Urgent care as a distinct category of American healthcare emerged in the late 1970s and early 1980s, when a small number of walk-in clinics began positioning themselves between the family doctor’s office and the hospital emergency room. The concept grew out of a straightforward problem: patients who needed same-day medical attention for non-life-threatening issues often could not get a timely appointment with their primary care physician and faced long, expensive waits in the ER. What started as a handful of entrepreneurial clinics has ballooned into an industry of roughly 14,000 centers across the United States, reshaping how millions of people access routine medical care.
Why Walk-In Clinics Appeared in the First Place
The forces that created urgent care were not mysterious. By the late 1970s, emergency departments were seeing steadily rising volumes of patients whose problems were genuine but not emergencies: sprained ankles, ear infections, minor lacerations, urinary tract infections. These visits clogged ERs designed for trauma and critical illness, driving up wait times for everyone. At the same time, getting a same-day or next-day appointment with a primary care physician was becoming increasingly difficult as demand for outpatient care outpaced the supply of general practitioners.
Urgent care centers filled that gap by offering walk-in access during extended hours, typically evenings and weekends, for conditions that needed prompt attention but not the full resources of an emergency department. The model was simple: a freestanding clinic staffed by a physician or mid-level provider, equipped to handle X-rays and basic lab work, and able to see patients without an appointment. Long waits for primary care appointments and extended emergency department wait times were the principal drivers behind the growth of these newer sites for episodic care.1PubMed Central. Urgent care centers in the U.S.: findings from a national survey
Slow Growth Through the 1980s and 1990s
The earliest urgent care centers were scattered and independent, often opened by emergency medicine physicians or family practitioners who saw a business opportunity. Through the 1980s the concept spread, mostly in suburban areas where patient volumes were high enough to sustain a walk-in practice. But growth was uneven. There was no national trade organization, no agreed-upon definition of what “urgent care” meant, and no accreditation body to distinguish a well-equipped center from a bare-bones storefront clinic. Many of these early facilities called themselves “walk-in clinics” or “minor emergency centers” rather than urgent care centers, because the term itself had not yet solidified.
The 1990s saw managed care reshape American medicine, with health maintenance organizations and preferred provider networks channeling patients toward specific doctors and facilities. This created both obstacles and opportunities for urgent care. Some HMOs viewed walk-in clinics skeptically, preferring to route patients through a gatekeeper primary care physician. Others recognized that directing patients to urgent care for after-hours needs was cheaper than paying for ER visits. The result was a slow, region-by-region negotiation over whether insurers would cover urgent care visits and at what rate.
The Boom Years and the Arrival of Private Equity
The real explosion in urgent care came in the 2000s. Several forces converged: insurance coverage for urgent care visits became more standardized, consumer expectations shifted toward on-demand healthcare, and the chronic shortage of primary care physicians showed no signs of easing. The founding of the Urgent Care Association (originally called UCAOA) in 2004 gave the industry its first national voice and began the work of defining standards, collecting data, and advocating for the sector.
Then private equity discovered the model. Investors began acquiring independent urgent care centers and rolling them into multi-site chains, attracted by the combination of recurring patient volume, relatively low capital requirements compared with hospitals, and the potential for geographic expansion. Although private equity firms started investing in the sector as early as 2007, the full push began around 2010 with the acquisitions and rapid scaling of chains like NextCare, MedExpress, and FastMed. Since then, some regional platforms have completed the full investment cycle of acquisition, growth, and sale to a larger buyer. Today, more than 2,300 urgent care centers, roughly 17% of the national total, are backed by private equity.2Journal of Urgent Care Medicine. Private Equity Ownership in Urgent Care By Number of Centers, 2024
The private equity investment thesis has evolved over time. The early strategy was straightforward consolidation: buy up independent clinics, centralize their back-office operations, and profit from economies of scale. More recently, the playbook has shifted toward building new locations from scratch in underserved markets, partnering with health systems, and expanding into services like occupational medicine, behavioral health, and chronic disease management.2Journal of Urgent Care Medicine. Private Equity Ownership in Urgent Care By Number of Centers, 2024
COVID-19 as an Inflection Point
If private equity fueled the expansion of urgent care through the 2010s, the COVID-19 pandemic cemented its place in the healthcare landscape. When the virus arrived in early 2020, urgent care centers rapidly became one of the most accessible locations for testing. Primary care offices were often closed or operating at reduced capacity, and hospitals were overwhelmed with critically ill patients. Urgent care filled the void, pivoting quickly to drive-through testing, telemedicine visits, and eventually vaccination.
Urgent care centers gained a critical role as a common location for COVID-19 testing during the pandemic response.3PubMed Central. Urgent care center wait times increase for COVID-19 results in August 2020, with rapid testing availability limited In some metropolitan areas, the scale of this role was enormous. CityMD, a large urgent care chain in the New York metropolitan area, performed 3.4 million COVID tests on 1.8 million individuals over the course of the pandemic, diagnosing roughly 17% of all reported cases in New York City.4PubMed Central. The emergence, surge and subsequent wave of the SARS-CoV-2 pandemic in New York metropolitan area: The view from a major region-wide urgent care provider That a single urgent care network could account for such a large share of a major city’s case detection illustrates how deeply embedded these centers had become in American healthcare infrastructure by 2020.
