Critical Care Workforce in the United States: Current Landscape and Challenges

Critical care delivery is grounded in and sustained by a highly specialised, multidisciplinary team of clinicians. However, workforce shortages can have considerable impact on quality of care and patient outcomes. Insufficient staffing resources can occur for many reasons such as burnout, ageing personnel and workforce maldistribution. This article explores the current climate in the critical care workforce in the United States.

Intensive care units (ICU) worldwide rely on highly specialised, multidisciplinary teams which deliver lifesaving care to critically ill patients (Otaibi et al. 2025; Wei et al. 2022). This workforce includes intensivist physicians, advanced practice providers (APPs), nurses, pharmacists, respiratory therapists and dietitians. These highly trained professionals play a vital role in providing high quality care to patients in times of despair. Despite significant advances in critical care, the global workforce faces profound challenges, including staffing shortages, workforce maldistribution, ageing personnel, burnout and increasing patient complexity (Sprung et al. 2023; Moss et al. 2016; Leuchter et al. 2025; Dill and Salsberg 2008; Burdick et al. 2023). These issues are particularly problematic in resource-limited areas which cannot support an around-the-clock intensivist team, further intensifying a workforce crisis. This paper will discuss the current trends in the critical care workforce in the United States, including workforce shortages, evolving provider roles and retention issues impacting the future of critical care delivery.

It’s 1 AM on a Saturday morning in a level 1 trauma centre. The surgical critical care service is currently at a census of 26 patients with 18 of those patients critically ill. The patients span across 3 separate units on 3 different floors of the ICU tower. The current providers staffing the service is a single acute care nurse practitioner (NP), a general surgery resident and an acute care surgeon as back-up at home, having left at 1800 the night before with a 0600 start the following morning.

Suddenly the NP’s phone rings from two floors below in the neuro ICU: a nurse reports a sudden change in mental status. The night nurse is a new graduate who completed ICU residency this week; about 70% of the night staff are within their first year of practice, and the most senior nurse is the charge nurse with three years of ICU experience.

The NP runs to the bedside and finds a patient recovering from haemorrhagic stroke with an abrupt decline to a GCS of 4, requiring immediate intubation. As anaesthesia arrives and rapid-sequence intubation medications are pushed, the patient arrests; the NP directs ACLS and calls the attending at home with an update. During resuscitation, another call comes in from the surgical ICU: an intubated patient in his third week of admission has begun seizing. The NP gives a verbal order for 4 mg of lorazepam and calls the resident, who was strategically napping due to work hour requirements, and directs the resident to go to that room. After three cycles of CPR, return of spontaneous circulation is obtained.

As the team prepares the patient for urgent head imaging, the NP is called again from the surgical ICU: seizures persist despite the initial dose. He returns back upstairs to assess the patient alongside the resident; they administer an additional bolus and initiate a continuous infusion to stabilise the patient. He continues managing these crises alongside the remaining patients on the service. When the day team arrives for sign out, the NP feels palpable relief—an overwhelming night, an overwhelming responsibility—and he still has to return in less than 12 hours to do it again.

Critical care medicine is a high demand, resource-intensive, complex work environment that requires its providers to be well versed in continuous monitoring, rapid decision making and coordination of complex care. This exceedingly complex system depends on the availability and integration of highly specialised healthcare professionals. However, many areas are seeing significant workforce shortages which pose a risk to patient outcomes. To better understand the crisis, we must first identify the current environment. The current size and composition of the critical care workforce is somewhat difficult to estimate as many providers may work in hybrid roles, dividing their time elsewhere such as in pulmonary, anaesthesia or surgery, in both the inpatient and ambulatory space. Additionally, identifying accurate global workforce numbers is difficult due to the lack of a single international registry collecting this data. Further complicating our understanding is the maldistribution of resources to higher income countries which skews estimates, demonstrating a surplus in some areas and a severe deficit in others. Therefore, this article will focus only on the critical care workforce in the United States.

Intensivist Physicians

Critical care operates within a collaborative, team-based practice model in which the intensivist physician directs a multidisciplinary group of healthcare professionals in the delivery of patient care. This coordinated approach has been consistently associated with improved clinical outcomes (Wei et al. 2022; Weled et al. 2015; Kim et al. 2010; Wilcox et al. 2013). However, the effectiveness of this model is contingent upon adequate staffing and the availability of appropriately trained personnel across all disciplines. The challenge of maintaining sufficient workforce capacity has been particularly pronounced in the United States, where the Association of American Medical Colleges (AAMC) has predicted a physician deficit of between 46,000 and 121,000 physicians across all specialties by 2034 (Dill and Salsberg 2008). Within critical care medicine specifically, there are currently an estimated 29,000 physicians practising in adult and paediatric intensive care settings (Society of Critical Care Medicine 2024). National workforce projections suggest a modest overall surplus of 1,700 critical care physicians by 2033; however, this aggregate estimate masks substantial regional variability (Society of Critical Care Medicine 2024; HRSA 2025). For example, New York is predicted to have a surplus of 1,270 critical care physicians, while Florida is expected to experience a shortage of 330 by the year 2033, highlighting the potential limitations of delivering consistent team-based care across disparate regions (HRSA 2025). Recognising the maldistribution of the workforce and significant deficits in resource-limited areas, the AAMC reported an increase in critical care physicians of 1,000 between 2020 and 2022, accompanied by the expansion of critical care training programmes to help combat the intensivist workforce crisis (Dill and Salsberg 2008).

