Sean C. Halligan

Sean C. Halligan, MD, FACC, FSCAI

Cardiology, Cardiovascular Disease, and Interventional Cardiology
4.6 / 5 (Based on 123 Ratings) Read Reviews | Learn More

Office Information



University of Nebraska College of Medicine, Omaha, Medical School


Mayo Clinic, Rochester, MN, Internal Medicine


Mayo Clinic, Rochester, MN, Cardiology

Professional Memberships

Fellow, American College of Cardiology; Fellow, Society for Cardiac Angiography and Interventions


American Board of Internal Medicine; Board of Cardiovascular Computed Tomography; Subspecialty in Cardiovascular Disease; Subspecialty in Interventional Cardiology


August 16, 2022
All of the...all of the staff was extremely courteous, professional, and kind. They seemed very receptive to what we were saying. And even though we were early, we were fitted in well to their schedule, and we very much appreciated that.
June 22, 2022
Positive experience.
June 07, 2022
I like doctor. The doctor very well and he was a tentative and he answered my questions and he acted like he would like to take me as a patient and he felt that he just acted like he cared and I thought Dr. Halligan was very pleasant and I am looking forward to having him as my Cardiology provider. Thank you. Bye bye.
May 24, 2022
Staff was very friendly and provided good accurate service in great timing.
April 22, 2022
Dr. was very easy to relate to.
April 22, 2022
Doctor explained my problem in layman terms, which was very helpful to me.
April 13, 2022
Overall the experience was really good. My doctor is very, very knowledgeable. The only thing maybe is sometimes is the physician's need to remember, not that they're not busy, but they need to realize that many of the patients. Most of us it 's our first time encountering this type of situation. So, making sure that we're at ease and understanding everything is a really a big plus. For these doctors to do this every day. It's probably a little more calm and comfort for them. But for us as a being a patient, it's important that they realize it's a bit overwhelming. We don't know a lot about the situation we're in. But otherwise I was very happy with the whole process in general.
April 13, 2022
I was very satisfied
April 08, 2022
Dr. Halligan is very well qualified for what he's doing. He's a super super doctor or cardiologist. Thank you.
March 14, 2022
Everyone was very compassionate to me with my recent loss of my pet.
March 04, 2022
Professional service!
March 04, 2022
highly efficient and friendly staff
February 01, 2022
Very positive experience.
January 31, 2022
I had an ultrasound added and the staff was able to find a slot for me that day and also schedule my angiogram 4 days after my first appointment. my spouse is dealing with a new cancer diagnosis, so getting my issues resolved in a timely fashion is a great help to us....THANK YOU

This directory contains information about the provider members of Independent Health Care Associates, Avera Health and all Avera entities, members of the Avera Medical Group, and employed select providers with Avera McKennan, Sioux Falls, SD and Avera Marshall, Marshall, MN and physicians with hospital privileges at Avera St. Luke's, Aberdeen, SD; Avera Sacred Heart, Yankton, SD; Avera Queen of Peace, Mitchell, SD; Avera St. Mary's, Pierre, SD.

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