Department Internal Medicine and Geriatrics
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon No


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Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Residency - NorthShore University Health System
Evanston, IL USA

Residency - University of Chicago NorthShore University Evanston Hospital
Evanston, IL USA

Medical Education - Michigan State University
East Lansing, MI USA

Undergraduate - University of Michigan
Ann Arbor, MI USA


  • Internal Medicine
Research & Publications

Research & Publications

See publications for T. Colin Killeen, DO.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 12/23/2019, Dr. Killeen has reported no financial relationship with industry that is applicable to this listing. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

Patient Satisfaction Reviews

59 Patient Satisfaction Reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.

Overall Star Ratings
4.9 out of 5
Explains 4.8
Listens 4.6
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

13 Patient Comments

Reviewed on Feb 21, 2020

Very pleased with my physician and the staff

Reviewed on Feb 3, 2020

The doc is scheduled far into the future. Makes it difficult to schedule if needed

Reviewed on Sep 24, 2019

Dr. Killeen is a true professional, a great listener and a gracious soul - FANTASTIC doctor!

Reviewed on Sep 24, 2019

I plan to have Dr. Killeen be my caregiver for the next 40+ years! He's a great doctor!

Reviewed on Sep 6, 2019

Dr. Killeen was very professional and thorough. He reviewed my medical history and asked if I had any additional questions. Was not treated as a "number," but as a patient.

Reviewed on Sep 5, 2019

Dr. Killeen is a true professional. Moreover, he's friendly, kind and compassionate.

Reviewed on Sep 3, 2019

Dr. Killeen is one of the most thoughtful and engaging medical professionals I've ever had contact with. he is genuinely interested in your concerns and offers excellent advice.

Reviewed on Sep 3, 2019

as I wrote prematurely, Dr. Killeen is the most caring and engaged doctor I've ever had the pleasure of receiving care from. I would recommend him most highly.

Reviewed on Aug 12, 2019

Dr. Killen is awesome. Very personable and truly listens to everything that is going on with me and able to read between the lines.

Reviewed on Jul 24, 2019

I have recommended Dr. Killeen to several friends and family members. He is very thorough and listens to my concerns.

Reviewed on May 17, 2019

Dr. Killeen is more than just a good doctor. He is a very compassionate person. He goes above and beyond in his care for me. I appreciate his extra mile attitude.

Reviewed on May 8, 2019

Dr. Killeen had a detailed comprehensive knowledge of my medical history and status before he came into the appointment room. he was fully engaged and it was evident that he was committed to my healthcare because he conveyed concern and caring. He had amazing knowledge and facts related to the areas of my healthcare issues and suggestions that were commensurate with me as an individual. I have a sense of confidence and trust that he is doing the best for me and my health care.

Reviewed on Feb 25, 2019

I like my doctor he listens and discuss everything.

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