Dr. John Granquist, MD

Dr. John Granquist, MD

Cardiology  |  
Male  |  
Age 49
(80)
Telehealth services available
Save
Dr. John Granquist, MD is a cardiology specialist in Hartford, CT and has been practicing for 22 years. He graduated from Tufts University School Of Medicine in 2000 and specializes in cardiology.

85 Seymour St Ste 719

Hartford, CT 6106

Contact Information

(860) 522-0604

Insurance Accepted

  • Aetna
  • Anthem
  • Blue Cross Blue Shield
  • CareFirst Blue Cross Blue Shield
  • Cigna
  • EmblemHealth
  • First Health (Coventry Health Care)
  • Harvard Pilgrim Health Care
  • Humana
  • 4 More

*Please verify this information when scheduling an appointment.

Background Check

No malpractice claims found for Connecticut
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Insurance Check

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Dr. Granquist accepts

Accepted insurance can change. Please double-check when making an appointment.

(860) 522-0604

Dr. Granquist accepts the following insurance:

Aetna
Aetna HMO
Choice Plus POS II
Choice PPO
Select
Anthem
Access Blue New England Network-CT
Balanced Pathway Tiered-CT PPO
Balanced Pathway-CT HMO
Balanced Pathway-CT PPO
Blue New England Network-CT HMO
BlueCare Health Plan (with Expanded Network - Tiered)-CT
BlueCare Health Plan (with Expanded Network)-CT
BlueCare Select (Tiered - Charter)-CT
BlueCare Select (Tiered - Elm)-CT
BlueChoice New England Network-CT
Bronze Pathway X Enhanced Tiered-CT HMO
Bronze Pathway X w/HSA-CT HMO
Bronze Pathway X w/HSA-CT PPO
Bronze Pathway X-CT PPO
Bronze Standard Pathway X for HSA-CT PPO
Bronze Standard Pathway X-CT PPO
Catastrophic Pathway X Enhanced-CT HMO
Century Preferred (Tiered)-CT
Century Preferred Select (Tiered - Charter)-CT
Century Preferred Select (Tiered - Elm)-CT
Century Preferred Tiered (Select Network)-CT
Century Preferred-CT
Choice BlueCare-CT HMO
Choice Century Preferred Basic-CT PPO
City of New Haven - BlueCard-CT
City of New Haven - Century Preferred-CT
CT Children's Medical Center - Tiered-CT PPO
Day Kimball Tiered-CT PPO
Gold Pathway X Enhanced Tiered-CT HMO
Gold Pathway X-CT HMO
Gold Pathway X-CT PPO
Gold Standard Pathway X-CT PPO
National (BlueCard Basic) PPO
National (BlueCard) PPO
Pathway CT (Small Grp)-CT HMO
Pathway CT (Small Grp)-CT PPO
Pathway CT Tiered (Small Grp)-CT PPO
Pathway Enhanced (Ind)-CT HMO
Pathway Enhanced Tiered (Ind)-CT HMO
Pathway X (Ind)-CT PPO
Pathway X (Small Grp)-CT HMO
Pathway X (Small Grp)-CT PPO
Pathway X Enhanced (Ind -)-CT HMO
Pathway X Enhanced Tiered (Ind)-CT HMO
Platinum Pathway X-CT PPO
Silver Pathway X Tiered-CT PPO
Silver Pathway X w/HSA-CT HMO
Silver Pathway X w/HSA-CT PPO
Silver Pathway X-CT PPO
Silver Standard Coinsurance Pathway X-CT PPO
Silver Standard Pathway X-CT PPO
State BlueCare (Local Network only)-CT
State BlueCare (with Expanded Network - Tiered)-CT
State BlueCare (with Expanded Network)-CT
State Preferred (Tiered)-CT
State Preferred-CT
USA-CT PPO
Yale New Haven Health System - Tiered-CT PPO
Blue Cross Blue Shield
Blue Card PPO
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
Cigna
Cigna HMO
Cigna PPO
Great West Healthcare-Cigna PPO
Open Access
Open Access Plus
EmblemHealth
GHI PPO
First Health (Coventry Health Care)
First Health (Coventry Health Care) PPO
Harvard Pilgrim Health Care
Harvard Pilgrim Health Care PPO
Humana
Choice Care PPO
Medicaid
MultiPlan
MultiPlan PPO
PHCS Network PPO
Oxford Health Plans
Freedom Plan
UnitedHealthCare
Choice Plus POS
Options PPO
Oxford Liberty
United Healthcare

