Overview
John Gassler is a Cardiologist in Rochester, New York. His top areas of expertise are Atrial Fibrillation, Hypertension, Inappropriate Sinus Tachycardia (IST), and Familial Ventricular Tachycardia.
His clinical research consists of co-authoring 7 peer reviewed articles. MediFind looks at clinical research from the past 15 years.
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- EPO
- POS
- PPO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE PART D
- INSURANCE PLAN
- MEDICARE MAPD
Locations
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.
Cardiology Clinical Group
Mehmet Aktas is a Cardiac Electrophysiologist and a Cardiologist in Rochester, New York. Dr. Aktas is highly rated in 19 conditions, according to our data. His top areas of expertise are Arrhythmias, Ventricular Tachycardia, Ventricular Fibrillation, Cardiac Ablation, and Pacemaker Implantation.
Cardiology Clinical Group
Spencer Rosero is a Cardiac Electrophysiologist and a Cardiologist in Rochester, New York. Dr. Rosero is highly rated in 15 conditions, according to our data. His top areas of expertise are Arrhythmias, Ventricular Tachycardia, Long QT Syndrome, Pacemaker Implantation, and Cardiac Ablation.
Cardiology Clinical Group
Jeffrey Alexis is a Cardiologist and an Advanced Heart Failure and Transplant Cardiologist in Rochester, New York. Dr. Alexis is highly rated in 9 conditions, according to our data. His top areas of expertise are Cardiomyopathy, Heart Failure, Peripartum Cardiomyopathy, Arrhythmogenic Right Ventricular Cardiomyopathy, and Heart Transplant.
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
- Experienced
- ArrhythmiasDr. Gassler isExperienced. Learn about Arrhythmias.
- Atrial FibrillationDr. Gassler isExperienced. Learn about Atrial Fibrillation.
- Familial Ventricular TachycardiaDr. Gassler isExperienced. Learn about Familial Ventricular Tachycardia.
- Heart FailureDr. Gassler isExperienced. Learn about Heart Failure.
- HypertensionDr. Gassler isExperienced. Learn about Hypertension.
- Inappropriate Sinus Tachycardia (IST)Dr. Gassler isExperienced. Learn about Inappropriate Sinus Tachycardia (IST).

