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


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About T. Colin Killeen, DO

Fellow-American College of Physicians 2018

Masters of Public Health-Dartmouth College 2020

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

Professional Highlights

  • Fellow-American College of Physicians 2018

    Masters of Public Health-Dartmouth College 2020


  • Internal Medicine


  • American College of Physicians

    Society of General 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 1/5/2021, 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

163 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
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

23 Patient Comments

Reviewed on Apr 30, 2021

Dr. Killeen is a great listener and explainer. I feel confident in his advice and plans for my ongoing care.

Reviewed on Apr 23, 2021

Dr. Killeen has been my primary care provider for years. He is the best ! always listens to my needs, takes his time never rushing, validates my concerns, makes me feel important, and has a definite plan of care in place. Would recommend to all!

Reviewed on Mar 16, 2021

Very caring physician - I felt an immediate connection and concern for my well-being.

Reviewed on Mar 5, 2021

Great doctor

Reviewed on Mar 5, 2021

Dr. Killeen was absolutely phenomenal to work with. He showed so much care, concern and attentiveness. He is really an excellent doctor.

Reviewed on Mar 3, 2021

best doctor I have had

Reviewed on Feb 8, 2021

Provider gave several treatment alternatives and allowed me to choose the path I wanted to take.

Reviewed on Jan 22, 2021

Dr. Killeen is terrific in explaining and discussing matters, answering questions, and giving advice

Reviewed on Dec 21, 2020

a caring doctor.

Reviewed on Dec 17, 2020

Excellent doctor.

Reviewed on Dec 15, 2020

I am so grateful to Dr Kiileen for seeing me on a timely basis and ordering the tests I needed to set my mind at ease. He readily agreed to add me as a patient, as my husband is cared for by him.

Reviewed on Nov 13, 2020

the doctor was 45 minutes late and rushed through the appointment, not really listening. He even told me to take on over the counter medication that would interfere with my prescribed medication

Reviewed on Sep 23, 2020

very good experience as always! I love having such a highly respected hospital system right in my backyard. Thanks for everything you and your whole team of doctors/ nurses are doing for our community and northeast ohio

Reviewed on Sep 1, 2020

Very easy to quickly establish rapport w/ Dr. Killeen.

Reviewed on Aug 31, 2020

Dr. Kileen did an excellent job with this virtual appointment--he was on time, and while it only lasted 10 minutes, I never felt at all rushed in the conversation about my needs. He was also very patient with the noise interruptions from my toddler.

Reviewed on Aug 24, 2020

Dr K is just a cool dude and all that that entails.

Reviewed on Aug 21, 2020

I really feel that Dr. Killeen knows who I am and if he does not, he taps into enough info before our meetings to make me feel that he understands my concerns

Reviewed on Jul 31, 2020

Doctor addressed all my concerns. Dr. Killeen is simply the best!

Reviewed on Jul 31, 2020

Dr. Killeen is my absolute favourite doctor (and I have a lot of different doctors). He is one of the first and only doctors that always tries to find me a solution to my problems. I always feel heard and cared for. I like him so much that I suggested him to my roommate and she now has an appointment scheduled with him.

Reviewed on Jun 8, 2020

My vsit to see Doctor Killeen was very good.

Reviewed on Jun 5, 2020

Dr. Killeen is truly one of the best physicians I've ever had! He listens to your concerns, and responds back in a reasonable time frame whenever I email. Thank you for having him on your staff!

Reviewed on Jun 5, 2020

My visit was excellence. I want to thank provider Killeen for sending me to the Emergency Room. Because my blood pressure was really high when I got there.

Reviewed on Jun 4, 2020

Dr. Killeen is an excellent provider who follows up on past conversations and listen to new ones while providing fair and honest feedback

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