Our Physicians

Our Doctors

Johnson Massey, MD

Dr. Massey has over 34 years of cardiology experience since beginning practice in the central Florida area in 1983. He is a graduate of King Edward Medical University in Lahore, Pakistan. He completed his internal medicine residency at Montefiore Hospital in Mount Vernon, New York followed by a cardiology fellowship at St. Vincent Medical Center in Bridgeport, Connecticut. He is board certified in internal medicine and cardiology. He is a member of the American College of Cardiology. His main areas of interest include clinical cardiology, nuclear cardiology, cardiac catheterization and pacemaker implantation. Dr. Massey is happily married with three adult children. He enjoys spending his free time with his family, reading and participating as an active member of his church.

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Patrick Mathias, MD

I am very grateful, that in the last 30 years, I have been part of the system that has reduced the mortality of a heart attack by 75%, heart failure by 50%, and has significantly increased the life expectancy of all Americans. I look forward to further wonderful scientific advancements in cardiology that will better the life of my patients. I am a little impatient that our medical community has not been strong enough advocates for the prevention of heart disease.

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Robert Barrett, MD

American College of Physicians
American College of Cardiology
American Board of Internal Medicine – 1989
American Board of Cardiovascular Disease – 1992
Interventional Cardiology Board – 1999

Thomas Kim, MD

Fellow, America College of Cardiology
Diplomat, National Board of Internal Medicine: September 1992
Diplomat, National Board of Medical Examiners: May 1990
Diplomat, Certification Board of Cardiovascular Computed Tomography September 2008-2019

Mukesh Kumar, MD

Board certified in Interventional Cardiology, 2003
Board certified in cardiology, 2001
Critical care fellowship, 1998
Board certified in internal medicine, 1997
Board eligible in critical medicine
Board certified in internal medicine in India

Naushad Shaik, MD

Dr. Naushad Shaik is an experienced Cardiac Electrophysiologist and Cardiologist who joined Cardiovascular associates in 2009. He specializes in performing complex ablation procedures for arrhythmias which include supraventricular arrhythmias, atrial fibrillation and ventricular arrhythmias, device implantations- pacemakers and defibrillators.

Jooby John, MD

Diplomate, American Board of Internal Medicine: Interventional Cardiology
Diplomate, American Board of Internal Medicine: Cardiovascular Disease
Diplomate, American Board of Internal Medicine: Internal Medicine
Diplomate, National Board of Echocardiography
Diplomate, Certification Board of Nuclear Cardiology
Diplomate, Certification Board of Cardiac CT
Diplomate, American Board of Vascular Medicine: Vascular Medicine
Diplomate, American Board of Vascular Medicine: Endovascular Medicine
Fellow, America College of Cardiology (FACC)
Fellow, Society of Cardiac Angiography and Interventions (FSCAI)

Our Nurse Practitioners

Allison Germaine, ARNP

Allison Germaine has an extensive background in healthcare that expands to nearly 25 years. Within this experience, she has gained...

Dawna N. Hazelwood, ARNP

Dawna N. Hazelwood, a native of Savannah, Georgia, is a board-certified nurse practitioner specializing in acute care. She completed her...