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Dr. John Grehan, MD

Cardiothoracic Surgery* Age 56
Dr. John Grehan, MD
4.9 (84 Ratings)
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Dr. John Grehan, MD is a Cardiothoracic Surgery Specialist in Saint Paul, MN.
Dr. John Grehan, MD
4.9 (84 Ratings)
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Dr. John Grehan, MD

Cardiothoracic Surgery* Age 56
Saint Paul, MN
Accepting new patients
29 years of experience
Dr. John Grehan, MD is a Cardiothoracic Surgery Specialist in Saint Paul, MN.

About

Dr. John Grehan, MD is a Cardiothoracic Surgery Specialist in Saint Paul, MN and has 29 years experience. They graduated from University of Minnesota Medical School in 1995 and completed a residency at Fairview University Medical Center.They currently practice at United Heart Vascular Clinic and are affiliated with United Hospital. At present, Dr. Grehan received an average rating of 4.9/5 from patients and has been reviewed 84 times. Their office accepts new patients. Dr. Grehan is board certified in Cardiovascular Surgery and accepts multiple insurance plans.

Explains Conditions Well

Patients said this doctor explains conditions well.

Trustworthy

Patients said this doctor is trustworthy.

Low Wait Times

Patients are usually seen in 10 minutes or less.

Friendly Staff

Patients said the staff was friendly.

Easy Scheduling

Patients said scheduling was easy.

Compare with other Cardiothoracic Surgery Specialists

Compare Dr. Grehan with our nearby Cardiothoracic Surgery Specialists at North Memorial Health Hospital
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Dr. Joseph Van Camp, MD
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Dr. Mark Solfelt, MD
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Dr. Robert King, MD
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Learn More
These providers are on the medical staff of North Memorial Health Hospital
These providers are on the medical staff of North Memorial Health Hospital.
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Experience Check

Enter a condition or procedure
Valve Repair or Replacement (Aortic, Mitral, Tricuspid, and Pulmonary)
Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
Coronary Artery Bypass with Robotic Assist
Valve Repair or Replacement (Aortic, Mitral, Tricuspid, and Pulmonary)
Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
Coronary Artery Bypass with Robotic Assist
Valve Repair or Replacement (Aortic, Mitral, Tricuspid, and Pulmonary)
Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
Coronary Artery Bypass with Robotic Assist
Aortic Valve Disease
Aortic Valve Regurgitation
Atrial Fibrillation
Congenital Heart Defects
Coronary Artery Disease (CAD)
Mitral Valve Disease
Mitral Valve Regurgitation
Aortic Valve Surgery
Maze Procedure
Mitral Valve Surgery
Acute Coronary Syndrome
Adhesive Pericarditis
Aneurysm
  • View other providers who treat Aneurysm
Aneurysm and Dissection of Heart
Aortic Aneurysm
Aortic Diseases
Aortic Dissection
Aortic Stenosis
Arrhythmias
Atrial Septal Defect
Benign Heart Tumors
Benign Mediastinal Tumor
Biventricular Heart Failure
Cardiac Tamponade
Cardiomyopathy
Collapsed Lung (Pneumothorax)
Congenital Aortic Valve Disorders
Congestive Heart Failure
Coronary Artery Dissection
Diaphragmatic and Hiatal Hernia
Empyema
  • View other providers who treat Empyema
Endocarditis
Esophageal Fistula
Heart Disease
Heart Valve Diseases
Hypertensive Heart with Failure
Hypertensive Heart without Failure
Interstitial Lung Disease
Lung Cancer
Mediastinal Tumors
Mitral and Aortic Valve Disorder
Mitral Valve Stenosis
Neuroendocrine Tumors
Nonrheumatic Mitral Stenosis
Paroxysmal Atrial Fibrillation
Partial Lung Collapse
Patent Ductus Arteriosus
Patent Foramen Ovale (PFO)
Pericardial Disease
Pleura Cancer
Pleural Cancer
Pleural Effusion
Pulmonary Disease
Pulmonary Embolism
Pulmonary Valve Disease
Rheumatic Aortic Valve Disorders
Rheumatic Mitral Stenosis
Ruptured Aortic Aneurysm
Septal Defect
Septic Embolism
Subacute Endocarditis
Systolic Heart Failure
Thoracoabdominal Aortic Aneurysm
Thymomas
  • View other providers who treat Thymomas
Typical Atrial Flutter
Vascular Disease
Ventricular Fibrillation
Ventricular Septal Defect
Ventricular Tachycardia (VT)
Ablation for Cardiac Arrhythmias
Abscess or Cyst Drainage or Aspiration
Aortic Arch Repair
Aortic Reconstruction Surgery
Aortic Repair
Aortic Valve Replacement
Arterial Catheterization with Robotic Assist
Atrial Fibrillation Surgery
Atrial Tissue Ablation
Cardiac Catheterization with Robotic Assist
Decortication and Pleurectomy
Endovascular Repair of Thoracic Aorta
Heart Defect Repair
Heart Surgery
Heart Valvuloplasty of Mitral Valve Without Replacement
Hyperhidrosis and Minimally Invasive Sympathectomy
Insertion of Epicardial Lead for Pacemaker or Cardioverter and Defibrillator
Insertion of Left Ventricular Lead for Pacemaker or Cardioverter and Defibrillator
Left Ventricular Assist Device (LVAD)
Lobectomy of Lung with Robotic Assist
Lung Surgery
Lymph Node Biopsy or Excision
Minimally Invasive Heart Surgery
Mitral Valve Prosthetic Implantation
Mitral Valve Repair
Mitral Valve Replacement
Non-Coronary Angioplasty, Atherectomy, and Stenting
Open Lobectomy
Open Thymectomy
Port Placements or Replacements
Pulmonary Valve Surgery
Puncture Aspiration
Resection of Cardiac Tumor
Thoracentesis
Thoracoscopic Wedge Resection
Thromboendarterectomy or Excision of Infected Graft
Tilt_Testing
Transcatheter Aortic Valve Replacement (TAVR)
Tricuspid Valve Surgery
Video-Assisted Thoracoscopic Surgery (VATS) or Thoracotomy