Advanced Practice Providers

Similarly, the U.S. Bureau of Labor Statistics projects national growth in both Nurse Practitioners and Physician Assistants, collectively termed Advanced Practice Providers (APPs), of 40% and 20%, respectively (HRSA 2025; Bureau of Labor Statistics n.d.). While a majority of this growth is expected to supplement the primary care workforce, there has been an increase in postgraduate critical care education programmes, termed fellowships, which may signify increased interest in this specialty. Currently, there is an estimated 30,000–50,000 acute care nurse practitioners and approximately 2,000–30,000 physician assistants practising in critical care medicine (Society of Critical Care Medicine 2024; Hunton et al. 2025). These estimates are likely to be grossly underestimated due to hybrid working roles and difficulty with survey collection. The growth in the advanced practice provider workforce may be alleviating some of the original dire predictions of the critical care physician supply. Advanced practice providers enhance staffing flexibility and improve access to care, specifically in areas with limited physician resources. Innovative critical care models utilising APPs with tele-ICU supervision have been shown to be effective in managing complex and critically ill patients where physician intensivist resources are limited (Qtait et al. 2026; Fusaro et al. 2019). Variability in scope and standards of practice can be a threat to expansion of care, thus impacting patient outcomes.

Nurses

Critical Care Nurses are essential to the healthcare delivery model and without nurses, the system would fail. It is typical for each critical care nurse to oversee one to two patients during a 12-hour shift. However, due to recent staffing shortages, some nurses have had to manage up to three critically ill patients at a time. Recent estimates suggest there are between 64,000–500,000 critical care registered nurses employed in ICUs across the United States alone (Society of Critical Care Medicine 2024; AACN 2021). Similar to other professions, it is difficult to estimate these numbers globally due to the lack of a centralised source for data collection. However, some estimates indicate that approximately 900,000–1 million nurses globally are practising in intensive care units (World Health Organization 2025).

The critical care nursing workforce faces several significant challenges, including the rising median age of providers, level of burnout and increasing intent-to-leave rates. The median age of a registered nurse in the United States is 46 years old, with more than 25% of nurses reporting that they will leave the profession within the next 5 years (Smiley et al. 2023). It is predicted that the United States will be short 200,000 registered nurses by 2033, and while not all of those shortages will be in critical care, post-pandemic survey findings from the American Association of Critical Care Nurses (AACN) suggest that 66% of acute care nurses have considered leaving the nursing profession (AACN 2021; HRSA 2026).

Respiratory Therapists and Dietitians

Additional key members of an intensivist team include respiratory therapists (RTs) and dietitians. Similarly to other critical care professionals, this workforce is steadily continuing to decline. Extensive data, for both RTs and dietitians, suggest that patient care outcomes improve when these professionals are integrated into the multiprofessional critical care team. However, it is estimated that thousands of RTs will leave the workforce by 2030, while enrolment into formal RT education programmes has declined by 27% since 2010 (Society of Critical Care Medicine 2024). Overall, HRSA is estimating that there will be a shortage of 9,000 respiratory therapists by 2033 (HRSA 2026). While data regarding dietitians in critical care is limited, recent estimates report that between 24%–60% of dietitians practise within critical care settings. However, those dietitians are only granted about 4 hours per week for critical care patients, roughly 0.1% FTE (Derouin et al. 2021; Terblanche 2019). These numbers fail to support the growing number of critically ill patients needing access to highly qualified providers.

Pharmacists

Critical care pharmacists are essential members of the multidisciplinary team. These highly trained providers reduce costs, improve compliance to protocols and improve patient outcomes (Rech et al. 2021; Marshall et al. 2008; Lee et al. 2019). Recent recommendations from the AACN, The American College of Clinical Pharmacy, the American Society of Health System Pharmacists, the Institute for Safe Medication Practices and the Society of Critical Care Medicine (SCCM) suggest that every critical care patient admitted to the ICU should have a critical care pharmacist as an active member of their care team (Sikora et al. 2025). Essential patient care activities for critical care pharmacists extend beyond medication reconciliation and should include proactive advisement and shared decision making (Sikora et al. 2025). Like other professions, there is no central repository to collect data on the number of critical care pharmacists globally. In the US, there are approximately 3,600 board-certified critical care pharmacists. While the interest in critical care among pharmacy trainees grows, the limited availability of critical care residency positions results in many qualified applicants going unmatched (Sikora and Martin 2022).

