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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

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

Medical Education - Michigan State University
East Lansing, MI

Undergraduate - University of Michigan
Ann Arbor, MI

Graduate School - Dartmouth College
Public Health

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 3/22/2024, Dr. Killeen has reported the financial relationships with the companies listed below. 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

389 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

71 Patient Comments

Reviewed on Jun 24, 2024

Dr Killeen is always so attentive and kind

Reviewed on Jun 13, 2024

Excellent Doctor

Reviewed on Jun 7, 2024

Dr Killeen is excellent

Reviewed on Jun 7, 2024

I like my doctor he works with me in every way especially with my concerns

Reviewed on Jun 6, 2024

Excellent experiences with every visit that I have with Dr. Killeen

Reviewed on Jun 6, 2024

My experience with Dr K was great he is very kind and helpful he reminds me of my pediatrician always shakes my hand and a smile

Reviewed on May 30, 2024

I was seen by a Neurologist in the emergency room. She and her resident Neurologist were superb. Very patient knowledgeable considerate and kind and caring

Reviewed on May 13, 2024

Dr. Killeen is a wonderful family doctor!

Reviewed on May 13, 2024

Dr Killeen has always been totally focused on me.

Reviewed on May 10, 2024

I never in past or present received other than outstanding experience when I visited or messaged Dr.Killen.

Reviewed on May 6, 2024

My care provider is amazing

Reviewed on May 6, 2024

My doctor is a solid person who cares and listens and is very personable. Can you believe he remembers personal family details. How's the boys Walt? He asked. Cleveland Clinic is lucky to have him.

Reviewed on May 6, 2024

Dr. Killeen is a wonderful doctor. Very thorough and listens to my concerns.

Reviewed on May 1, 2024

I have great respect for Dr. Killeen as both a doctor and a person. He has great intelligence and integrity. He is an asset to Cleve. Clinic

Reviewed on Apr 24, 2024

Dr Kileen is excellent

Reviewed on Apr 23, 2024

Dr. Killeen is great. I feel like he has a really good understanding of my health history and has my best interest in mind when meeting with me. I am fortunate to have finally been able to find a family Dr. That is this good.

Reviewed on Mar 28, 2024

Dr. Killeen is simply the best. He is SO KNOWLEDGEABLE about everything and anything. I am so lucky to have him as my PCP

Reviewed on Mar 26, 2024

I tell all my family and friends to see my doctor because he takes excellent care of me! I have my family coming now.

Reviewed on Mar 20, 2024

Dr Killeen, is thorough and takes time to answer all questions.

Reviewed on Mar 18, 2024

Dr. Killeen always responds to questions and concerns if not the same day, the following day.

Reviewed on Mar 15, 2024

Very respectful and professional. This provider addressed every one of my concerns, and I brought a handful. Dr. Killeen took his time and took action rather than dismissing the issues. I really appreciate his time and attentiveness.

Reviewed on Mar 15, 2024

I feel very fortunate to have Dr. Killeen as my PCP. Dr. Killeen's response time is always immediate and very appreciated.

Reviewed on Mar 14, 2024

Dr. Killeen is absolutely the best.I feel so fortunate to have him as my primary care physician. He is awesome!

Reviewed on Mar 11, 2024

Great Doctor easy to talk too.

Reviewed on Mar 8, 2024

Dr. Very attentive

Reviewed on Mar 1, 2024

Dr. Killeen is always so kind and understanding. I always know that he is really listening to what I have to say

Reviewed on Mar 1, 2024

I just love Dr. Killeen. He is very caring and thorough. I feel confident that he provides extra Ellen's care to me.

Reviewed on Jan 29, 2024

Dr. Killeen went above and beyond to hand an insurance/pharmacy issue to assure I am receiving the correct medication on time.

Reviewed on Jan 23, 2024

Dr. Killeen and his staff are excellent

Reviewed on Jan 19, 2024

Dr. Killeen is one of THE BEST doctors I have ever enountered in my almost 60 years on this earth! His compassion, kindness, bedside manner, concern, professionalism, knowledge, and friendliness is second to none! I am so very glad that I have found Dr. Killeen to be my PCP and for his guidance on my health matters. I trust Dr. Killeen completely!! He is a TRUE credit to Cleveland Clinic and I'm glad he's part of CC !

Reviewed on Jan 15, 2024

Dr. Killeen is great!

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.

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