Sumbul Meraj, MD, an Infectious Disease Specialist with HSHS Medical Group Infectious Disease – O’Fallon

Get to know Infectious Disease Specialist Dr. Sumbul Meraj, who serves patients in O’Fallon, Illinois.

Dr. Meraj is a fellowship-trained infectious disease specialist who specializes in the treatment of various infectious diseases and infection control – treating conditions requiring selective use of antibiotics, diagnosing and treating fevers of unknown origin, diagnosing and treating infectious disease in the HIV population, tropical medicine, various skin, and soft tissue infections and providing wound care. She is in practice with HSHS Medical Group Infectious Disease – O’Fallon in Illinois.

HSHS Medical Group has more than 350 specialists and primary care providers across central and southern Illinois. Their goal is to support physicians and health professionals in providing patient-first care. 

The doctor’s acclaimed career in medicine began after she earned her medical degree from Dow Medical College in Karachi, Pakistan. Wanting to further her education, she relocated to the United States. Once there, she completed her residency in internal medicine at Saint Joseph Hospital in Chicago, followed by her fellowship in infectious diseases at Saint Louis University Hospital in Missouri.

As a testament to her success, Dr. Meraj is board-certified in internal medicine by the American Board of Internal Medicine, a physician-led, non-profit, independent evaluation organization driven by doctors who want to achieve higher standards for better care in a rapidly changing world. She is also a member of the American College of Physicians.

Infectious disease is a medical specialty dealing with the prevention, the diagnosis, and the treatment of infections. An infectious disease specialist’s practice also consists of managing nosocomial (hospital-acquired) infections.

In her free time, Dr. Meraj enjoys writing poetry, reading, singing, traveling, as well as art and literature.

Learn more about Dr. Sumbul Meraj:

Through her findatopdoc profile, or through HSHS Medical Group,


FindaTopDoc is a digital health information company that helps connect patients with local physicians and specialists who accept your insurance. Our goal is to help guide you on your journey towards optimal health by providing you with the know how to make informed decisions for you and your family.

Karen Johnson

Karen Johnson is an Associate Content manager for FindaTopDoc and responsible for working with distinguished physicians in documenting their significant accomplishments in their field. Karen is a CPR instructor and is a member of her local theater group.