Dr. Ahmareen Khan is board certified in internal medicine and fellowship trained in pulmonary and critical care medicine. Dr. Khan sees patients ages 18 years and older and treats a wide range of pulmonary diseases including, but not limited to: asthma, bronchitis, COPD (chronic obstructive pulmonary disease), emphysema, pleural diseases, pneumonia, interstitial lung disease and lung cancer. She has special medical interest in pulmonary hypertension, pulmonary fibrosis and sleep medicine. Dr. Khan earned her medical degree from Sindh Medical College in Karachi, Pakistan, and completed a pulmonary and critical care fellowship at Saint Louis University Health Sciences Center. She has been serving patients in the St. Charles community since 1998.