Experience Check

Check Dr. Granquist's experience treating your condition or procedure

Dr. Granquist's Top Procedures and Conditions

Treatment Frequency
Electrocardiogram (EKG)
very high
very high

Treatment Frequency

Dr. Granquist performs Electrocardiogram (EKG) more than 100% of his peers

Dr. Granquist performs this procedure more than 100% of his peers

Heart Disease
very high
very high

Treatment Frequency

Dr. Granquist treats Heart Disease more than 98% of his peers

Dr. Granquist treats this condition more than 98% of his peers

Cardiomyopathy, Hypertrophic
very high
very high

Treatment Frequency

Dr. Granquist treats Cardiomyopathy, Hypertrophic more than 97% of his peers

Dr. Granquist treats this condition more than 97% of his peers

Dr. Granquist's conditions and procedures:

  • Aneurysm and Dissection of Heart
  • Angina
  • Angina and Acute Coronary Syndrome
  • Aortic Aneurysm
  • Aortic Dissection
  • Aortic Ectasia
  • Aortic Embolism and Thrombosis
  • Aortic Stenosis
  • Aortic Valve Disease
  • Aortic Valve Regurgitation
  • Arrhythmia Screening
  • Arrhythmias
  • Atrial Fibrillation
  • Atrial Flutter
  • Atrial Septal Defect
  • Cardiac Arrest
  • Cardiac Imaging
  • Cardiac MRI (Magnetic Resonance Imaging) of Heart or Chest
  • Cardiac Myocardial Perfusion Imaging
  • Cardiac Tamponade
  • Cardiomegaly
  • Cardiomyopathy
  • Cardiomyopathy, Dilated
  • Cardiomyopathy, Hypertrophic
  • Cardiovascular Diagnostic Test
  • Cardiovascular Stress Test
  • Cardioversion, Elective
  • Carotid Artery Disease
  • Chest Pain
  • Chest Pain Evaluation
  • Cholesterol Screening
  • Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
  • Congenital Aortic Valve Disorders
  • Congenital Heart Defects
  • Congenital Heart Disease
  • Congestive Heart Failure
  • Coronary Angiogram
  • Coronary Artery Disease (CAD)
  • Coronary Artery Dissection
  • Dobutamine Thallium Stress Test
  • Echocardiography
  • Electrocardiogram (EKG)
  • Endocarditis
  • First Degree Heart Block
  • Heart Attack (Acute Myocardial Infarction)
  • Heart Disease
  • Heart Murmur
  • Heart Palpitations
  • HeartAware Online Risk Screening
  • High-Risk Hypertension
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Chronic Kidney Disease
  • Hypertensive Encephalopathy
  • Hypertensive Heart and Chronic Kidney Disease
  • Hypertensive Heart Disease
  • Hypotension
  • Insertion of Left Ventricular Lead for Pacemaker or Cardioverter and-or Defibrillator
  • Limb Swelling Caused by Fluid Overload
  • Long QT Syndrome
  • Mitral Valve Disease
  • Mitral Valve Prolapse
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Mobitz, Type 2, Heart Block
  • Nuclear Stress Testing
  • Patent Foramen Ovale (PFO)
  • Pericardial Disease
  • Pericarditis
  • Peripheral Arterial Disease Screening (PAD)
  • Pharmacologic Nuclear Stress Test
  • Pharmacologic Stress Test, Adenosine
  • Primary Pulmonary Hypertension
  • Pulmonary Disease
  • Pulmonary Hypertension
  • Pulmonary Venous Return Anomaly
  • Reflex Sympathetic Dystrophy
  • Second Degree Heart Block
  • Septal Defect
  • Sick Sinus Syndrome
  • Sinus Bradycardia
  • Sinus Tachycardia
  • Stress Test
  • Structural Heart Disease Evaluations and Treatment
  • Supraventricular Tachycardia
  • Syncope
  • Takayasu's Arteritis
  • TCD Bubble Test
  • Third Degree Heart Block
  • Thrombosis
  • Tilt Table Testing
  • Treadmill Stress Test
  • Tricuspid Valve Disease
  • Unstable Angina
  • Vascular Disease
  • Ventricular Fibrillation
  • Ventricular Septal Defect
  • Ventricular Tachycardia (VT)
  • Wolff-Parkinson-White Pattern

