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Department Internal Medicine and Geriatrics
Primary Location Langston Hughes Community Center
Type of Doctor Adults Only
Languages English
Surgeon No
Primary Location

Langston Hughes Community Center



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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

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 10/31/2023, 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

395 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 4.9
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

66 Patient Comments

Reviewed on Jan 4, 2024

Dr. T. Killeen is the best doctor I have ever visited. First time in my life my blood pressure wasn't through the roof when went to a doctor's appointment.

Reviewed on Jan 3, 2024

Dr. Killeen is an excellent physician.

Reviewed on Jan 3, 2024

Excellent provider. I feel fortunate to be cared for by Dr Kileen. I know he wants the best for all his patients.

Reviewed on Dec 21, 2023

I always have a great experience when I need to schedule an appointment with my provider.

Reviewed on Dec 21, 2023

I have a great relationship with my provider. I trust being in his care.

Reviewed on Dec 18, 2023

Excellent Doctor! Excellent staff!

Reviewed on Dec 18, 2023

Excellent caring doctor!

Reviewed on Dec 15, 2023

Dr. Killeen is the best! I'm so comfortable discussing anything about my health with him and I know he listens to my concerns. He's caring and empathetic, as well as professional.

Reviewed on Dec 15, 2023

I recommended Dr Killeen to a friend, she is now his patient.

Reviewed on Dec 6, 2023

It was great seeing Dr Killeen again

Reviewed on Dec 5, 2023

Dr Killeen was very personable and easy to communicate with.

Reviewed on Nov 30, 2023

Dr. Killeen is transparent, professional,, personal, very concerning, and authentic with his care.

Reviewed on Nov 28, 2023

When Dr McGervey moved to the hospital side I never thought I would find anyone comparable. Judging from the initial visit, Dr Killeen is coming close. I am 67 years old and would rate them the top two I have had

Reviewed on Nov 27, 2023

Dr. Killeen is excellent. He is the doctor that I trust the most.

Reviewed on Nov 21, 2023

I would highly recommend Dr. Killeen and have done so to many friends and family members. Best doctor that I have had at the Clinic.

Reviewed on Nov 20, 2023

Very professional and very comfortable with Dr. Killeen and staff.

Reviewed on Nov 16, 2023

I have a very good Doctor who cares about his patients. He's very professional about giving you the best care you need!!! Doctor Killeen Is wonderful!!!

Reviewed on Nov 9, 2023

Whenever I see Dr. Killeen it is always a productive visit. He listens to me and helps find solutions for issues physical and mental. I like seeing him at the community center. It's doesn't seem as if everything is rushed. 5 stars in my book for him and his team.

Reviewed on Nov 6, 2023

Doctor had outstanding, old school, bedside manner. I was impressed

Reviewed on Oct 27, 2023

I was happy to meet with Dr. Killeen in person. In the past, I was seen by his PA, Mr. Chan.

Reviewed on Oct 27, 2023

Dr. Killeen is an excellent listener and showed empathy, respectful humor and much knowledgeability during our visit. I found him very easy to talk to. He considered my preferences and answered my questions patiently and thoroughly.I would definitely recommend Dr. Killeen to others.

Reviewed on Oct 19, 2023

He did so well I'm thinking of seeing can I make him my primary.

Reviewed on Oct 16, 2023

Great. Good Physician

Reviewed on Oct 16, 2023

Dr. Kileen is awesome very easy to talk to and he listens to your concerns

Reviewed on Oct 4, 2023

Dr Killeen is the best

Reviewed on Sep 20, 2023

I appreciate my doctor and the time that he takes during my visits which is why I drive 20 minutes for my visits and I choose to be under his care.

Reviewed on Sep 18, 2023

Dr. Killeen's engagement to my overall health instills the confidence I have in him to help me manage it. He is always aware of my big picture and has always recommended approaches and processes that have supported my age and activity levels. Dr. Killeen reflects that his concern for me is personal. He is the ideal healthcare provider for me.

Reviewed on Sep 15, 2023

If you had a box for exceptional, that is how I would rate Dr. Killeen and staff.

Reviewed on Sep 15, 2023

Dr. Killeen is the best. He heard my concerns and ran the appropriate blood work to find out what is wrong.

Reviewed on Sep 12, 2023

Dr. Killeen is a great doctor, he is one of the clinics best!

Reviewed on Sep 8, 2023

Dr Killeen responds to messages right away

Reviewed on Sep 8, 2023

Dr. Killeen is the best doctor I have ever had. He really cares about me as a patient and not just a number like other doctors I see at the clinic.

Reviewed on Sep 5, 2023

Dr. Killeen is the one of the best doctor at Cleveland Clinic.

Reviewed on Sep 5, 2023

It was VERY Easy to schedule my appointment with Dr. Killeen using MyChart. It's a GREAT feature!!

