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Dr. John Grehan, MD

Dr. John Grehan, MD

Cardiothoracic Surgery*
25+ years of experience

Dr. John Grehan, MD is a cardiothoracic surgeon in Sioux Falls, SD and has over 25 years of experience in the medical field. He graduated from University of Minnesota Medical School in 1995. He is affiliated with United Hospital. He is accepting new patients.

4.9 Star Rating
Based on 84 reviews 4.9 Star Rating (84 reviews)

Practice

1301 W 18th St Sioux Falls, SD 57105

Make an Appointment

(605) 312-2100

At a Glance

  • Areas of Expertise
    Dr. Grehan specializes in the areas of Cardiovascular Surgery, General Surgery, Thoracic Cardiovascular Surgery & Thoracic Surgery. • See board certifications
  • Explains Conditions Well
    Patients said this doctor explains conditions well. • See reviews
  • Practices at Top Hospital
    Patient Safety Excellence Award™ • See hospitals
  • Good Patient Care
    Patients said they had exceptional care at this hospital. • See hospitals
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Dr. Grehan's Reviews

Likelihood to recommend Dr. Grehan

4.9

84 ratings, 40 with a written review
5 Star
95%
95%
4 Star
1%
1%
3 Star
0%
0%
2 Star
1%
1%
1 Star
2%
2%

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RecentHighestLowestMost Helpful
What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Michael Ferguson – Oct 27, 2021
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What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Bernie Doll – Sep 02, 2021
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What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
What could be improved
No results
Helpful
Mark Maxwell – Jul 13, 2021
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
  • Long wait times
Helpful
On the Button – Jun 13, 2021
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Bob – Mar 05, 2021
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Suzy N. – Feb 12, 2021
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Marvin Broin – May 13, 2020
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
G. K. in Oakdale, MN – Feb 21, 2020
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 people found this helpful
Helpful
Don sherry – Oct 31, 2019
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Keith in St Paul, – Jun 23, 2019
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Roger C in St. Paul, MN – Jun 11, 2019
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What went well
No results
What could be improved
No results
Helpful
May 30, 2019
×Post a ResponseAre you Dr. John Grehan, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Hager city – Jan 22, 2019
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 people found this helpful
Helpful
Jarrod Davis in St. Paul, MN – Jan 10, 2019
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Dave Schmitt in Hastings, MN – Nov 09, 2018
×Post a ResponseAre you Dr. John Grehan, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
John B in White Bear Lake, MN – Oct 11, 2018
×Post a ResponseAre you Dr. John Grehan, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Jerry Willenbrin in Hastings, MN – Sep 01, 2018
×Post a ResponseAre you Dr. John Grehan, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Steve Lentsch in Vadnais Heights, MN – Jul 17, 2018
×Post a ResponseAre you Dr. John Grehan, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
ELLA WILSEY in Saint Paul – Mar 29, 2018
×Post a ResponseAre you Dr. John Grehan, MD?
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
John Grape in St Paul, MN – Mar 22, 2018
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Leave a review

How was your experience with Dr. Grehan?

Know Before You Go

About Me

biography

Dr. John Grehan, MD is a cardiothoracic surgeon in Sioux Falls, SD and has over 25 years of experience in the medical field. He graduated from University of Minnesota Medical School in 1995. He is affiliated with United Hospital. He is accepting new patients.

  • Cardiothoracic Surgery

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • University Michigan Health System

    Fellowship Hospital, 2006

  • Fairview University Medical Center

    Residency Hospital, 2004

  • Fairview University Medical Center

    Internship Hospital, 1996

  • University Of Minnesota Medical School

    Medical School, 1995
American Board of Medical Specialties®
American Board of Medical Specialties
- 
Cardiovascular Surgery†
American Board of Thoracic Surgery
- 
Thoracic Cardiovascular Surgery
- 
Thoracic Surgery†
Royal College of Physicians and Surgeons of Canada®
Royal College of Physicians and Surgeons of Canada
- 
General Surgery†
†Self designated 
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

Learn more about medical license public record check

  • Hospital Outstanding Patient Experience (H.O.P.E.) Award-AllinaHealth, April 2012

  • Americas Top Surgeons-Consumers' Research Council of America, 2012

  • Hospital Outstanding Patient Experience (H.O.P.E.) Award-AllinaHealth, June 2011

Focus on ATTR-CM

Locations

Practice

Unavail1301 W 18th St Sioux Falls, SD 57105
1

Practice

St. Paul Cardiovascular Surgical Services225 Smith Ave N Ste 400 Saint Paul, MN 55102
2
Select Specialty Hospital-Sioux Falls1305 W 18th St Sioux Falls, SD 57105
3

Affiliated Hospitals

  • United Hospital

    333 Smith Ave N
    Saint Paul, MN 55102
    Recipient of 10
    hospital awards

    Patient Safety Excellence Award™ (2025)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    Surgical Care Excellence Award™ (2024)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    87%
    Patients said they were given information about recovering at home

    3% higher than the national average

    79%
    Patients said that doctors always listened to them and explained things well

    3% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality