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Thomas O'Neill, MD

Thomas O'Neill, MD

  • Specialty: Cardiology, Cardiology-Heart Failure
  • Primary Location: 11100 Euclid Ave (0 mi.)
    Other Locations
  • Languages Spoken: English

Office Locations

UH Cleveland Medical Center Mather (0 mi.)

11100 Euclid Ave
Mather Ste 1800
Cleveland, OH 44106

216-844-3800

UH Cleveland Medical Center Mather (0 mi.)

11100 Euclid Ave
Mather Ste 1800
Cleveland, OH 44106
216-844-2566

UH Ahuja Medical Center (7 mi.)

3999 Richmond Rd
Beachwood, OH 44122
216-844-2566

UH Cleveland Minoff Health Center (7 mi.)

3909 Orange Pl
Ste 3300
Beachwood, OH 44122
216-844-3800

UH Parma Medical Arts Building 2 (11 mi.)

6707 Powers Blvd
Medical Arts Cntr 2 Ste 205
Parma, OH 44129
440-743-8511

UH Parma Fairlawn Health Center (25 mi.)

3800 Embassy Pkwy
Ste 220
Fairlawn, OH 44333
330-664-8050

UH Elyria Gates Medical Center (27 mi.)

125 E Broad St
Ste 101
Elyria, OH 44035
440-328-3410

UH Cleveland Medina Health Center (29 mi.)

4001 Carrick Dr
Ste 140
Medina, OH 44256
330-721-8582

Biography: Thomas O'Neill, MD

Titles

  • Associate Program Director, Cardiovascular Disease, UH Cleveland Medical Center
  • Associate Professor, CWRU School of Medicine

Certifications & Memberships

  • Advanced Heart Failure and Transplant Cardiology - American Board of Internal Medicine
  • Cardiovascular Disease - American Board of Internal Medicine
  • Internal Medicine - American Board of Internal Medicine

Education

Fellowship | Heart Failure and Cardiac Transplantation
Heart Failure and Cardiac Transplantation - Hospital Of The University Of Pennsylvania (2014 - 2015)

Fellowship | Cardiovascular Disease
Cardiovascular Disease - University Of North Carolina Health Care (2012 - 2014)

Fellowship | Cardiology
Cardiology - University Of North Carolina Health Care (2010 - 2012)

Residency | Internal Medicine
Internal Medicine - University Of North Carolina Health Care (2007 - 2010)

Medical Education
University Of Virginia School Of Medicine (2007)

Other Education
University Of Virginia (2006)

Undergraduate
Dartmouth College (1999)

About

Thomas Joseph (TJ) O’Neill, MD, is an advanced heart failure and heart transplantation specialist with University Hospitals Harrington Heart & Vascular Institute.

Dr. O’Neill is board certified in internal medicine, cardiovascular disease, and advanced heart failure and transplant cardiology. He earned his medical degree from the University of Virginia School of Medicine and completed an internal medicine residency and cardiovascular disease fellowship at the University of North Carolina, Chapel Hill. He completed a second fellowship in advanced heart failure and cardiac transplantation at the University of Pennsylvania in Philadelphia. Dr. O’Neill has earned several clinical and academic honors during his tenure.

Beyond his clinical practice, Dr. O’Neill is an avid researcher, with roles as principal investigator or co-principal investigator on multiple heart failure related clinical trials. Additionally, he has provided over 40 professional lectures on the management of advanced heart failure and authored numerous peer-reviewed publications and abstracts.

Dr. O’Neill is an active member of renowned organizations including the American College of Cardiology, American Society of Transplantation, Heart Failure Society of American, and the International Society of Heart and Lung Transplantation.

Featured Videos

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Patient Experience Reviews

5.0 out of 5
- based on 95 Ratings
(5)
9/2/2025

Explained test results and follow-up I terms I could understand.

(5)
9/2/2025

We really liked Dr. O'Neill . He wasProfessional, personable, and very kind.

