The annual checkup
The ritual with surprisingly little evidence
Description
In 1923, a Mayo Clinic physician named Charles Mayo proposed that healthy adults should see a doctor once a year for a thorough physical examination, blood work, and urine analysis. The idea, which the American Medical Association formally endorsed in 1922, was that catching disease early — before it became symptomatic — would prevent suffering, save money, and extend life. The annual checkup became one of the most durable rituals in modern American medicine, embedded in employer health plans, insurance contracts, and the cultural expectation that responsible adults should see a doctor every year. The 2010 Affordable Care Act made a yearly preventive visit a covered benefit with no copay. By the 2020s, roughly 90 million Americans were attending an annual physical each year.
In 2012, the Cochrane Collaboration — a global network of researchers known for the most rigorous systematic reviews in medicine — published a meta-analysis of fourteen randomized trials, covering more than 180,000 patients, examining whether routine general health checks reduced morbidity and mortality. The result was striking. The pooled data showed no reduction in all-cause mortality, no reduction in cardiovascular mortality, and no reduction in cancer mortality among people who received annual checkups compared with those who did not. The 2019 update of the review, with additional trials, reached the same conclusion. The intervention that had been the cornerstone of preventive medicine for nearly a century did not appear to do what its proponents had said it would.
The Cochrane finding was not a fringe view. The US Preventive Services Task Force, the Society of General Internal Medicine, and the Choosing Wisely campaign all reached similar conclusions in the 2010s. The Choosing Wisely list specifically named the routine annual physical as a low-value intervention for asymptomatic adults. Yet the practice has persisted, in part because patients value the visit, in part because primary care infrastructure is built around it, and in part because the alternatives — targeted screening at evidence-based intervals — are harder to deliver in the current US health system. The annual checkup has become the rare medical ritual that most experts say is unnecessary and most patients still receive.
The question we're asking: how did the annual physical become standard practice, why does the evidence not support it, and what would replace it?
What we'll see: the Mayo origin, the Cochrane evidence, what does work in prevention, and the gap between guideline and practice.
Table of contents
01A Mayo Clinic idea
Charles Mayo and his brother William were the founders of the Mayo Clinic, and the institution they built in Rochester, Minnesota, became a model for integrated medical care in the early twentieth century. Charles Mayo's 1923 article in the Journal of the American Medical Association, titled The Worth of Periodic Health Examinations, argued that systematic check-ups would catch tuberculosis, hypertension, syphilis, and various malignancies in their early, treatable stages. The disease landscape of the 1920s included several conditions for which early detection genuinely changed outcomes. The case for annual examinations was reasonable in that context.
The AMA endorsement followed quickly. By the 1930s, large employers were promoting annual physicals as a benefit for white-collar employees. By the 1950s, the practice had become the standard expectation for middle-class American adults. Other countries followed in varying degrees: the United Kingdom resisted institutionalizing the annual physical and built its primary care system around presenting symptoms, while continental European systems generally adopted some version of periodic examinations.
02The 2012 review
The Cochrane review by Lasse Krogsbøll, Karsten Juhl Jørgensen, and Peter Gøtzsche, published in the BMJ in 2012, was the most thorough examination of the question ever conducted. The authors pooled fourteen randomized controlled trials, ten of which had hard endpoints — death, disease incidence — rather than process measures. The pooled analysis covered 182,880 participants and tracked outcomes over follow-up periods ranging from four to twenty-two years.
The headline finding was that general health checks did not reduce all-cause mortality (relative risk 0.99), cardiovascular mortality (0.94), or cancer mortality (1.03). The confidence intervals on these estimates were narrow enough that meaningful effects could be largely ruled out. The review also found that health checks did increase the diagnosis of conditions like hypertension and hypercholesterolemia, and increased the use of antihypertensive and lipid-lowering medications. The increased diagnosis and treatment, however, did not translate into reduced mortality. The interventions that followed from the checkups were not, on average, producing the expected clinical benefit.
03What does work
The distinction between routine annual examinations and targeted screening is the practical implication of the evidence. Several specific interventions have strong evidence for population-level mortality reduction. Blood pressure measurement and treatment of hypertension is among the most cost-effective interventions in medicine. Cholesterol screening and statin treatment for high-risk patients reduces cardiovascular events. Colorectal cancer screening through colonoscopy, sigmoidoscopy, or fecal immunochemical testing reduces colorectal cancer mortality. Cervical cancer screening through Pap testing and HPV testing has driven cervical cancer mortality down dramatically over the past fifty years.
Mammography is more contested but generally supported for women aged 50 to 74. Lung cancer screening with low-dose CT for heavy smokers has shown mortality benefit. Vaccination — influenza, COVID, pneumococcal, shingles, HPV — has clear preventive benefit. Smoking cessation counseling and pharmacotherapy is highly effective. Screening for depression and substance use disorders, with linked treatment infrastructure, has measurable population benefit.
04The persistence of the ritual
The persistence of the annual physical despite the absence of supporting evidence is a useful case study in why medical practice changes slowly. Patients value the visit. Primary care physicians have built their practices around it. Insurance contracts, post-ACA, are structured around an annual visit as a covered benefit. Removing the annual physical, even if evidence supports doing so, would require restructuring multiple layers of the health system.
There is also a cultural dimension. The annual physical functions for many patients as a check-in with the medical system, an opportunity to raise concerns, a marker of taking responsibility for one's own health. The ritual carries meaning that the underlying clinical evidence does not capture. Patients who skip their annual visits sometimes feel anxious about it. The framing of preventive medicine in American health communication has emphasized regular checkups as a marker of responsible adult behavior for so long that the practice is hard to dislodge.
05Conclusion
The annual physical is one of the more durable artifacts of twentieth-century American medicine, surviving a century after Charles Mayo proposed it and more than a decade after the strongest evidence on its effectiveness suggested it does not, on average, do what its proponents have claimed. The Cochrane data is not subtle. Routine general health checks for asymptomatic adults do not reduce mortality. Targeted screening at evidence-based intervals does. The two are not the same intervention, even if they have been culturally fused in the standard primary care visit.