The pandemic also generated significant cash flow for the industry. COVID testing and treatment services boosted revenue at a time when many other healthcare providers were struggling financially, and the experience demonstrated to both payers and regulators that urgent care could serve as flexible frontline infrastructure during a public health crisis.
How Urgent Care Compares to the Emergency Room
One reason urgent care grew so rapidly is the enormous price difference between an urgent care visit and a trip to the emergency department for the same condition. A study comparing freestanding emergency departments, hospital-based EDs, and urgent care centers found that about three-quarters of the most common diagnoses overlapped between freestanding EDs and urgent care, and about 60% overlapped between hospital-based EDs and urgent care. Despite treating many of the same problems, prices for patients with identical diagnoses were on average almost ten times higher at both types of emergency department compared with urgent care.5PubMed. Comparing Utilization and Costs of Care in Freestanding Emergency Departments, Hospital Emergency Departments, and Urgent Care Centers
Pediatric visits show a similar pattern. Among children on Medicaid, the median payment for an urgent care visit was about $77 compared with roughly $186 for an emergency department visit, and that gap held across different diagnoses and severity levels.6Pediatrics. Urgent Care and Emergency Department Visits in the Pediatric Medicaid Population
The cost dynamic has created a perverse incentive in some markets. When urgent care centers convert to freestanding emergency departments, visit volumes tend to drop while per-visit reimbursement jumps dramatically. In one study of three facilities that made this conversion, median reimbursement per visit rose from roughly $130–$150 at the urgent care level to $1,500–$2,200 as a freestanding ED, and total facility revenue climbed even though fewer patients walked through the door.7PubMed. The Impact of Conversion From an Urgent Care Center to a Freestanding Emergency Department on Patient Population, Conditions Managed, and Reimbursement For the community, this means losing a low-cost option and gaining a high-cost one that treats many of the same conditions.
Does Urgent Care Actually Reduce ER Crowding?
This has been one of the central policy questions since urgent care began, and the evidence is more nuanced than the industry’s marketing suggests. One well-cited study found that having an open urgent care center in a ZIP code reduced total emergency department visits by about 17%, driven largely by fewer visits for less serious conditions.8PubMed Central. The impact of urgent care centers on nonemergent emergency department visits A systematic review confirmed that urgent care centers can stabilize at meaningful patient volumes and pull non-urgent cases away from the ER, with the most pronounced effect on low-acuity visits.9PubMed Central. The Role of Urgent Care Clinics in Alleviating Emergency Department Congestion: A Systematic Review of Patient Outcomes and Resource Utilization
But a different study painted a less optimistic picture. It found that while urgent care does deter some lower-acuity ED visits, the effect is small: roughly 37 additional urgent care visits are needed to prevent a single lower-acuity emergency department visit. More strikingly, the overall effect on healthcare spending was an increase, not a decrease, because urgent care generates new utilization rather than simply redirecting existing visits.10PubMed. Urgent Care Centers Deter Some Emergency Department Visits But, On Net, Increase Spending In other words, some people who would not have gone to the ER (and might not have sought care at all) now visit urgent care, adding to total spending even as a modest number of ER trips are avoided. The evidence, taken together, suggests urgent care helps at the margins but is not a silver bullet for ER overcrowding.
Who Works at an Urgent Care Center
The staffing model at urgent care centers has evolved significantly since the early days when most were run by a solo physician. Today, nurse practitioners and physician assistants play a central role. These advanced practice providers are licensed to diagnose and treat common acute conditions under physician supervision, and they have become a fixture of the urgent care workforce. Their presence allows centers to stay open longer hours, see more patients, and keep costs lower than a physician-only staffing model would permit.11PubMed. Urgent care medicine and the role of the APP within this specialty
This staffing approach has been essential for the industry’s growth. The United States has faced a primary care physician shortage for decades, and urgent care could not have expanded to its current scale if every center required a physician on site at all times. In many states, nurse practitioners now practice with significant autonomy, making them a natural fit for a setting where the conditions seen are generally predictable and well within established clinical guidelines.
Quality of Care Questions
The speed and convenience that make urgent care attractive also raise questions about quality, particularly around antibiotic prescribing. Walk-in clinics have historically been associated with high rates of unnecessary antibiotic use for respiratory infections, partly because patients arrive expecting a prescription and providers face pressure to keep visits short. But the picture is improving. A large antibiotic stewardship program across an urgent care network showed that structured interventions can meaningfully change prescribing behavior: antibiotic prescribing for respiratory conditions dropped from about 48% to 33% over the course of the initiative, and 95% of individual clinicians reduced their prescribing rates.12PubMed Central. Implementation of an Antibiotic Stewardship Initiative in a Large Urgent Care Network
A separate challenge is coordination with primary care. When you visit an urgent care center, your regular doctor may never learn what happened there. Shared electronic health records can bridge this gap. Research on after-hours care models has found that when urgent care providers can post their notes directly to the patient’s primary care physician’s inbox through a shared system, informational continuity improves dramatically.13PubMed Central. After-Hours Care and its Coordination with Primary Care in the U.S. One academic family medicine practice that integrated an urgent care clinic into its operations found that access to the full electronic medical record and a primary-care-oriented approach allowed clinicians to close gaps in preventive care or chronic disease management on about a quarter of urgent care visits.14Family Medicine. Integrating an Urgent Care Clinic Into an Academic Family Medicine Practice These are encouraging results, but they come from settings with intentional integration. The typical standalone urgent care center, especially one owned by a private equity chain, may have no electronic connection to your primary care provider at all.