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • Choice Plus POS II
  • National (BlueCard) PPO
  • Anthem Blue Cross Blue Shield PPO
    Blue Preferred Plus POS
  • Blue Cross Accord
  • Blue Card PPO
  • HealthyBlue 2.0
    HealthyBlue Advantage
  • Cigna PPO
    Open Access Plus
  • First Health (Coventry Health Care) PPO
  • Choice Care PPO

Locations

  1. 1 St. Paul Cardiovascular Surgical Services
    225 Smith Ave N Ste 400, Saint Paul, MN 55102
    Icon Directions Right Arrow Directions Phone Icon (651) 292-0007
  2. 2 St. Paul Cardiovascular Surgical Services
    225 Smith Ave N Ste 400, Saint Paul, MN 55102
    Icon Directions Right Arrow Directions Phone Icon (651) 241-7176
  3. 3 Select Speciality Hospital- Sioux Falls
    1305 W 18th St, Sioux Falls, SD 57105
    Icon Directions Right Arrow Directions Phone Icon (605) 331-3130
  4. 4 Sanford Clinic Cardiac Thoracic & Vascular Surgery
    1301 W 18th St, Sioux Falls, SD 57105
    Icon Directions Right Arrow Directions Phone Icon (605) 312-2100

Patient Satisfaction

Likelihood to recommend Dr. Grehan
4.9
Based on 84 Reviews
5 Stars (80)
4 Stars (1)
3 Stars (0)
2 Stars (1)
1 Star (2)

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Patient Reviews
Oct 27, 2021
Dr Grehan is an excellent surgeon, very knowledgeable and has a great bedside manner. He always answers any questions you have. He did my mitral valve repair and one bypass. He told me everything up front and took the time to figure out exactly what I needed and when. He made me stay one day longer in the hospital which wasn't received well at the time but it was the best thing for me and sped up my recovery. He really knows hearts. My wife is so happy because I will live a lot longer due to Dr Grehan's skill and knowledge.
Michael Ferguson — Oct 27, 2021
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Photo: Dr. John Grehan, MD
How would you rate your experience with Dr. John Grehan, MD?
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Dr. Grehan's Office & Staff

  • Ease of scheduling urgent appointments
  • Office environment, cleanliness, comfort, etc.
  • Staff friendliness and courteousness
  • Total wait time (waiting & exam rooms)

Experience with Dr. Grehan

  • Level of trust in provider's decisions
  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Hpends appropriate amount of time with patients

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About Me

Specialties*
Cardiothoracic Surgery
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Education

Education

Medical Education
  • University of Minnesota Medical School
    1995
Medical Education

Board Certifications

Board Certifications
  • Cardiovascular Surgery, Thoracic Cardiovascular Surgery and Thoracic Surgery
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

Internship

Internship
  • Fairview University Medical Center
    1996
Internship

Residency

Residency Hospital
  • Fairview University Medical Center
    2004
Residency Hospital

Fellowship

Fellowship Hospital
  • University Michigan Health System
    2006
Fellowship Hospital
Common Questions and Answers
Responses are sourced directly from patients.
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. John Grehan, MD. To arrange an appointment, call the number on Dr. Grehan's profile.

Dr. John Grehan, MD is affiliated with United Hospital.

Yes, Dr. John Grehan, MD holds board certification in Cardiovascular Surgery, Thoracic Cardiovascular Surgery and Thoracic Surgery.

Hospital Affiliations

  • United Hospital

    333 Smith Ave N, Saint Paul, MN