According to research by Avalere, over 100 million Americans have pre-existing medical conditions. Americans with a pre-existing condition may sometimes face challenges when it comes to medical coverage, particularly when there is a pre-existing conditions clause attached to their health insurance policy. Pre-existing medical conditions don’t necessarily mean that coverage is automatically void, but a pre-existing condition clause can be a hurdle for many Americans who suffer from certain types of medical issues. A pre-existing medical condition is one that an individual was diagnosed with before purchasing a health insurance policy. It may be something that caused issues in the past that required medical attention, or may still cause current symptoms. Pre-existing conditions can include things like cancer, high blood pressure, diabetes, and heart disease, among others.