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Lonnie T. Sullivan II
Cone Health Medical Group

Lonnie T. Sullivan II, MD

Specialties

  • Non-Invasive Cardiology,
  • Cardiology
Patient Rating
4.9/5 (Based on 191 Reviews)
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Biography

Lonnie T. Sullivan II, MD, specializes in cardiology with professional interests in non-invasive cardiology and advanced cardiovascular imaging. He is board certified in echocardiography, nuclear cardiology, cardiac magnetic resonance imaging (MRI), internal medicine and cardiovascular disease.

Genuinely invested in the lives and health outcomes of patients who entrust him with their care, he is known for his ability to combine clinical expertise with an understanding of each person’s unique circumstances and goals to ensure care goes beyond treating disease alone. His philosophy centers on building authentic relationships and tailoring treatment plans to meet the specific needs of every patient.

Outside of work, he enjoys spending quality time with his wife and children and watching sports.

“My patient relationships are akin to a captain and co-captain. I want patients to be integral to the shared decision-making process and feel empowered to help ‘steer the ship’ of their care.” – Lonnie T. Sullivan II, MD 

Profile

Education

Medical School

Duke University School of Medicine

Undergraduate

Morehouse College, BS, Biology

Residency

Duke University Medical Center, Internal Medicine, Chief Resident

Fellowship

Duke University Medical Center, General Cardiovascular

Board Certifications

  • Echocardiography
  • Nuclear Cardiology
  • Cardiac MRI

  • Internal Medicine

  • Cardiovascular Disease

Locations

Provider Review Comments

April 26, 2026
I've already made recommendations
April 19, 2026
Dr Sullivan is exceptional! Very knowledgeable but also very personable!
April 15, 2026
Dr Sullivan was attentive, professional and compassionate.
April 15, 2026
No problem
April 14, 2026
Dr. Sullivan is so nice and personable. He makes you feel he is concerned about your health and care. I am so glad he was assigned as my doctor!
April 08, 2026
Like DrSullivan very much
March 27, 2026
I have already posted about this provider on my Facebook page! He was incredible. He listened to everything I had to say and summed it all up perfectly in the summary. He explained everything patiently. He was understand and compassionate. And the biggest thing for me was how at ease and comfortable he made me feel. I was anxious about this appointment and his friendliness took all that away in the first few minutes! Highly impressed with my visit with him.
March 22, 2026
Dr. Sullivan was excellent! He listened to my concerns and explained everything very well.
March 20, 2026
Dr. Sullivan took time asking questions, understood my concerns and make recommendations.
March 14, 2026
Dr Sullivan goes beyond in personality, friendliness and professionalism. Has a sense of humor that puts you at ease right away
March 04, 2026
Dr. Sullivan, extremely caring & professional. Explained everything in detail & brought it down to layman, understandable terms.
February 26, 2026
For his age it was absolutely refreshing to see this Doctor at work. He was warm kept eye contact at all times he even held my hand when I broke down and cried. He was very knowledgeable and he truly have a gift of care for his patients. His bedside manner should be taught to other Doctors. Often time Dr forget their patients are human This Doctor has a heart for ppl. I will tell everyone I know about My Doctor.
February 25, 2026
Very professional
February 13, 2026
Everything and everyone was wonderful!!!
February 11, 2026
Very good at listening and explaining what was wrong.
February 01, 2026
Good response to issues and concerns
January 18, 2026
Dr. Sullivan made me feel at ease with talking about my health concerns and explained everything clearly.
January 18, 2026
I thank God for Dr.Sullivan for running a blood sample to help me understand about my blood. He even called me at 6pm when I was worried. He feels like family like he wants to see me live a long life.
January 16, 2026
Dr. Sullivan has excellent personal people skills and ensured I got all my questions answered.He was very informative and very precise as to providing direction for me to improve my health deficits.
January 12, 2026
Dr. Sullivan is amazing- nice guy, great bedside manner, and has the ability to make you feel comfortable about any subject. So happy to have him as my new cardiologist
January 09, 2026
First visit with Dr Sullivan. Very pleasant and easy to talk with. Went over EKG and explained electrical conduct issue. Would easily recommend.
January 03, 2026
I have never been to a cardiologist before and I was very anxious about what would happen/what would be found. Dr. Sullivan immediately put me at ease and answered questions until I did not have any left to ask.
December 21, 2025
Dr. Sullivan is a significant improvement with regard to the two providers that I have been assigned to in the past. He is outstanding.
December 17, 2025
Dr Lonnie Sullivan was very kind, attentive and responsive to my concerns and included me in all medical decisions. I did not feel rushed at all
December 15, 2025
He really seemed to listen and put full care and effort into me and my problem which was nice.
December 13, 2025
I was incredibly impressed with Dr. Sullivan's knowledge and compassion.
November 26, 2025
Exceptional explanations of upcoming studies and options after that.
November 23, 2025
Very good experience and atmosphere
November 20, 2025
Everything was great
November 20, 2025
It was a pleasure to have a doctor who was kind, listened, educated made me confident he was going to get me feeling better. He contacted me immediately with results and treatment plan. I already feel better and my mind is finally at ease. Dr. Lonnie Sullivan is the best.
November 17, 2025
Everyone was friendly and very helpful
November 09, 2025
Dr. Sullivan was excellent in every respect.
November 03, 2025
Dr Sullivan was personable. He listened and did not make me feel rushed. He exhibited care and concern for my wellbeing.
November 01, 2025
Very Thorough, professional, and concerning
September 28, 2025
Dr Stevenson was very knowledgeable about my condition and went over my symptoms and prescribed the best medication to take going forward. I have completed confidence in his diagnosis and prescribed treatment.
September 27, 2025
I loved Dr. Sullivan. This was my first visit with him. He was professional yet very personable and friendly. I have no further needs to see him but I will definitely keep his name for any future needs.
September 19, 2025
Most Definitely will Highly recommend Everyone I know to come to yalls Establishment
September 16, 2025
Fantastic staff...Dr. Sullivan was a 10+
September 12, 2025
Excellent visit
September 10, 2025
It was a pleasure to work with Dr. Sullivan and his team. He put me at ease because I was quite nervouse because this was my fiirst ever visit to a Cardiologist. He is an excellent listener and explained everything to me in a very easy to udnerstand way. What a great eexperience!
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