What Really Determines Your Health? It's Not What Happens in the Exam Room
Often times I tell patients, or prospective patients, that nothing magical happens in my exam room. I know that my clinic is a very special place, and sometimes people even tell me they love just sitting in the waiting room. Patients often take their shoes off and sit on the couch in my consultation room, sometimes even lay down to chat! So yes - all of that is magical, but I’m talking about something different when I say “the real magic happens between the visits”. And that is because, only 20% of health outcomes is determined by what happens when someone sees their healthcare provider. This is called Social Determinates of Health. Let me explain.
When most people think about their health, they think about their healthcare provider. They think about the medications they take, the tests they've had or not had, the specialist they were referred to. The assumption - one that is deeply embedded in how we talk about healthcare in this country - is that health outcomes are primarily determined by the quality of medical care a person receives. I like to think that I provide high-quality medical care, but I also recognize that the science tells a very different story on what actually makes a difference for patients.
Research consistently shows that clinical care - everything that happens between a patient and a healthcare provider - accounts for only about 20% of health outcomes. The other 80%? It has almost nothing to do with what happens in an exam room.
This isn't a critique of clinicians or medicine - why would I do that! It's a call to see health for what it actually is: something that is shaped, day after day, by the conditions in which people live, work, eat, sleep, and move through the world.
The 80% We Rarely Talk About - but it’s time.
The concept of social determinants of health refers to the non-medical factors that influence health outcomes. These include the neighborhood you live in, whether you have reliable access to nutritious food, the quality of your housing, your level of education, your income, your social connections, and whether you feel safe where you live. Interestingly, I read a paper that came out earlier this year showing that those who lived in areas with more trees had lower rates of heart disease!
Public health researchers have organized these into several broad categories, and the evidence for their impact is overwhelming.
#1 Food access is one of the most foundational. People who live in food deserts (areas where fresh, affordable, nutritious food is simply not available) face significantly higher rates of diabetes, heart disease, hypertension, and obesity. No medication is as powerful as consistent access to real food, and no provider can fully compensate for a patient who is surviving on what's available at a gas station because there's no grocery store within ten miles. And no, we don’t need to be worried about Pop Tarts. We need to be worried about access to nutritious food.
#2 Housing stability and quality profoundly shapes health. Overcrowded or poorly maintained housing increases exposure to mold, allergens, and pests and therefore worsened respiratory conditions like asthma, for example. Housing instability and homelessness are independently associated with worse outcomes across virtually every health category, from mental health to chronic disease management to maternal health. It is extraordinarily difficult to manage a chronic illness when you don't know where you'll sleep next week.
#3 Transportation is a barrier that is chronically underestimated in healthcare. A patient who cannot reliably get to appointments, because they don't own a car, can't afford rideshare, or live somewhere without public transit, will miss follow-ups, delay care, and struggle to fill prescriptions. The best treatment plan in the world is only as effective as a patient's ability to access it. A very humbling concept is to consider why does someone constantly no show their appointments? Is it because they can’t even get there?
#4 Clean water and environmental quality have long been understood as fundamental to health, yet millions of Americans still live with water that isn't safe to drink or in communities with elevated exposure to industrial pollutants and poor air quality. Chronic exposure to environmental toxins is linked to elevated rates of cancer, respiratory disease, developmental disorders in children, and cardiovascular disease. ZIP code, in many parts of this country, is one of the strongest predictors of health outcomes. It is more predictive, in some analyses, than genetic risk. Why is why I LOVE the new cardiovascular risk calculator, PREVENT, because in the risk calculator it takes into account the patients zip code!!!
#5 Access to green space and the outdoors matters more than it might seem. Research has consistently linked access to parks, trees, and natural environments with reduced stress, lower rates of depression and anxiety, improved cardiovascular health, and better cognitive function. People in low-income urban areas are far less likely to have safe, accessible green space nearby.
#6 Economic stability underpins nearly all of the above. Poverty is not simply a social condition - it is a health condition. Financial stress is physiologically taxing, associated with elevated cortisol, disrupted sleep, and chronic inflammation. People with low incomes are more likely to work multiple jobs with unpredictable schedules, less likely to have paid sick leave, and more likely to delay care because of cost. The stress of financial insecurity is itself a driver of poor health outcomes, independent of any specific material deprivation.
#7 Education and health literacy shape a person's ability to navigate the healthcare system, understand diagnoses, follow treatment plans, and advocate for themselves. Low health literacy is associated with higher rates of hospitalization, worse chronic disease management, and lower rates of preventive care utilization. Low health literacy is a major driver in “non-compliance” which is why the medical community is trying to get away from using this terminology. It’s not always the patients active choice to not follow medical advice or instructions.
#8 Social connection and community round out the picture. Loneliness and social isolation are associated with health risks comparable to smoking 15 cigarettes a day, according to some estimates. Strong social networks, on the other hand, are associated with resilience, faster recovery from illness, better mental health, and longer life. In Lifestyle Medicine, we call this The Social Prescription. This is why I’ve added questions around social connection in my new patient paperwork.
What This Means in Practice
For clinicians, understanding social determinants of health means recognizing that a patient's outcomes depend heavily on factors outside your control and that truly caring for a patient means asking about those factors, not just about symptoms and labs.
It means asking whether a patient can afford their medication before prescribing it. This is why I say that a large part of my job is helping my patients have access to affordable menopausal hormone therapy and lab services.
It also means asking whether they have reliable transportation before scheduling a follow-up. Asking whether they have access to the foods you're recommending they eat - you don’t need an $80 juice fast. You need access to real foods. It’s also about asking whether they feel safe at home or not.
It also means connecting patients to resources - food assistance programs, transportation services, community health workers, housing advocates - and recognizing that these referrals are medical interventions, not extras.
For patients, it means understanding that if you're struggling with your health despite doing "everything right" medically, the barriers may be environmental and systemic rather than personal failures. It means advocating for yourself by naming these barriers to your provider and asking what support exists.
And for all of us, it means understanding that improving population health requires more than building better hospitals or training more providers. It requires addressing the conditions - economic, environmental, social - that determine whether people have a realistic chance at being well.
The Bottom Line
The 20% that happens in a clinical setting still matters enormously - to me and to all of you. Early diagnosis, effective treatment, preventive screenings, skilled and compassionate care - these save lives. But they cannot do what the other 80% does every single day.
Health is built, or eroded, in kitchens and neighborhoods, in workplaces and schools, in the quality of the air people breathe and the water they drink and the safety of the streets they walk. Medicine is most effective when it exists within a broader ecosystem that gives people the conditions they need to actually be healthy.
Treating the patient in front of you matters. So does paying attention to the world they go home to.
This article is intended for educational purposes and does not constitute medical advice.
