• Heart Care at Summit Cardiology

  • Keeping Your Heart Healthy

    At Summit Cardiology, you'll find unparalleled compassionate care paired with the absolute best in technology, expertise and experience. All of which is good for your heart health. 

    Our cardiologists specialize in diagnosing and treating patients with cardiac conditions including:

    • Cardiac risk factors
    • Arrhythmias
    • Heart failure
    • Hypertension
    • Pulmonary hypertension a
    • Valvular heart disease. 

    Meet our Cardiologists:

    Our cardiologists see patients in Frisco, and Dr. Lemis also sees patients in Granby and Leadville.

  • cardiomeetourphys_WarrenLJohnson.jpgDr. Warren L. Johnson, Jr. MD, FACC is a Board-Certified cardiologist. He comes from Kansas City, Missouri where he practiced as a cardiologist for over 30 years at Cardiovascular Consultants and the Mid American Heart Institute. In May 2009 he opened a new practice, Summit Cardiology, which serves Summit County residents and visitors. 

    Dr. Johnson's training included a Medical Degree from the University of Kansas and an Internal Medicine Residency and Cardiology Fellowship from the Mayo Clinic in Rochester, Minnesota. As a highly accomplished, Board-Certified cardiologist, some of his medical experiences and memberships include:

    • Clinical Cardiologist, Mayo Clinic
    • Interventional Cardiologist, Mid America Heart Institute at St. Luke's Hospital, Kansas City
    • Clinical Professor of Medicine, University of Missouri at Kansas City
    • President of Medical Staff, St. Luke's Hospital, Kansas City
    • Fellow, American College of Cardiology and American Society of Interventional Cardiology

     Dr. Johnson and Summit Cardiology are now accepting new patients. 

    To schedule an appointment, please call 970-668-9772.

    Peter Lemis - CardiologistDr. Peter Lemis is a board-certified cardiologist at Summit Cardiology. Prior to joining Centura, Dr. Lemis was a partner at Jefferson Cardiology Association in Pittsburgh, Pennsylvania where he has been in private practice for almost 30 years.

    Board-certified in both internal medicine and cardiovascular medicine, Dr. Lemis earned his medical degree from New York Medical College in Valhalla, New York. He completed his internal medicine residency at Long Island Jewish – Hillside Medical Center, New Hyde Park, New York. Following his residency, he completed a clinical cardiology fellowship at the Henry Ford Hospital in Detroit, Michigan.

    When it comes to treating patients, Dr. Lemis believes in treating patients like people, not just as an illness or a medical problem. He uses the most advanced medical knowledge to provide compassionate, supportive care as he helps patients work towards better health.

    Some of Dr. Lemis’s medical experiences and memberships include:

    • Fellow, American College of Cardiology
    • American College of Physicians
    • American Society of Nuclear Cardiology
    • Phi Beta Kappa

    Dr. Lemis is accepting new patients. To schedule an appointment, please call 970-668-9772.

  • Heart Health Screening

    FREE Heart Health Screenings

    Are you living heart-healthy at altitude? A 5-10 minute screening could save your life!

  • Schedule an Appointment

    Phone: 970-668-9772


    Summit Medical Center - Medical Office Building
    360 Peak One Drive, Suite 390
    Frisco, CO 80443

    Dr. Lemis serves patients in Grand County and Lake County as follows:

    Middle Park Medical Center – Granby
    1st and 3rd Mondays of the month 
    1000 Granby Park Drive, South 
    Granby, CO 80446

    St. Vincent Hospital and Medical Clinic 
    2nd and 4th Mondays of the month 
    825 W. 6th Street 
    Leadville, CO 80461

    Patient Forms

    Download and complete these forms prior to your appointment, or arrive 20 minutes early.

    Read our Notice of Privacy Practices.

    *Summit Cardiology is owned and operated by Centura Health Physician Group.

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