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John A Key

John A Key, DO

4.9103 ratings, 26 reviews

Cardiac ImagingCardiology

Accepting New Patients
Need help scheduling? Call (616) 608-8300

Highlights

Age Groups Seen

  • Adult 18-64
  • Older Adult 65+

Languages

  • English

Gender

Male

Affiliations

  • Corewell Health Greenville Hospital
  • Corewell Health Gerber Hospital
  • Corewell Health Reed City Hospital
  • Corewell Health Big Rapids Hospital
  • Corewell Health Zeeland Hospital
  • Corewell Health Pennock Hospital
  • Corewell Health Ludington Hospital
  • Corewell Health Grand Rapids Hospitals

About John A Key

About the Provider

John Key, DO, FACC, is a board-certified cardiologist and is a Fellow of the American College of Cardiology. Dr. Key earned his medical degree from Kirksville College of Osteopathic Medicine in Missouri. He completed his internal medicine residency at St. Vincent Hospital and Health Care Center in Indianapolis, and completed his cardiovascular disease fellowship at Sinai Hospital in Detroit.

Dr. Key's clinical interests include noninvasive imaging of cardiovascular disease, cardiac stress testing, echocardiography, nuclear cardiology, general cardiology and preventive cardiology.

Locations

  1. Corewell Health Cardiovascular Services - Wyoming
    • 6105 Wilson Avenue Southwest, Suite 101, Wyoming, MI 49418
    • Get Directions
  2. Corewell Health Cardiovascular Services - Greenville

Experience

Education

  • Fellowship: Sinai-Grace Hospital, Cardiovascular Disease, 1996
  • Residency: Ascension St. Vincent Hospital Indianapolis, Internal Medicine, 1993
  • Internship: University of Michigan Health - West, 1990
  • Medical School: A.T. Still University of Health Sciences, Kirksville College of Osteopathic Medicine, Doctor of Osteopathic Medicine (DO), 1989

Board Certifications

  • Cardiovascular Disease: American Board of Internal Medicine, 1997

Insurance

Please contact the practice office to confirm your specific plan. If you have questions about paying for care or would like to speak to a financial counselor, please visit our financial assistance page.
Search plans
  • Aetna/Cofinity
  • Align Senior Care MI
  • BCBS Medicare Advantage Plus Blue
  • BCBS PPO
  • BCBS Traditional
  • Blue Care Network
  • Blue Care Network Medicare Advantage
  • Blue Cross Complete
  • Cigna
  • Coventry First Health
  • HAP/ASR
  • Humana Military (Tricare East)
  • McLaren Commercial
  • McLaren Medicaid
  • McLaren Medicare Advantage
  • Medicaid
  • Medicare
  • Meridian AmBetter
  • Meridian Complete (MI Health LINK) Dual Eligible
  • Meridian Medicaid
  • Molina Medicaid/MiChild/Marketplace (Health Plus)
  • Molina Medicare
  • Priority Health Choice Medicaid
  • Priority Health HMO/PPO
  • Priority Health Medicare Advantage
  • Railroad Medicare
  • Trinity Health Plan of MI
  • UHC/Optum (VA Community Care Network)
  • UM Health Plan
  • United Health Care Commercial
  • United Health Care Dual Complete

Ratings & Reviews

4.9 out of 5

103 ratings, 26 reviews

Corewell Health is committed to delivering high-quality and compassionate care. These ratings and reviews are transparent patient feedback collected via survey following a provider care experience that asks patients and families about the care they received.

Search reviews
    5 out of 5 stars
    Reviewed on 2/1/2026

    We need a "cure" for "white coat syndrome". I don't do very well with my blood pressure when I have an appointment. Bummer

    5 out of 5 stars
    Reviewed on 1/31/2026

    He is very personable and kind. He put my mind at ease and explained many things to me and answered all my questions.

    5 out of 5 stars
    Reviewed on 12/28/2025

    He made it very clear that he was going to try to help me figure out how to get my blood pressure down

    5 out of 5 stars
    Reviewed on 12/1/2025

    Excellent physician

    5 out of 5 stars
    Reviewed on 10/23/2025

    He listens

    5 out of 5 stars
    Reviewed on 10/18/2025

    He was very kind and caring.

    5 out of 5 stars
    Reviewed on 10/16/2025

    Excellent

    5 out of 5 stars
    Reviewed on 10/11/2025

    He was prepared for my visit. Took his time and answered all of my questions.

    5 out of 5 stars
    Reviewed on 9/26/2025

    I luv n trust Dr Key!

    5 out of 5 stars
    Reviewed on 8/29/2025

    We like Dr Key very much

    5 out of 5 stars
    Reviewed on 8/4/2025

    He is always very professional and covers all of my questions.

    5 out of 5 stars
    Reviewed on 7/25/2025

    Fueron exactos y precisos en mí padecimiento y diagnóstico.

    5 out of 5 stars
    Reviewed on 7/6/2025

    Excellent care.

    5 out of 5 stars
    Reviewed on 6/24/2025

    He is friendly, funny and puts you at ease. Great bed side manner.

    5 out of 5 stars
    Reviewed on 6/20/2025

    A excellent Dr

    5 out of 5 stars
    Reviewed on 6/20/2025

    Very helpful, kind and reassuring

    5 out of 5 stars
    Reviewed on 6/7/2025

    With a new diagnosis, which upset me, he spent time to explain it and answer questions.

    5 out of 5 stars
    Reviewed on 6/6/2025

    I have a great deal of confidence in Dr. Key. As I said in a previous comment, he is knowledgeable, competent, professional, and caring.

    5 out of 5 stars
    Reviewed on 6/4/2025

    I have been going to Dr. Key for over 20 years

    5 out of 5 stars
    Reviewed on 5/25/2025

    He was friendly, helpful, and honest. I like him. He is a good man and cardiologist.

    5 out of 5 stars
    Reviewed on 5/15/2025

    1st visit. Immediately comfortable around him

    5 out of 5 stars
    Reviewed on 4/25/2025

    Luv Dr Key!! He's down to earth n listenes

    5 out of 5 stars
    Reviewed on 3/28/2025

    All good👍

    5 out of 5 stars
    Reviewed on 3/27/2025

    Dr. Key is a very good cardiologist.

    5 out of 5 stars
    Reviewed on 3/19/2025

    reasonably personable or "good bedside manner"

    5 out of 5 stars
    Reviewed on 2/19/2025

    As Good as it Gets