alert icon Coronavirus

Now scheduling COVID-19 vaccine appointments for ages 12+
Schedule a vaccine appointment
COVID-19 vaccine FAQs

Going to a Cleveland Clinic location?
New visitation hours
Masks are required for patients and visitors (even if you're vaccinated)

Department Gastroenterology, Hepatology & Nutrition
Primary Location North Ohio Gastroenterology
Type of Doctor Adults Only
Languages English
Surgeon No
Locations Specialties & Treatments

Treatment & Services

  • Colonoscopy
  • Egd
  • Flexible Sigmoidoscopy
View all 3 Treatment & Services +

Specialty in Diseases & Conditions

  • Colon Polyps
  • Gastroesophageal Reflux (GERD)
  • General Gastroenterological Disorders
  • Hepatitis C
  • Inflammatory Bowel Disease (IBD)
  • Liver Disease
View all 6 Specialties +


Is Cleveland Clinic Part of Your Insurance?

Review a list of accepted insurance plans for our Northeast Ohio locations or learn more about purchasing a contracted managed care plan.

View All Plans
Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Lutheran General Hospital
Park Ridge, IL USA

Fellowship - Lutheran General Hospital
Park Ridge, IL USA

Residency - Lutheran General Hospital
Internal Medicine
Park Ridge, IL USA

Residency - Lutheran General Hospital
internal medicine
Park Ridge, IL USA

Medical Education - Midwestern University Chicago College of Osteopathic Medicine
Downers Grove, IL USA

Medical Education - Chicago College of Osteo. Med. @ Midwestern University
Downers Grove, IL USA

Undergraduate - Wright State University
Dayton, OH Ohio


  • Internal Medicine
  • Internal Medicine - Gastroenterology
Research & Publications

Research & Publications

See publications for Catherine Ly, 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 12/16/2020, Dr. Ly 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

195 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

33 Patient Comments

Reviewed on May 14, 2021

Dr. Ly was very caring and took her time with me

Reviewed on Apr 30, 2021

professional from entrance to exit...Dr ly and staff were outstanding

Reviewed on Apr 23, 2021

doctor Ly is great

Reviewed on Mar 24, 2021

Dr. Ly Was Awesome, I most Certainly Will Continue To Trust her As my GI doctor In The Future.

Reviewed on Mar 24, 2021

I liked Dr. Ly very much she was extremely helpful.

Reviewed on Mar 19, 2021

I really appreciate Dr Ly's concern for my problem and her work to treat me thhanks

Reviewed on Feb 8, 2021

Staff was great - all around - friendly, knowledgeable (& able to translate into common terms well) and professional. I would recommend Dr. Ly and her team in Westlake.

Reviewed on Jan 27, 2021

Wonderful service and Doctor

Reviewed on Jan 20, 2021

Dr Ly took time to answer all my questions

Reviewed on Jan 13, 2021

My former provider left the Clinic and I was wary about finding a new one, but Dr. Ly fulfilled my expectations and more. I will definitely recommend her to anyone asking! She listened and cares!

Reviewed on Jan 12, 2021

my sister is switching to dr ly

Reviewed on Dec 30, 2020

Dr Ly is amazing she fixed my issue so quickly and I feel so much better!

Reviewed on Dec 30, 2020

Dr Ly is my favorite doctor I have seen in years!

Reviewed on Dec 21, 2020

Dr. Ly was thoughtful and accommodating. I felt safe in her hands.

Reviewed on Dec 14, 2020

*Dr. C. Ly was so kind & explained everything. I felt at ease with her. I've already recommended her to others.

Reviewed on Dec 1, 2020

Thhanks to Dr. Ly I got the care I needed. I was not provided enoughh info to get the video visit

Reviewed on Nov 24, 2020

Dr Ly was excellent to talk with...very unhurried and pleasant!

Reviewed on Nov 20, 2020

Meeting Doctor LY for the first time was made with ease talking to as she was very professional, had clear questions to me and answers.

Reviewed on Nov 16, 2020

Dr. Ly's office was very considerate, efficient and thorough

Reviewed on Nov 13, 2020

Dr Ly always takes the time to understand me as a patient and makes the effort to work with me on what best suits my individual treatment.

Reviewed on Nov 3, 2020

very positive experience with Dr. Ly

Reviewed on Nov 2, 2020

one of the best experiences with a provider I've ever had. she was perfect.

Reviewed on Oct 26, 2020

Dr. Ly was extremely competent and caring. she will be my preferred provider going forward.

Reviewed on Sep 15, 2020

Fine Dr. Makes you feel very comfortable

Reviewed on Sep 1, 2020

Dr Ly was excellent

Reviewed on Aug 7, 2020

3 rating is because the doctor I wanted to see was booked out more than 3 months. However, I had the opportunity to meet Dr. Ly who was very supportive.

Reviewed on Jul 29, 2020

Dr. Ly is very caring and knowledgeable medial professional.

Reviewed on Jul 21, 2020

Dr. Ly was kind and informative. Made me comfortable at the visit.

Reviewed on Jul 20, 2020

Wonderful service. Dr. Ly was absolutely fantastic!

Reviewed on Jun 24, 2020

Felt confident with the doctor's understanding of my concerns and her plan of care.

Reviewed on Jun 22, 2020

Dr. Ly stepped in for Dr. Blades at the last minute after he had a medical issue, and she was terrific. Prior to Dr. Ly getting involved, I was disappointed that I had a hard time getting a response from Dr.Blades' office to my voicemail regarding some questions about the colonoscopy prep.

Reviewed on Jun 22, 2020

Dr. Ly was great. I will recommend her to anyone that needs a colonoscopy.

Reviewed on May 27, 2020

staff was great. Dr Ly wonderful. very responsive very caring and kind

Related Videos Featuring Catherine Ly, DO

Related Videos Featuring Catherine Ly, DO

Back to Top