Chronic obstructive pulmonary disease (COPD) includes two lung conditions—chronic bronchitis and emphysema. More than 12 million people in the United States have COPD (and COPD is the fourth leading cause of death), but another 12 million have COPD without knowing it.

How Is COPD Diagnosed?

If you're being evaluated for COPD, you can expect to receive x-rays, CT scans, and lung function tests. 

My Smoker's Cough Turned Out to Be Emphysema

I use a machine that provides extra oxygen for me to breathe

I'm a Nonsmoker, But I Have Emphysema Due to a Rare Genetic Condition

AAT deficiency is so rare, doctors may miss it

What Is COPD?

Find out more about this serious, long-term illness