Burnout

The coronavirus pandemic accelerated existing critical care staffing shortages due to rising rates of burnout. Post-pandemic surveys of healthcare workers revealed significant levels of emotional exhaustion, depersonalisation and a reduced sense of professional accomplishment (Sprung et al. 2023; Moll et al. 2022). Additionally, high levels of post-traumatic stress disorder were observed in critical care team members. While these issues existed prior to 2020, the added stress of a global pandemic accelerated rates of burnout in members of the multiprofessional team (Moll et al. 2022; Gómez-Urquiza et al. 2017). Shortages of personal protective equipment, staffing model changes and diminishing support from the general public during the pandemic intensified burnout syndrome for the critical care team. Burnout is associated with increased job turnover, reduced job satisfaction, reduced patient satisfaction and decreased quality of care (Moss et al. 2016). Patient care suffers when burnout exists. Working in high-acuity environments with increasingly complex patients and technologies, in conjunction with an around-the-clock coverage model, further complicates the critical care workforce crisis.

Maldistribution of Resources

While the supply of critical care providers varies by care team member, workforce projections are further complicated by the geographic maldistribution of intensive care resources, such as bed capacity. Critical care teams tend to concentrate where beds are available, leaving gaps in underserved areas. The uneven distribution of ICU beds between high and low income regions highlights a significant disparity in access to essential care, with more than 25% of countries reporting fewer than one ICU bed per 100,000 patients (Sen-Crowe et al. 2021; Zhang et al. 2021). In the U.S., it is estimated that 1.8% or roughly 5 million citizens have no access to an ICU bed, while another 26.8% lived greater than an hour’s drive from critical care units. Only 1% of ICU beds are in rural locations, while 93% are located in urban areas (Burdick et al. 2023). Additionally, these numbers do not account for specialised ICUs like neuro or cardiac critical care which provide needed resources for specialised cases.

From a facility perspective, staffing shortages create a misalignment between physical and human capital (Leuchter et al. 2025). For example, during a critical care nursing shortage hospitals may have ICU beds but are forced to keep those beds closed for admissions. This can result in an excess of physician providers without patients to care for, affecting compensation for those on productivity models or creating salaried costs without corresponding revenue. Additionally, closed ICU beds often lead to patients being held in the emergency department, straining resources and limiting access for other emergent conditions (Bailey 2023). In these cases, organisations are forced to find temporary solutions for adequate coverage, typically through the utilisation of locum staff. It is estimated that locum staff cost up to 40% more than employed staff, thus significantly increasing the cost of care (Alumni Healthcare Staffing 2024). There are both positive and negative consequences on staff morale when utilising temporary staff. Permanent staff may initially be grateful for relief in staffing and its impact on the ability to take time off or a reduced patient load (Weyn 2023). However, with the long-term utilisation of locum staff there can be a sense of resentment in dramatic differences in compensation, reduced continuity of care and a perceived extra burden in supervision by the permanent staff.

Workforce shortages in critical care have considerable impacts on patient care quality and cost of care. In many emergent conditions such as sepsis, stroke or acute myocardial infarction, timeliness to treatment directly impacts outcomes (Evans et al. 2021; Xian et al. 2022; Nallamothu et al. 2015). Time to treatment is a key performance indicator for quality metrics. For patients who have limited access to a health system with critical care services, this may mean a delay in care that could significantly impact long-term outcomes and subsequently mortality. Delays in ICU admission lead to delays in medical decision-making, which can necessitate longer lengths of stay and subsequently increased cost. Longer ICU stays have significant implications on the patient’s recovery and functional status after discharge (Pandharipande et al. 2013).

Conclusion

In conclusion, critical care delivery depends heavily on a fragile and dissolving workforce. Increasing patient loads, driven by staffing shortages, have placed additional strain on the system, subsequently contributing to increased provider burnout. Compounding the issue is an ageing population and growing intent-to-leave rates. At the same time, limited availability of specialised support and an uneven geographic distribution of ICU resources creates disparities in access to care. The pandemic intensified these already looming issues, accelerating workforce attrition and amplifying psychological stress among the multiprofessional team. Operationally, staffing shortages disrupt the balance between physical and human resources, forcing hospitals to close ICU beds despite capacity or to hire additional providers at extreme costs, leading to inefficiencies in care delivery and financial strain. These interconnected challenges not only weaken the healthcare system but also compromise patient outcomes.

Addressing these challenges will require coordinated investment in workforce development, including expanding training pipelines, improving retention strategies and supporting the well-being of all members of the critical care team. Policymakers must also prioritise equitable distribution of resources to ensure all regions have access to adequate critical care, including specialised support services. Innovative care models and staffing approaches can help optimise existing resources while maintaining high quality patient care. We must take deliberate and collaborative action now, to strengthen our workforce and build a more resilient system for future generations to protect and improve patient outcomes.

Conflict of Interest

None.