As many as one in two Americans has some kind of illness or condition that was, at one time, considered a pre-existing condition by insurance companies before Obamacare. Here are the top 10 most common conditions for Americans, as analyzed by CNN.
Acne is one of the most common chronic pre-existing conditions and is the most common skin condition in the United States.
More than 39 million American adults struggle with anxiety. It's the second-most common pre-existing condition in the country, according to a 2005 study.
According to the latest numbers from the U.S. Centers for Disease Control and Prevention, there are 30.3 million people with diabetes in America.
There are 25.2 million asthmatics in the United States, according 2015 numbers from the Centers for Disease Control and Prevention.
More than 25 million American adults have sleep apnea, according to the Sleep Foundation. People with the condition pause when they breathe in their sleep. The pauses can last for seconds or minutes and may happen as many as 30 times an hour.
More than 20.8 million American adults who struggle with depression, a mental health disorder in which people have a constant feeling of despondency.
Chronic obstructive pulmonary disease, known as COPD, is the third leading cause of death in the United States. More than 15.7 million Americans have COPD, which is an umbrella term used to describe lung diseases that block airflow and make it difficult to breathe.
More than 18.5 million American adults struggle with extreme obesity.
Atherosclerosis, or clogged arteries, which can lead to heart problems, are one of the top 10 most common health conditions for Americans. About 16 million American adults struggle with it, according to a 2008 study.
The National Cancer Institute estimates there were nearly 1.7 million new cases of cancer diagnosed in the U.S. in 2016, with nearly 600,000 people dying from the disease. The number of people living beyond a cancer diagnosis reached nearly 14.5 million in 2014 and is expected to rise to almost 19 million by 2024.