Skip to Content
 
 
 
 
Sean C. Halligan

Sean C. Halligan, MD, FACC, FSCAI

Cardiology, Cardiovascular Disease, and Interventional Cardiology
4.7 / 5 (Based on 478 Ratings) Learn More

Office Information

Experience

Education

University of Nebraska College of Medicine, Omaha, Medical School

Residency

Mayo Clinic, Rochester, MN, Internal Medicine

Fellowship

Mayo Clinic, Rochester, MN, Cardiology

Professional Memberships

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

Certifications

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

Reviews

April 05, 2019
Every worker worked well like a well oiled machine. We were pleased with how quickly and efficiently are time was there.
April 02, 2019
Hi. I guess the only thing I have to say is Dr. Sean Halligan was supposed to call me back, but some test results by today, and he hasn't done that yet. Okay. Thank you. Bye. Bye.
April 01, 2019
Everyone I met was professional and the nurses in the hospital were great.
March 22, 2019
I appreciate everything being on time and prompt as schedule.
March 21, 2019
Yes, I just like to say that everything was very thorough. I was in and out very quickly in a very timely manner. I had a couple of forms to fill out and I didn't even have a chance to fill them out and I was back in the office, and I don't know if they're just a slow day or you're very quick there. But thank you very much.
March 20, 2019
I just want to express my gratitude to everyone that I had in contact with. Everyone was nice. I've never been to a doctor's office where they were actually on time or in some cases ahead of time. Everything went so smoothly. I was just extremely impressed with the entire staff. Thank you.
March 04, 2019
All the staff were friendly and professional
January 30, 2019
Very very clean establishment, very very efficient, very professional nurses. I would recommend you hospital to anyone. Thank you very much.
January 08, 2019
It's gonna be hard to improve on the program you're running over there, but, I guess, you know, you're always looking for improvement and I wouldn't have any idea what to tell you, outside the fact everybody that has seen me on that day was, you know, very cordial, very professional. So, what more could you ask for. With that thought, thank you.
January 08, 2019
Yeah, I enjoyed meeting the doctor and nurses the nurse was quite withdrawn. I thought and quiet to begin with I'd appreciate a little bit more inclusion in the conversation from her but perhaps it's or style. I was impressed with the doctor. I met him for the first time and I will return as far as as as the time goes today and everything. So I'm I'm an old person and I appreciate the attention and expertise that I received and also this matter was very well. And I appreciate everybody's input that I received. Thank you.
December 18, 2018
It was a pleasant experience during a scary time
December 18, 2018
Don't know how I can say this. They did a good job people that did tests, etc. did great. It just seems quick, you know what, but I guess that is just the necessity of it. The little time with the doctor seemed less than five minutes, etc, maybe 10 minutes. Just kind of very quick, very weird, I know it's busy, but I'm just I'm not sure if that's standard or not. Thanks. Bye.
December 14, 2018
The staff person who did my initial testing needs an attitude adjustment. Demeanor was not welcoming at all. Didn't seem like she liked her job at all.
December 14, 2018
Love Dr. Halligan. He is kind and respectful and intelligent. I feel like my health is in the best of hands.
December 11, 2018
Nice personal, not a long wait time , nice facility
December 06, 2018
Pleasant and little waiting time.
December 06, 2018
Yes, I had a very good appointment with doctor, but I felt that I wasn't quite in my frame of mind wasn't very good, and I'm not really in medical educated, but I almost would like to have another session like that. Maybe if I write down some questions, I would ask him a little bit more, but he seemed very enthusiastic. I liked him, and I think, I hope that what you do for me will help me, and I hope it will help you folks. And Jesus be with us all, and thank you.
December 04, 2018
I really appreciated how quickly & efficiently my appointment moved along.
November 09, 2018
My doctor Sean explained things very very well and thorough and he's helped me a great deal in understanding what's going on with my heart. And and I really appreciate that. Thank you.
October 01, 2018
Good doctor
September 28, 2018
Very professional and friendly staff.
September 18, 2018
Thank You Dr Halligan
September 17, 2018
He is ok
August 27, 2018
The staff were friendly, the Dr was informative.
August 23, 2018
Very professional
August 23, 2018
Excellant experience from the help desk to the techs, nurses and doctor. Would definitely recommend.
August 02, 2018
I had a positive experience
August 01, 2018
From word of mouth and my experience they are the best in the area.
July 31, 2018
I don't want to share my disappointment with others. This may have been an exception. I am sure Dr. Halligan is a fine doctor and is invaluable in treating heart patients.
June 28, 2018
A definite recommendation.
May 03, 2018
I liked Dr Halligan immediately. He had a warm, outgoing personality, a firm handshake, and seemed to know his business. If he’s going to mess with my heart, I hope he knows what he’s doing.
April 24, 2018
Great sevice
April 23, 2018
Highly recommended
April 20, 2018
After my visit with Dr Halligan I felt assured and confident. I am better prepared to undergo the procedure to repair my CTO.
March 22, 2018
That my provider was professional and the process was not difficult.
February 22, 2018
Don't see this doctor.

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.

© 2019 Avera, Sioux Falls, SD. All Rights Reserved.