About Me

Biography

Dr. John Granquist, MD is a cardiology specialist in Hartford, CT and has been practicing for 22 years. He graduated from Tufts University School Of Medicine in 2000 and specializes in cardiology.

Specialties

  • Cardiology

Board Certifications

  • Advanced Heart Failure and Transplant Cardiology
  • Internal Medicine

Education

Tufts New England Medical Center
Fellowship Hospital
2000
Tufts University School Of Medicine
Medical School

Awards

Frequently Asked Questions

Does Dr. John Granquist, MD offer telehealth services?

Dr. Granquist has indicated that they offer telehealth. Contact the office to check for eligibility for your needs.

Is Dr. John Granquist, MD accepting new patients?

Dr. John Granquist, MD generally accepts new patients on Healthgrades. You can see Dr. Granquist's profile to make an appointment.

Does Dr. John Granquist, MD accept my insurance?

Use the Healthgrades insurance check to verify if Dr. Granquist accepts your insurance.

What are Dr. John Granquist, MD's top areas of care?

Dr. Granquist frequently treats Electrocardiogram (EKG), Heart Disease, and Cardiomyopathy, Hypertrophic. See all procedures and conditions Dr. Granquist treats.

Where is Dr. John Granquist, MD's office located?

Dr. Granquist's office is located at 85 Seymour St Ste 719, Hartford, CT 6106. Find other locations and directions on Healthgrades.

How can I make an appointment with Dr. John Granquist, MD?

Find contact information here to make an appointment.