(5)
9/2/2025

Everyone was so helpful, caring,and courteous!

(5)
9/2/2025

I love my Dr.,the receptionist and the nurse.They are all so nice and make me feel like I'm family sort of.

(5)
9/2/2025

Dr.O Neill takes more time with me than any physician ever has.Explains and listens to my concerns.

(5)
8/1/2025

Absolutely love the team that I work with over there

(5)
8/1/2025

Excellent care

(5)
8/1/2025

All was excellent!!!

(5)
8/1/2025

Dr. O'neill was excellent and cares about my health.

(5)
7/1/2025

Dr. O'Neill and his staff are excellent.

(5)
7/1/2025

Excellent experience

(5)
6/1/2025

Everyone at the office is wonderful, caring, compass, friendly and professional. Would highly recommend.

(5)
5/8/2025

Very knowledgeable and personable.

(5)
5/8/2025

Above and beyond and helping my Dad!

(5)
5/8/2025

Keep up the great work. Confident in my assessment and treatment with Dr. O'Neill Thank you.

(5)
5/8/2025

This is the best Doctor I have had for my problems!

(5)
3/2/2025

My entire experience in Dr. Thomas O'Neill's office with him, and also his nurse and everyone else included was very very pleasant and very easy to understand and follow. Dr. O'Neill and his staff put me at his concerning my medical conditions. I'm very pleased with everything I would recommend him his staff to anybody.

(5)
3/2/2025

*** Everything terrific!

(5)
3/2/2025

Very good care

(5)
3/2/2025

Great Dr. So glad I switched

(5)
2/2/2025

I was very satisfied been very happy with all the doctors and nurses and receptionist

(5)
2/2/2025

Really like this doctor. Friendly knowledgeable.

(5)
1/3/2025

Always a good experience.

(5)
12/3/2024

A very concerned Dr. Who cares about his patients

(5)
12/3/2024

Dr. O and his team have done an excellent job of managing my heart care! None better!

(5)
12/3/2024

Everything great

(5)
12/3/2024

I found the Doctor and the entire team, to be very professional. I have complete confidence in the advice I received

(5)
12/3/2024

Dr. O'Neill and his staff are great! They have been more than helpful. They have been very been very supportive and reassuring.

(5)
12/3/2024

Everything great!

(5)
11/1/2024

Great Doc.

(5)
11/1/2024

Everyone from front desk to doctor a 10. Fantastic all around.

(5)
11/1/2024

Very pleased with my doctor, he has been doing a great job.

(5)
11/1/2024

We share a mutual respect for each others questions answers and advice. Our program/plan is still in its infancy stage. We're learning and progressing in a positive manner with more positive results to come. I trust and respect Dr ONeill and work with him to improve my condition. Thanks to him his staff and the UH cardiologist.

Industry Relationships

University Hospitals is committed to transparency in our interactions with industry partners, such as pharmaceutical, biotech, or medical device companies. At UH, we disclose practitioner and their family members’ ownership and intellectual property rights that are or in the process of being commercialized. In addition, we disclose payments to employed practitioners of $5,000 or more from companies with which the practitioners interact as part of their professional activities. These practitioner-industry relationships assist in developing new drugs, devices and therapies and in providing medical education aimed at improving quality of care and enhancing clinical outcomes. At the same time, UH understands that these relationships may create a conflict of interest. In providing this information, UH desires to assist patients in talking with their practitioners about industry relationships and how those relationships may impact their medical care.

UH practitioners seek advance approval for certain new industry relationships. In addition, practitioners report their industry relationships and activities, as well as those of their immediate family members, to the UH Office of Outside Interests annually. We review these reports and implement management plans, as appropriate, to address conflicts of interest that may arise in connection with medical research, clinical care and purchasing decisions.

View UH’s policy (PDF) on practitioner-industry relationships.

As of December 31, 2016, Thomas O'Neill did not disclose any Outside Relationships with Industry.