Where Urgent Care Centers Cluster, and Where They Do Not
Urgent care centers have not spread evenly across the country. Research on their geographic distribution has found that centers tend to cluster in suburban and urban areas with higher concentrations of privately insured patients. They selectively avoid rural areas, communities with a high share of low-income residents, and areas where private insurance coverage is low.15PubMed Central. Community characteristics associated with where urgent care centers are located: a cross-sectional analysis This pattern makes economic sense for the operators but raises equity concerns. The patients who face the greatest barriers to accessing timely primary care are often the same ones least likely to have an urgent care center nearby.
Some of the most recent private equity activity has targeted rural and Medicaid-heavy markets, which could begin to shift this pattern.2Journal of Urgent Care Medicine. Private Equity Ownership in Urgent Care By Number of Centers, 2024 Whether investor-driven expansion into underserved areas will produce the same access benefits as in wealthier suburbs remains an open question. Rural communities have smaller patient pools, lower reimbursement rates, and thinner workforces, all of which make sustained operation more difficult.
Urgent Care Models Outside the United States
The walk-in urgent care concept is not exclusively American, though it has taken different forms elsewhere. Countries with national health systems have generally tried to build urgent care into their existing structures rather than allowing a parallel private market to develop. Israel, for example, has integrated urgent care centers into its national health system, requiring all health insurance funds to reimburse patients who use them. England has taken a similar integrative approach, though its urgent care services tend to be nurse-led rather than physician-led.16PubMed Central. Community-based urgent care in Israel and worldwide In most other countries, urgent care remains predominantly a private venture, similar to the American model.
A comparative analysis of emergency and urgent care systems in Australia, Denmark, England, France, Germany, and the Netherlands identified four main reform approaches being pursued across these countries: extending the hours during which urgent primary care is available, centralizing the provision of urgent primary care into dedicated facilities, improving coordination between urgent primary care and hospital emergency departments, and concentrating emergency care at fewer hospitals.17PubMed. Emergency and urgent care systems in Australia, Denmark, England, France, Germany and the Netherlands – Analyzing organization, payment and reforms Many of these reforms address the same underlying problems that spawned American urgent care, but through centralized planning rather than market-driven entrepreneurship.
The Regulatory Patchwork
One of the oddities of urgent care’s history is that the industry grew to enormous scale with remarkably little dedicated regulation. In most states, urgent care centers are licensed as physician offices rather than as a distinct facility type, which means they are not subject to the same oversight as hospitals or ambulatory surgery centers. There is no federal definition of what constitutes an urgent care center, no mandatory minimum equipment list, and no required staffing ratios.
Some states have begun to address this gap. New York, for instance, has examined how its regulatory framework for ambulatory care services might be modernized, with researchers recommending that mechanisms from mandatory reporting to licensure to certificate-of-need requirements remain flexible and match the level of consensus on appropriate regulation.18PubMed Central. Redesigning the regulatory framework for ambulatory care services in New York The challenge is real: regulate too heavily and you choke off the access benefits that make urgent care valuable; regulate too lightly and you get wide variation in what patients encounter behind the “urgent care” sign.
Voluntary accreditation through the Urgent Care Association has given some centers a way to signal quality, but participation is optional and far from universal. The result is a landscape where a patient driving past two different urgent care centers on the same road may find dramatically different levels of staffing, equipment, and capability behind each door, with no easy way to tell the difference from the outside.
Why People Choose Urgent Care Over Other Options
Understanding what pulls patients into urgent care rather than a doctor’s office or an ER helps explain why the model has been so durable. Research synthesizing dozens of studies on patient decision-making identified several recurring themes: difficulty accessing or lack of confidence in primary care, perceived urgency and the desire for reassurance from a medical setting, convenience factors like location, walk-in availability, and extended hours, and practical considerations like cost.19PubMed Central. Why Do People Choose Emergency and Urgent Care Services? A Rapid Review Utilizing a Systematic Literature Search and Narrative Synthesis The influence of family members and other healthcare professionals also played a role in steering people toward one care setting over another.
Convenience looms especially large. Many people cannot take a half-day off work to see their primary care physician during business hours, and the prospect of waiting four or five hours in an emergency department for a non-critical issue is unappealing. An urgent care center that is open until 8 p.m., accepts walk-ins, and promises a visit length under an hour solves a logistical problem that the traditional healthcare system has been slow to address. That practical appeal, more than any single clinical innovation, is what has driven urgent care from a handful of clinics in the late 1970s to a ubiquitous feature of American strip malls and shopping centers today.