About
Dr. Joseph Hennessy is a Chicago native who has delivered primary care to colleagues and prominent community members for over three decades. His peers call him the "Doctor's doctor," a reflection of the trust he has earned across the city's medical community. He graduated magna cum laude from Illinois Benedictine College before earning his medical degree at Rush Medical College. He completed his internship and residency at Rush University Medical Center, where faculty recognized him as Intern of the Year, Resident of the Year, and Attending of the Year.
Dr. Hennessy holds board certification and serves as an Assistant Professor and Senior Attending physician at Rush University Medical Center. He is a Fellow of the American College of Physicians and a member of the Chicago Medical Society. Castle Connolly and Chicago Magazine have both named him a Top Chicago Doctor. Since 2004, he has served as the Chicago White Sox Team physician. He also volunteers as Medical Director of Community Health, the largest free clinic in the United States. Outside the clinic, Dr. Hennessy enjoys outdoor cycling, Peloton, Chicago's restaurant scene, and time with his wife and children.
Education & Training
Undergraduate
Illinois Benedictine College, undergraduate degree, magna cum laude
Medical School
Rush Medical College
Residency
Rush University Medical Center
Additional Training
Internship at Rush University Medical Center
Certifications
Conditions Treated
Who is Dr. Hennessy right for?
Dr. Hennessy is a strong fit for adults seeking an experienced internist with deep roots in Chicago medicine. Patients managing chronic conditions benefit from his three decades of primary care expertise. Those who need reliable specialist referrals gain from his extensive network across the city. His panel cap of 50 families ensures meaningful access and continuity of care.
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Frequently Asked Questions
Dr. Hennessy specializes in internal medicine and primary care. He has delivered comprehensive primary care to patients in Chicago for over three decades, with particular experience managing complex chronic conditions and coordinating specialist care.
Yes, Dr. Hennessy holds board certification in internal medicine. He also serves as an Assistant Professor and Senior Attending physician at Rush University Medical Center.
Dr. Hennessy earned his medical degree at Rush Medical College. He completed both his internship and residency at Rush University Medical Center, where faculty recognized him as Intern of the Year, Resident of the Year, and Attending of the Year.
Yes, both Castle Connolly and Chicago Magazine have named Dr. Hennessy a Top Chicago Doctor. His peers also call him the "Doctor's doctor," reflecting the trust he has earned across Chicago's medical community over more than 30 years.
Dr. Hennessy has served as the Chicago White Sox Team physician since 2004. He also volunteers as Medical Director of Community Health, which operates the largest free clinic in the United States.
Dr. Hennessy sees adult patients across a wide range of primary care needs, including chronic disease management, preventive care, and complex medical coordination. His long-standing specialist relationships make him especially well-suited for patients who require expert consultative care.
Dr. Hennessy is a Fellow of the American College of Physicians and a member of the Chicago Medical Society. He also holds faculty and attending appointments at Rush University Medical Center.
Doctor profile last updated March 21, 2026