Overview
John Key is a Cardiologist practicing medicine in Greenville, Michigan.
Dr. Key is highly rated in 31 conditions, according to our data. His clinical expertise encompasses Aortic Regurgitation, Pediatric Myocarditis, Vasculitis, and Necrosis.
Dr. Key is board certified in American Board Of Internal Medicine. Dr. Key is currently accepting new patients.
Specialties
Licenses
Board Certifications
Fellowships
Hospital Affiliations
Languages Spoken
Gender
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- MEDICARE MAPD
- MEDICARE SNP
- OTHER MEDICARE
- OTHER MEDICARE PART D
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- EPO
- INSURANCE PLAN
- MEDICARE MAPD
- MEDICARE PDP
- OTHER COMMERCIAL
- OTHER MEDICARE
- PPO
- OTHER MEDICARE
- OTHER MEDICARE PART D
- EPO
- HMO
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- 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
- OTHER MANAGED MEDICAID
- HMO
- OTHER MEDICAID
- STATE MEDICAID
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE PART D
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- EPO
- HMO
- PPO
- HMO
- POS
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- OTHER COMMERCIAL
- EPO
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MEDICARE MAPD
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
615 South Bower Street, Greenville, MI 48838
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Frequently Asked Questions about Dr. John A. Key
How do I make an appointment with Dr. John A. Key?
You can book an appointment with Dr. John A. Key by calling their office at 616-225-7010. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.
Is Dr. John A. Key a top-rated expert for Aortic Regurgitation?
MediFind is an objective health platform that identifies experts based on real-world data. Dr. John A. Key is classified as an Distinguished expert for Aortic Regurgitation, 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 A. Key specialize in?
While Dr. John A. Key is a Cardiology, they have specific expertise in Aortic Regurgitation, Pediatric Myocarditis, and Vasculitis. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Cardiology.
Does Dr. John A. Key accept my insurance?
Dr. John A. Key accepts most major insurance plans, including Aetna and Alignment Health Plan. We recommend calling the office directly at 616-225-7010 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
- Distinguished
- Aortic RegurgitationDr. Key isDistinguished. Learn about Aortic Regurgitation.
- NecrosisDr. Key isDistinguished. Learn about Necrosis.
- Pediatric MyocarditisDr. Key isDistinguished. Learn about Pediatric Myocarditis.
- VasculitisDr. Key isDistinguished. Learn about Vasculitis.
- Advanced
- AnginaDr. Key isAdvanced. Learn about Angina.
- Aortic Valve StenosisDr. Key isAdvanced. Learn about Aortic Valve Stenosis.
- ApoplexyDr. Key isAdvanced. Learn about Apoplexy.
- ArrhythmiasDr. Key isAdvanced. Learn about Arrhythmias.
- Arrhythmogenic Right Ventricular Cardiomyopathy
- Arterial EmbolismDr. Key isAdvanced. Learn about Arterial Embolism.
- AtherosclerosisDr. Key isAdvanced. Learn about Atherosclerosis.
- Atrial FibrillationDr. Key isAdvanced. Learn about Atrial Fibrillation.
- Brugada SyndromeDr. Key isAdvanced. Learn about Brugada Syndrome.
- Budd-Chiari SyndromeDr. Key isAdvanced. Learn about Budd-Chiari Syndrome.
- CardiomyopathyDr. Key isAdvanced. Learn about Cardiomyopathy.
- Coronary Heart DiseaseDr. Key isAdvanced. Learn about Coronary Heart Disease.
- Ectopic HeartbeatDr. Key isAdvanced. Learn about Ectopic Heartbeat.
- FaintingDr. Key isAdvanced. Learn about Fainting.
- Familial Ventricular Tachycardia
- Glucocorticoid-Remediable Aldosteronism
- Heart AttackDr. Key isAdvanced. Learn about Heart Attack.
- Heart BlockDr. Key isAdvanced. Learn about Heart Block.
- Heart FailureDr. Key isAdvanced. Learn about Heart Failure.
- Heart Failure with Preserved Ejection Fraction (HFpEF)
- HypertensionDr. Key isAdvanced. Learn about Hypertension.
- Inappropriate Sinus Tachycardia (IST)
- Mitral Valve RegurgitationDr. Key isAdvanced. Learn about Mitral Valve Regurgitation.
- Postural Orthostatic Tachycardia Syndrome (POTS)
- Pulmonary EdemaDr. Key isAdvanced. Learn about Pulmonary Edema.
- Pulmonary EmbolismDr. Key isAdvanced. Learn about Pulmonary Embolism.
- Short QT SyndromeDr. Key isAdvanced. Learn about Short QT Syndrome.
- Experienced
- Acute Coronary SyndromeDr. Key isExperienced. Learn about Acute Coronary Syndrome.
- Adenosine Deaminase 2 DeficiencyDr. Key isExperienced. Learn about Adenosine Deaminase 2 Deficiency.
- Anomalous Left Coronary Artery from the Pulmonary Artery
- Arterial InsufficiencyDr. Key isExperienced. Learn about Arterial Insufficiency.
- Atrial TachycardiaDr. Key isExperienced. Learn about Atrial Tachycardia.
- Atrioventricular Nodal Reentrant Tachycardia (AVNRT)
- Bicuspid Aortic ValveDr. Key isExperienced. Learn about Bicuspid Aortic Valve.
- Cardiac ArrestDr. Key isExperienced. Learn about Cardiac Arrest.
- Carotid Artery DiseaseDr. Key isExperienced. Learn about Carotid Artery Disease.
