettered 24 hours a day/365 days per year availability. Almost half of ED visits are made between 5 p.m. and 8 a.m.³ In fact, when weekends are included, about 60 percent of ED visits are made outside of traditional business hours, which is becoming even more compressed in the post-pandemic years.

The ED is clearly perceived as serving the needs of patients and as the “front door to the hospital.” There is continuing growth in the percentage of overall hospital admissions presenting through the ED. The Emergency Department Benchmarking Alliance (EDBA) data survey found that about 69 percent of hospital inpatients are processed through the ED.⁴ The efficient ED processing of sick and injured patients, sorting the ones that would benefit from inpatient care, is a hallmark of high quality emergency care. But that efficiency is impeded by patient boarding.⁵