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Brian Brennan, MD

Facilities Fergus Falls Main Clinic


Lake Region Medical Group welcomed Brian Brennan, MD to Lake Region Healthcare’s Fergus Falls Clinic in the Allergy & Immunology Department in 2022.

Dr. Brennan is an experienced Allergist with a 30+ year history of working in clinical medicine. Most recently he has worked as an Allergist at Stevens Community Medical Center in Morris. He owned and operated Brennan Allergy Clinic in Sioux Falls from 2012 to 2016 and has served as active medical staff at Avera and Sanford in Sioux Falls for many years.

He received his medical degree at Rutgers University in New Jersey and completed his Fellowship in Allergy & Immunology at Creighton University in Omaha, NE.

Dr. Brennan specializes in diagnosing and treating conditions such as hay fever, sinus trouble, asthma, food allergies, eczema, and hives. He is board certified in Allergy/Immunology.

His hobbies include enjoying outdoor activities together with his wife such as biking, walking, kayaking, cross country skiing, snowshoeing and bird watching.