Reviewed on Sep 5, 2023

In all my 59 years of life on this earth, I have honestly never had such a GREAT PCP as Dr. Killeen! He is GENUINELY kind, compassionate, efficient, professional, courteous and friendly. It's a pleasure to come visit with Dr. Killeen because I KNOW I am in such great and capable hands. He is TRULY one of the BEST... And a definite CREDIT to Cleveland Clinic. I absolutely KNOW for a FACT that I have nothing to worry about regarding my health because I am now seeing Dr. Killeen.

Reviewed on Sep 5, 2023

Dr Killeen is an active listener, seeks to investigate and find the cause(s) of my v curious ailments.

Reviewed on Aug 24, 2023

Dr. Killeen is an outstanding physician and very professional and above all shows real compassion and understanding. He displays a great sense of humor and very personable. Shows great concern and very thorough with his assessments. Highly recommend Dr. Killeen to anyone. Makes you feel comfortable and relaxed.

Reviewed on Aug 24, 2023

Dr. Killeen listens & completely answers all questions. I am very comfortable talking with him.

Reviewed on Aug 23, 2023

Dr.Killeen is always excellent. He has concern for his patients. He's the best primary Dr. I've ever had. He works well inconjuction with my Oncologist Dr. Dean. Love,love,love them both!

Reviewed on Jul 5, 2023

Dr. Killeen and his staff are very courteous and kind.

Reviewed on Jun 12, 2023

Excellent doctor

Reviewed on Jun 9, 2023

I love Dr. Killeen. He has taken great care of me.

Reviewed on May 31, 2023

Dr. Killeen has excellent people skills. He's knowledgeable and takes time to look at me when I'm talking to him or he's talking to me. He doesn't appear or feel rushed. Dr. Killeen embodies an excellent clinician who treats every patient with respect.

Reviewed on May 31, 2023

Dr. Killeen has an "old school I have all the time in the world" persona combined with 21st century intelligence. He knows what he is doing and is a great physician.

Reviewed on May 22, 2023

Dr Killeen is very personable yet professional and very caring. I thought my appointment was at 7:40 AM but it was scheduled for 7:20 AM. I arrived late at 7:47 AM, yet the scheduler got me in at 8 AM! DR Killeen was understanding about my tardiness and still spent quality time with me *and I'm aware of how busy his schedule can be). He's just a cool dude!

Reviewed on May 22, 2023

As a said earlier, Dr. Killeen is a caring and cool dude!

Reviewed on May 17, 2023

Dr. Killeen is excellent. Thorough and caring.

Reviewed on May 15, 2023

Dr. Killeen is very professional, is thoughtful, he listens and he a kind person.

Reviewed on May 8, 2023

Dr. Killeen has always been very attentive and responsive to all my questions and concerns. I wouldn't be great with following up on my health-care if he was not my physician.

Reviewed on May 1, 2023


Reviewed on Apr 24, 2023

Dr. Killeen takes wonderful care of me. I just can't say enough about him. He is the BEST doctor I have ever had. Highly recommend Dr. Killeen.

Reviewed on Apr 19, 2023

Cleveland clinic is lucky to have a care provider like my doctor. Such a genuine person.

Reviewed on Apr 18, 2023

Dr Killeen, is very thorough and takes time to get to know me. He's excellent

Reviewed on Apr 5, 2023

Best experience I've ever had with a care provider.

Reviewed on Apr 5, 2023

My doctor gives the best care. He listened to all my problems and make sure I g et all my issues are taken care of even seeing seeing other doctors taking blood work letting me know the results. I got the best doctor ever! I wouldn't change him for the world

Reviewed on Apr 4, 2023

Dr. Killeen is a superb physician who takes the time with you, the patient, does a total exam, very professional and very personable. He explains medical information clearly, focuses on your well being. He comes across very concerned and helpful in suggesting medical information. I really highly recommend Dr. Killeen to anyone, he is a great doctor who cares and helps you in anyway possible.

Reviewed on Mar 31, 2023

My doctor is easy to talk to and I felt comfortable to ask any questions I needed

Reviewed on Mar 28, 2023

Dr. Killeen is an excellent, caring physician who I am grateful to have as my primary care provider.

Reviewed on Mar 15, 2023

I trust my doctor's care

Reviewed on Mar 15, 2023

Dr. Killeen is the best doctor I have ever had. He is interested in you. He cares. He gives excellent advice. He is a human being.

Reviewed on Mar 15, 2023

My experience was exceptional. Dr. Killeen is comprehensive In every detail of my checkup. I couldn't more pleased with the experience of my visit.

Reviewed on Mar 10, 2023

He's great- really thorough and good communicator

Reviewed on Mar 9, 2023

I love it when I go see dr.T Killeen. He's a great doctor and up front tell like it is and I love that in a doctor and it shows he cares and he there to help

Reviewed on Mar 8, 2023

Dr. Killeen really seems to care about my health, I always feel well taken care of after my appointments.

Reviewed on Mar 8, 2023

I have consistently been satisfied with Dr. Killeen's care.

Reviewed on Feb 17, 2023

Dr. Killeen is an excellent physician. He takes his time & answers all questions.

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