Dr. Granquist's Reviews

Likelihood to recommend Dr. Granquist

5.0

Based on 80 ratings

5 Stars
100%
(80)
4 Stars
0%
(0)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
0%
(0)
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Dr. Granquist
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RecentHighestLowestMost Helpful
Reply
In my opinion, Dr. Grandquist is an excellent Cardiologist. He is knowledgeable and thorough and knew exactly what tests I needed to confirm that I had a problem with my Aortic Valve. I would strongly recommend Dr. Grandquist to any family or friends.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Vincent Lanzi – Jan 17, 2022
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Reply
Very professional, caring and absolutely wonderful!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Nov 04, 2021
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Reply
Absolutely wonderful. From check in to check out. Dr Grandquist has the best. "bedside" manner & is very knowledgeable.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Katherine Stoker – Oct 12, 2021
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Reply
Couldn’t be happier with Dr Granquist and the care he provides. Takes time to listen and answer all questions. Appointment is never rushed. Highly recommended!!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Eugene M. – Oct 08, 2021
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Reply
Very pleased with both Dr Granquist and the office staff. Dr Granquist has a pleasant demeanor and takes time to relate to the patient. I felt that I received excellent care
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Oct 03, 2021
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Reply
On time and Dr. answered all my questions
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Matt Stein – Aug 28, 2021
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Reply
Dr Granquist was covering for my regular doctor. He gave me all the important data I needed to make a qualified decision regarding my care. Highly recommend.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Aug 27, 2021
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Reply
Dr. Grandquist is the epitome of a brilliant physician. Would never hesitate to recommend this compassionate doctor!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Diane S. – Aug 17, 2021
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Reply
Dr. Granquist is a caring individual, who listens to his patients and provides professional solutions. He assesses whether certain tests are called for and when they are not. I find him to be very attentive.
What went well
  • Staff friendliness
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
  • Appointment was rushed
Helpful
Aug 16, 2021
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Reply
My first visit. Dr. Granquist was knowledgeable, courteous, friendly, and made sure details were understood. He took the time to listen to and answer all my questions without being rushed. Made me feel at ease.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Aug 13, 2021
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Reply
dr. grandquist is the dr. for me. his ability to listen is second to none. he patiently listens to all my concerns and addresses them individually. he makes me feel comfortable enough to be able to talk to him as a "person".
What went well
  • Appointment wasn't rushed
  • Listened & answered questions
What could be improved
No results
Helpful
Jul 31, 2021
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Reply
I saw Dr. Granquist for the first time. Dr. Granquist was very attentive to my concerns and seemed to genuinely want to resolve my health issues! I highly recommend Dr. Granquist as a compassionate and skilled cardiologist to any patient in need of cardiology care!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Jul 26, 2021
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Reply
Dr. Grandquist and his staff are kind, attentive and caring. They're a great team.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Harriet Bronson – Jul 03, 2021
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Reply
The professionalism of Dr Granquist and his PCA is a 10! His ability to listen to patient, assess quickly and provide resolution is a true skill! Much appreciated! Receptionist staff so-so, not too professional.
What went well
  • Wait times
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
St John – Jun 04, 2021
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Reply
My visit was excellent Dr Grandquist and his staff are exceptional they provide great help and care l highly commend Dr Grandquist and his staff thank you !!!!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Rocco Perugini – May 29, 2021
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Reply
Very knowledgeable as well comforting for me as a patient.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
Jerry – May 28, 2021
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Reply
Dr. Granquist was phenomenal! He was on time, answered all of my questions, and really took the time to get to know me personally. I was truly nervous going into my appointment, but I left feeling less anxious and confident that I picked the right cardiologist to see!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
1 person found this helpful
Helpful
May 07, 2021
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Reply
I have been a patient of Dr. Granquist’s for about 5 yrs., and in all regards he has been superior: considerate, knowledgeable, attentive, and medically sharp. I sought him and have never been dissatisfied.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Peter DeLisa – Mar 05, 2021
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Reply
Dr. Grandquist is fantastic. He makes you feel at ease during your appointment; listens to your concerns, recommends remedies ...professional and knowledgeable. Call him to book an appointment. You’ll be happy.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Joe Pal – Mar 01, 2021
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Reply
Dr.Granquist was exceptional. What a pleasure to meet a doctor who actually takes the time to listen and get to know you. Clinically outstanding as well.
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Dora Harris – Feb 16, 2021
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Locations

Consulting Cardiologists

Consulting Cardiologists85 Seymour St Ste 719 Hartford, CT 6106
1
Consulting Cardiologists1060 Day Hill Rd # Ct Windsor, CT 6095
2
  • Call
  • Fax
  • Hours
    • Mon: closed
    • Tue: 9:00am - 5:00pm
    • Wed: closed
    • Thu: closed
    • Fri: closed
    • Sat: closed
    • Sun: closed
  • Directions
Consulting Cardiologists74 Mack St Windsor, CT 6095
3
  • Call
  • Fax
  • Hours
    • Mon: 9:00am - 5:00pm
    • Tue: 9:00am - 5:00pm
    • Wed: closed
    • Thu: closed
    • Fri: closed
    • Sat: closed
    • Sun: closed
  • Directions

Affiliated Hospitals

Dr. Granquist is affiliated with the following hospitals. Select a hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

Hartford Hospital

Hartford, CT

72% Patient experience rating, 3% higher than the national average

12 Awards Received

Manchester Memorial Hospital

Manchester, CT

58% Patient experience rating, 11% lower than the national average

Middlesex Hospital

Middletown, CT

77% Patient experience rating, 8% higher than the national average

17 Awards Received