Overview
Dr. John Grehan specializes in Cardiovascular & Thoracic surgery.
Dr. Grehan is highly rated in 6 conditions, according to our data. His clinical expertise encompasses Aortic Valve Stenosis, Bicuspid Aortic Valve, Aortic Regurgitation, Coronary Artery Bypass Graft (CABG), and Heart Valve Repair.
Dr. Grehan is board certified in American Board Of Thoracic SurgeryAmerican Board Of Surgery: General Surgery. He is actively involved in clinical research, co-authoring 6 peer reviewed articles and participating in 2 clinical trials.
Residency
Specialties
Licenses
Board Certifications
Hospital Affiliations
Languages Spoken
Gender
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- HMO
- INDEMNITY
- POS
- PPO
- EPO
- HMO
- PPO
- OTHER MEDICAID
- STATE MEDICAID
- HMO
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- HMO
- PPO
- EPO
- HMO
- POS
- PPO
- HMO
- POS
Locations
1301 W. 18th St., Sioux Falls, SD 57105
1301 W. 18th St., Sioux Falls, SD 57105
Clinical Research
Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.
2 Clinical Trials
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Frequently Asked Questions about Dr. John Grehan
How do I make an appointment with Dr. John Grehan?
You can book an appointment with Dr. John Grehan by calling their office at 605-312-2200. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.
Is Dr. John Grehan a top-rated expert for Coronary Artery Bypass Graft (CABG)?
MediFind is an objective health platform that identifies experts based on real-world data. Dr. John Grehan is classified as an Advanced expert for Coronary Artery Bypass Graft (CABG), meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.
What conditions does Dr. John Grehan specialize in?
While Dr. John Grehan is a General Surgery, they have specific expertise in Coronary Artery Bypass Graft (CABG), Heart Valve Repair, and Heart Bypass Surgery. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within General Surgery.
Does Dr. John Grehan participate in research or clinical trials?
Yes. Dr. John Grehan has published 6 articles and abstracts on conditions like Coronary Artery Bypass Graft (CABG). You can view a list of Dr. John Grehan's latest peer-reviewed publications and clinical trial participation on their profile to see if they are active in new treatments.
Does Dr. John Grehan accept my insurance?
Dr. John Grehan accepts most major insurance plans, including Health Care Services Corporation and Humana. We recommend calling the office directly at 605-312-2200 to verify that your specific plan is currently accepted before your visit.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Advanced
- Aortic Valve ReplacementDr. Grehan isAdvanced. Learn about Aortic Valve Replacement.
- Aortic Valve StenosisDr. Grehan isAdvanced. Learn about Aortic Valve Stenosis.
- Coronary Artery Bypass Graft (CABG)
- Heart Bypass SurgeryDr. Grehan isAdvanced. Learn about Heart Bypass Surgery.
- Heart Valve RepairDr. Grehan isAdvanced. Learn about Heart Valve Repair.
- Transcatheter Aortic Valve Replacement (TAVR)
- Experienced
- Aortic DissectionDr. Grehan isExperienced. Learn about Aortic Dissection.
- Aortic RegurgitationDr. Grehan isExperienced. Learn about Aortic Regurgitation.
- Arterial EmbolismDr. Grehan isExperienced. Learn about Arterial Embolism.
- Bicuspid Aortic ValveDr. Grehan isExperienced. Learn about Bicuspid Aortic Valve.
- Cystic Medial Necrosis of AortaDr. Grehan isExperienced. Learn about Cystic Medial Necrosis of Aorta.
- GastrostomyDr. Grehan isExperienced. Learn about Gastrostomy.