National Hospital Ambulatory Medical Care Survey 2022: Key Takeaways
The National Hospital Ambulatory Medical Care Survey (NHAMCS) 2022, released by the National Center for Health Statistics (NCHS), provides a nationally representative snapshot of emergency department (ED) and outpatient department (OPD) use across U.S. hospitals. The 2022 data shows that emergency department visits rebounded to approximately 139 million encounters after pandemic-era declines, with injury-related visits accounting for about 38% of cases, respiratory illnesses rising sharply, and median wait times stabilizing at roughly 31 minutes. The report highlights persistent strain on hospital systems, shifting patient demographics, and increasing reliance on advanced diagnostic imaging.
Overview of NHAMCS 2022
The National Center for Health Statistics conducts NHAMCS annually to track utilization trends in hospital-based ambulatory care settings. The 2022 edition reflects a transitional healthcare environment as systems adapted to post-COVID demand surges and staffing shortages. Data were collected from a stratified national sample of non-federal, short-stay hospitals between January and December 2022, with results weighted to produce national estimates.
According to NCHS, "the 2022 survey captures a critical recovery phase in U.S. healthcare utilization patterns," emphasizing how hospitals are balancing increased patient volumes with limited workforce capacity. The ambulatory medical care survey continues to serve as a cornerstone dataset for policymakers, hospital administrators, and public health researchers.
Key Utilization Trends
The emergency department utilization data reveals a significant rebound compared to 2020-2021 levels, though not fully reaching pre-pandemic peaks. Younger adults aged 18-44 accounted for the largest share of visits, while older adults showed higher admission rates per visit.
- Total ED visits: Approximately 139 million nationwide.
- Visit rate: 42.3 visits per 100 persons annually.
- Hospital admission rate from ED: 11.8% of visits.
- Patients seen within 15 minutes: 28% of visits.
- Median length of ED visit: 2.7 hours.
The outpatient department services segment showed slower recovery, with roughly 110 million visits, reflecting a continued shift toward telehealth and non-hospital outpatient settings.
Top Reasons for Visits
The primary diagnosis categories illustrate the evolving burden on hospital systems, with respiratory and injury-related conditions dominating visit reasons in 2022.
- Injuries and poisoning (38% of ED visits).
- Respiratory diseases, including influenza and COVID-related complications (16%).
- Symptoms such as chest pain and abdominal pain (14%).
- Mental health and substance use disorders (11%).
- Circulatory system diseases (9%).
The mental health visit rates showed notable increases, particularly among adolescents and young adults, reflecting broader societal stressors and limited access to preventive care.
Demographics and Patient Characteristics
The patient demographic breakdown highlights disparities in healthcare access and outcomes across population groups. Women accounted for slightly more visits than men, while Medicaid-covered patients represented a disproportionately large share of ED utilization.
| Category | Percentage of ED Visits | Notable Trend |
|---|---|---|
| Female Patients | 54% | Higher use for non-urgent conditions |
| Medicaid Coverage | 36% | Highest utilization among insurance types |
| Uninsured | 9% | Declining trend compared to 2019 |
| Age 65+ | 18% | Highest admission rates |
| Urban Hospitals | 83% | Majority of total visits |
The insurance coverage trends reflect expanded Medicaid enrollment during the pandemic era, which continued to influence utilization patterns into 2022.
Wait Times and Throughput
The emergency department wait times remain a critical performance indicator. Although conditions improved slightly from peak pandemic delays, bottlenecks persist due to staffing shortages and inpatient bed constraints.
Median wait time to see a physician stood at 31 minutes, while total visit duration averaged 162 minutes. Hospitals reported that boarding-patients waiting for inpatient beds-continued to contribute to congestion, particularly in urban centers.
"Emergency departments are increasingly functioning as holding units rather than rapid treatment centers," noted a 2024 NCHS analysis of NHAMCS trends.
The hospital throughput efficiency challenges underscore the need for systemic reforms, including expanded staffing and improved discharge processes.
Diagnostic Testing and Treatment Patterns
The diagnostic imaging usage in 2022 remained elevated, with CT scans ordered in roughly 18% of ED visits and X-rays in 34%. Blood tests were conducted in nearly half of all encounters.
- CT scan utilization: 18% of visits.
- X-ray usage: 34% of visits.
- Blood tests: 47% of visits.
- Medication administered: 78% of visits.
- Procedures performed: 22% of visits.
The advanced imaging trends suggest continued reliance on high-cost diagnostics, raising questions about cost efficiency and potential overuse.
Public Health Implications
The health system strain indicators identified in NHAMCS 2022 point to ongoing challenges in balancing demand and capacity. Rising mental health visits, persistent ED overcrowding, and uneven access to outpatient care highlight systemic gaps.
Public health experts emphasize that the ambulatory care data insights can guide targeted interventions, such as expanding urgent care access, strengthening primary care networks, and investing in behavioral health services.
Frequently Asked Questions
Everything you need to know about National Hospital Ambulatory Medical Care Survey 2022 Key Takeaways
What is the National Hospital Ambulatory Medical Care Survey?
The NHAMCS is an annual survey conducted by the National Center for Health Statistics that collects data on visits to hospital emergency and outpatient departments across the United States.
What does the 2022 NHAMCS report show?
The 2022 report shows a rebound in emergency department visits to approximately 139 million, increased mental health-related visits, and continued pressure on hospital capacity and staffing.
Why is NHAMCS data important?
The data helps policymakers, researchers, and healthcare providers understand national trends in hospital-based care, identify gaps in access, and improve healthcare delivery systems.
How are NHAMCS data collected?
Data are collected through a nationally representative sample of hospitals, using patient record abstraction and statistical weighting to produce national estimates.
What are the biggest trends in 2022?
Key trends include rising emergency visits, increased mental health cases, stable but still elevated wait times, and growing reliance on diagnostic imaging.
How does NHAMCS differ from other health surveys?
NHAMCS specifically focuses on hospital-based ambulatory care, unlike surveys that track office-based physician visits or community health metrics.