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Dr. John Granquist, MD

Dr. John Granquist, MD

Cardiology*
20+ years of experience

Dr. John Granquist, MD is a cardiologist in Hartford, CT and has over 20 years of experience in the medical field. Dr. Granquist has extensive experience in Adult Congenital Heart Conditions. He graduated from Tufts University School of Medicine in 2000. He is affiliated with medical facilities such as Hartford Hospital and Middlesex Hospital. He is accepting new patients and telehealth appointments.

5 Star Rating
Based on 138 reviews 5 Star Rating (138 reviews)

Practice

85 Seymour St Ste 719 Hartford, CT 06106
Telehealth available
(860) 525-1532

Hospital Highlight

Dr. Granquist is affiliated with Middlesex Hospital Middletown, a highly rated hospital.

Dr. Granquist is a Healthgrades Choice provider in Cardiology

The Healthgrades Choice designation helps you understand the most important factors to consider when choosing a healthcare professional. This designation is earned based on four set standards.
Read our methodology

  • Above average experience
  • Good hospital quality
  • Good patient ratings
  • No healthcare sanctions
  • Areas of Expertise
    Dr. Granquist specializes in the areas of Advanced Heart Failure and Transplant Cardiology, Advanced Heart Failure and Transplant Cardiology, Cardiovascular Disease, Cardiovascular Disease, Internal Medicine & Internal Medicine. • See board certifications
  • Explains Conditions Well
    Patients said this doctor explains conditions well. • See reviews
  • Offers Telehealth
    This doctor offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    America’s 50 Best Hospitals for Cardiac Surgery Award™ • See hospitals
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Dr. Granquist's Reviews

Likelihood to recommend Dr. Granquist

5.0

138 ratings, 108 with a written review
5 Star
100%
100%
4 Star
0%
0%
3 Star
0%
0%
2 Star
0%
0%
1 Star
0%
0%

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All reviews are confirmed and audited before publication, and community members have the ability to flag inappropriate content for further review by our team.

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Any reviews that are deemed fraudulent or violate our guidelines will be removed immediately.

RecentHighestLowestMost Helpful
What went well
  • I felt respected
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
  • Difficult to schedule appointment
Helpful
Mar 30, 2025
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What went well
  • I felt respected
  • 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
Diane Yacovone Aurigemma – Feb 08, 2025
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What went well
  • I felt respected
  • 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
Robert Gange – Jan 18, 2025
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What went well
  • I felt respected
  • 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
Jan 11, 2025
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Ann Petkovich – Nov 29, 2024
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What went well
  • I felt respected
  • 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
Thomas Hegy – Nov 21, 2024
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What went well
  • I felt respected
  • 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
Nov 06, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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 J Mazzucchi – Nov 01, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Aug 31, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Jul 02, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Benjamin Cochran – Jun 28, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Tom Gilmartin – Apr 05, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Mar 08, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Coulombe – Feb 20, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Pat – Feb 14, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Jan 22, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Jan 07, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Jan 04, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Jenny Mantel – Jan 04, 2024
×Post a ResponseAre you Dr. John Granquist, MD?
What went well
  • I felt respected
  • 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
Christine Miarecki – Dec 01, 2023
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Leave a review

How was your experience with Dr. Granquist?

Know Before You Go

About Me

biography

Dr. John Granquist, MD is a cardiologist in Hartford, CT and has over 20 years of experience in the medical field. Dr. Granquist has extensive experience in Adult Congenital Heart Conditions. He graduated from Tufts University School of Medicine...read more

  • Cardiology

  • Internal Medicine

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

  • Tufts New England Medical Center

    Fellowship Hospital

  • Tufts University School Of Medicine

    Medical School, 2000
National Board of Physicians and Surgeons®
National Board of Physicians and Surgeons®
- 
Advanced Heart Failure and Transplant Cardiology
- 
Cardiovascular Disease
- 
Internal Medicine
American Board of Medical Specialties®
American Board of Internal Medicine®
- 
Advanced Heart Failure and Transplant Cardiology
- 
Cardiovascular Disease
- 
Internal Medicine
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

Dr. Granquist is a Healthgrades Choice provider in Cardiology

    Read our methodology

    Focus on ATTR-CM

    Locations

    Practice

    Consulting Cardiologists PC85 Seymour St Ste 719 Hartford, CT 06106
    1
    • Call
    • Fax
    • Hours
      • Mon: 9:00am - 5:00pm
      • Tue: 9:00am - 5:00pm
      • Wed: 9:00am - 5:00pm
      • Thu: 9:00am - 5:00pm
      • Fri: 9:00am - 5:00pm
      • Sat: closed
      • Sun: closed
    • Directions
    Day Hill Dental PLLC1060 Day Hill Rd Windsor, CT 06095
    2
    • Call
    • Fax
    • Hours
      • Mon: closed
      • Tue: 9:00am - 5:00pm
      • Wed: closed
      • Thu: closed
      • Fri: closed
      • Sat: closed
      • Sun: closed
    • Directions

    Practice

    Office433 S Main St Ste 109 West Hartford, CT 06110
    3
    • Call
    • Fax
    • Hours
      • Mon: 9:00am - 5:00pm
      • Tue: 9:00am - 5:00pm
      • Wed: 9:00am - 5:00pm
      • Thu: 9:00am - 5:00pm
      • Fri: 9:00am - 5:00pm
      • Sat: closed
      • Sun: closed
    • Directions
    Office305 Western Blvd Ste 100 Glastonbury, CT 06033
    4
    • Call
    • Fax
    • Hours
      • Mon: 9:00am - 5:00pm
      • Tue: 9:00am - 5:00pm
      • Wed: 9:00am - 5:00pm
      • Thu: 9:00am - 5:00pm
      • Fri: 9:00am - 5:00pm
      • Sat: closed
      • Sun: closed
    • Directions

    Affiliated Hospitals

    • Middlesex Hospital

      28 Crescent St
      Middletown, CT 06457
      Recipient of 15
      hospital awards

      America's 100 Best Hospitals Award™ (2023)

      Top 5% in the nation for consistently delivering clinical quality

      America's 250 Best Hospitals Award™ (2023)

      Top 5% in the nation for consistently delivering clinical quality

      View all awards

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

      89%
      Patients said they were given information about recovering at home

      5% higher than the national average

      80%
      Patients said that doctors always listened to them and explained things well

      4% higher than the national average

      View all patient feedback

    • Hartford Hospital

      80 Seymour St
      Hartford, CT 06102
      Recipient of 29
      hospital awards

      America’s 50 Best Hospitals for Cardiac Surgery Award™ (2025, 2024, 2023)

      Top 5% in the nation for consistently delivering clinical quality

      America’s 100 Best Hospitals for Cardiac Care Award™ (2025, 2024, 2023)

      Top 5% in the nation for consistently delivering clinical quality

      View all awards

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

      89%
      Patients said they were given information about recovering at home

      5% higher than the national average

      76%
      Patients said that doctors always listened to them and explained things well
      View all patient feedback

    • Manchester Memorial Hospital

      71 Haynes St
      Manchester, CT 06040
      Recipient of 3
      hospital awards

      Patient Safety Excellence Award™ (2024, 2023)

      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.

      85%
      Patients said they were given information about recovering at home

      1% higher than the national average

      75%
      Patients said their room and bathroom were always kept clean

      8% higher than the national average

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