Dr. Sean Halligan - Cardiac, Cardiovascular Disease Care and Interventional Cardiology specialist in Sioux Falls, SD
Skip to Content
Alert IconAll South Dakotans, ages 16 and older, are now eligible for the COVID-19 vaccine. Please visit our vaccination resources for more information.
Sean C. Halligan

Sean C. Halligan, MD, FACC, FSCAI

Cardiology, Cardiovascular Disease, and Interventional Cardiology
4.6 / 5 (Based on 155 Ratings) 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


March 08, 2021
Very patient.
March 05, 2021
Okay, when I... my appointment was fine and it was great. But when I checked into the facility to the Heart Hospital itself- the gal that helped me, she registered me under a wrong name. I gave her my name and she went through the file, yes, here it is. And I waited through probably 10 people being called an interviewed doing her paperwork. And I went and asked if I was registered right and I was not. And I sat probably 25 minutes- Just waiting. Yes, very dissatisfied with the check in.
March 05, 2021
This is my 1st visit. I was impressed by Dr. Halligan nurses the tech that did my EKG and Dr. Halligan and I was especially impressed by him. He's very thorough did a lot of teaching showed lot of care. I will definitely recommend him to anyone that needs a Cardiologist. Thank you very much.
February 08, 2021
I don't think the doctor had enough time to study my chart or problems
January 29, 2021
Very prompt, efficient and pleasant...everyone we had contact with. Thank you.
January 08, 2021
We were very satisfied with everything he did. Thank you.
December 07, 2020
Hi, Dr. Halligan was very very thorough. He was very kind and respected my questions when I asked them.
November 24, 2020
This is the most well organized group of folks. The day went like clock work. And being told what the next step would be and what to expect. I was so impressed more so than I was back 7 years ago. Keep up the good work.
November 24, 2020
I think Dr. Halligan is fine. The only recommendation I would have is it would have been good if he had called me with the results. In the event I had questions I didn't I mean everything was fine. The nurse did a good job, but I think it is helpful to be able to speak directly to your doctor. Once you've had a test like that. Thanks.
November 19, 2020
Both my husband and I are very pleased with the Heart Hospital. Dr. Weiss has been a godsend for my husband, and the cardiologist team that I'm seeing, I couldn't be more confident that things are going to go extremely well. Thank you.
October 09, 2020
It was great. They did the EKG first and then when I saw the doctor he had that information, plus all the information and he was very friendly and personable. Thank you.
September 29, 2020
Yes. I thought I had a good experience with the Dr. I felt very comfortable. Not so scared, and I know everyone is wonderfully good. I would recommend the hospital to anyone. Thank you.
September 29, 2020
I think the provider didn't listen to me very well. Just wanted to prescribe a pill for me to try to correct what was going on, and I don't think that was the right path for me, so I will not be taking the medication he prescribed, and I will not see him again. Thank you.
September 23, 2020
Have this doctor ask more questions.
September 15, 2020
Dr. Halligan, was direct honest friendly professional we're very pleased. Thank you.
September 15, 2020
I had a very pleasant experience and everyone was very cordial, and polite, and respectful, and on time, and very swiftly. Everyone answered my questions. So, I appreciated my visit. Thank you.
September 04, 2020
It was a very thorough exam that I had yesterday, and I was very pleased. Thank you.
July 23, 2020
I'm concerned about my medication. They don't seem to be accurate according to the way my bottles prescribed. I don't know how to give you that information that doctor would be able to see.
July 23, 2020
Dr. Halligan did a very good job with me. I appreciated his input and explained everything to me correctly, and I really appreciated it. Thank you.
July 10, 2020
The people that worked with me were friendly, professional, and caring and they seemed to know what they were doing.
June 18, 2020
Everything went well.
June 18, 2020
The staff performing my tests were wonderful to work with. When I was complete - when tests were complete and I got a call about the results and things that needed to have happen it was very short. I didn't under ... it was hard to understand what to - what was recommended, what the courses of action were. It was an incomplete follow up. Limited opportunity to ask questions and I did not talk to my doctor about the results of the test. And so I'm I'm uncertain and uncomfortable with the results and the recommendation because I did not talk directly to the doctor about those results and recommendations and that adequate opportunity to have a face to face conversation about those results.
May 29, 2020
As a first visit and with lot of anxiety out of what we would find out and the reality of it all, my experience was very positive. Right on schedule and very professional. I felt I was in good hands and console.
May 08, 2020
Following my visit, I returned to my home pharmacy which had two prescriptions that I was not prepared to accept because I had not been informed such prescriptions would be supplied for my use. Following two phone calls to north central, I finally spoke to a nurse who told me not to take the two prescriptions; that they were not meant for me. I was confused with this and I remained confused. I did not take the scripts. This is not a good situation to find oneself involved.

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.

Non-Avera web sites (e.g., Facebook, Twitter, etc.) linked to from this Web page, including any blogs or other personal, networking or social media Web sites, are not affiliated with, nor endorsed by any Avera facility. Opinions, views, and comments posted on these Web sites are not Avera's.  Avera assumes no legal liability or responsibility for the accuracy, completeness, or usefulness of any information, product, or process disclosed on these sites. The opinions of those posting comments, views or opinions on these sites do not necessarily state or reflect those of Avera and shall not be used for advertising or product endorsement purposes.

Live Better. Live Balanced. Avera.

Avera is a health ministry rooted in the Gospel. Our mission is to make a positive impact in the lives and health of persons and communities by providing quality services guided by Christian values.

© 2021 Avera Health, Sioux Falls, SD. All Rights Reserved.