Iatrogenesis: When Treatment Causes Harm?
What Is Iatrogenesis?
Iatrogenesis refers to illness or injury caused directly by medical care—whether through a physician’s actions, prescribed medications, or invasive procedures. Examples include surgical complications, hospital-acquired infections, and harmful side effects from drugs. While some risks are unavoidable, many instances of iatrogenesis stem from unnecessary or poorly chosen interventions that never should have occurred.
The Cost of Unnecessary Care
The U.S. health system has long tolerated—and even rewarded—overuse of invasive, high-cost interventions. Patients with back pain, for example, are often directed toward surgery when physical therapy or injections could achieve similar outcomes with far less risk. In cardiology, aggressive interventions may be chosen over lifestyle or medication-based management, even when evidence suggests conservative care is equally effective.
Each unnecessary procedure carries its own dangers. A surgery may lead to infection, disability, or repeat operations. A prescription may trigger adverse reactions or long-term dependency. These harms are magnified when the original intervention was never medically indicated in the first place.
Why Does It Happen?
Several forces drive this problem. Fee-for-service reimbursement creates financial incentives for more procedures, not necessarily better ones. Fear of malpractice encourages defensive medicine, leading doctors to order unnecessary tests “just in case.” Patients, too, may push for the most aggressive or technologically advanced option, equating cost and complexity with quality.
In this environment, physicians are often left balancing patient expectations, financial pressures, and fragmented guidelines—conditions that make iatrogenesis more likely.
A Call for Conservative, Evidence-Based Care
Reducing iatrogenesis requires a shift in philosophy. As outlined in reform frameworks, optimum care means achieving the desired outcome with the least invasive, least risky, and most conservative intervention available. Instead of defaulting to surgery, physicians should begin with physical therapy, counseling, or lifestyle adjustments. Instead of prescribing multiple medications, they should consider behavioral health supports or preventive strategies.
When physicians and health systems adopt evidence-based protocols, unnecessary interventions decline, risks are reduced, and outcomes improve. Managed clinical care—not managed insurance—provides the structure for this approach, ensuring consistency across providers and aligning incentives around patient well-being rather than utilization.
Putting “Do No Harm” Back at the Center
Iatrogenesis is a sobering reminder that more care is not always better care. Each time a patient undergoes an unnecessary surgery, takes an unneeded medication, or receives an avoidable diagnostic test, they are exposed to harm without benefit.
To honor the principle of “first, do no harm,” health care reform must prioritize conservative, evidence-based care. Physicians should be supported by systems that emphasize safety and consistency, patients should be educated about risks, and incentives should reward outcomes rather than volume.
By reducing unnecessary interventions, we can lower costs, improve trust, and most importantly, protect patients from the harm that too often comes from the very system meant to heal them.
About the Author
John Trimmer
Making Ordinary Care Extraordinary