- Congenital Coronary Artery Malformation
- Cor PulmonaleDr. Key isExperienced. Learn about Cor Pulmonale.
- Coronary Artery AneurysmDr. Key isExperienced. Learn about Coronary Artery Aneurysm.
- Coronary Artery FistulaDr. Key isExperienced. Learn about Coronary Artery Fistula.
- Degos DiseaseDr. Key isExperienced. Learn about Degos Disease.
- Dilated Cardiomyopathy (DCM)Dr. Key isExperienced. Learn about Dilated Cardiomyopathy (DCM).
- DysfibrinogenemiaDr. Key isExperienced. Learn about Dysfibrinogenemia.
- EndocarditisDr. Key isExperienced. Learn about Endocarditis.
- Factor 10 DeficiencyDr. Key isExperienced. Learn about Factor 10 Deficiency.
- Factor 12 DeficiencyDr. Key isExperienced. Learn about Factor 12 Deficiency.
- Factor 13 DeficiencyDr. Key isExperienced. Learn about Factor 13 Deficiency.
- Factor 5 DeficiencyDr. Key isExperienced. Learn about Factor 5 Deficiency.
- Factor 7 DeficiencyDr. Key isExperienced. Learn about Factor 7 Deficiency.
- Factor V Leiden ThrombophiliaDr. Key isExperienced. Learn about Factor V Leiden Thrombophilia.
- Familial Dilated CardiomyopathyDr. Key isExperienced. Learn about Familial Dilated Cardiomyopathy.
- Familial Hypertrophic Cardiomyopathy
- Familial HypofibrinogenemiaDr. Key isExperienced. Learn about Familial Hypofibrinogenemia.
- Familial Neurocardiogenic SyncopeDr. Key isExperienced. Learn about Familial Neurocardiogenic Syncope.
- Familial Progressive Cardiac Conduction Defect
- Heart MurmursDr. Key isExperienced. Learn about Heart Murmurs.
- Hereditary Resistance to Anti-Vitamin K
- High CholesterolDr. Key isExperienced. Learn about High Cholesterol.
- High Molecular Weight Kininogen Deficiency
- His Bundle TachycardiaDr. Key isExperienced. Learn about His Bundle Tachycardia.
- Hypertensive Heart DiseaseDr. Key isExperienced. Learn about Hypertensive Heart Disease.
- Idiopathic EdemaDr. Key isExperienced. Learn about Idiopathic Edema.
- Jervell Lange-Nielsen Syndrome (JLNS)
- Long QT SyndromeDr. Key isExperienced. Learn about Long QT Syndrome.
- Long QT Syndrome 1Dr. Key isExperienced. Learn about Long QT Syndrome 1.
- Long QT Syndrome 2Dr. Key isExperienced. Learn about Long QT Syndrome 2.
- Long QT Syndrome 3Dr. Key isExperienced. Learn about Long QT Syndrome 3.
- Long QT Syndrome 5Dr. Key isExperienced. Learn about Long QT Syndrome 5.
- Low Blood PressureDr. Key isExperienced. Learn about Low Blood Pressure.
- Metabolic SyndromeDr. Key isExperienced. Learn about Metabolic Syndrome.
- Mitral StenosisDr. Key isExperienced. Learn about Mitral Stenosis.
- Mitral Valve ProlapseDr. Key isExperienced. Learn about Mitral Valve Prolapse.
- Multifocal Atrial TachycardiaDr. Key isExperienced. Learn about Multifocal Atrial Tachycardia.
- MyocarditisDr. Key isExperienced. Learn about Myocarditis.
- Orthostatic HypotensionDr. Key isExperienced. Learn about Orthostatic Hypotension.
- Paroxysmal Supraventricular Tachycardia (PSVT)
- Paroxysmal Ventricular Fibrillation
- PericarditisDr. Key isExperienced. Learn about Pericarditis.
- Peripheral Artery DiseaseDr. Key isExperienced. Learn about Peripheral Artery Disease.
- Protein C DeficiencyDr. Key isExperienced. Learn about Protein C Deficiency.
- Protein S DeficiencyDr. Key isExperienced. Learn about Protein S Deficiency.
- Prothrombin DeficiencyDr. Key isExperienced. Learn about Prothrombin Deficiency.
- Pulmonary HypertensionDr. Key isExperienced. Learn about Pulmonary Hypertension.
- Pulmonary Veno-Occlusive DiseaseDr. Key isExperienced. Learn about Pulmonary Veno-Occlusive Disease.
- Sengers SyndromeDr. Key isExperienced. Learn about Sengers Syndrome.
- Sick Sinus SyndromeDr. Key isExperienced. Learn about Sick Sinus Syndrome.
- SitosterolemiaDr. Key isExperienced. Learn about Sitosterolemia.
- Spontaneous Coronary Artery Dissection (SCAD)
- Stable AnginaDr. Key isExperienced. Learn about Stable Angina.
- Thoracic Aortic AneurysmDr. Key isExperienced. Learn about Thoracic Aortic Aneurysm.
- ThrombophlebitisDr. Key isExperienced. Learn about Thrombophlebitis.
- Timothy SyndromeDr. Key isExperienced. Learn about Timothy Syndrome.
- Transient Ischemic Attack (TIA)Dr. Key isExperienced. Learn about Transient Ischemic Attack (TIA).
- Unstable AnginaDr. Key isExperienced. Learn about Unstable Angina.
- Ventricular FibrillationDr. Key isExperienced. Learn about Ventricular Fibrillation.
- Wolff-Parkinson-White SyndromeDr. Key isExperienced. Learn about Wolff-Parkinson-White Syndrome.